US20140049057A1 - Lock Ring for Securing a Container Lid - Google Patents
Lock Ring for Securing a Container Lid Download PDFInfo
- Publication number
- US20140049057A1 US20140049057A1 US13/945,876 US201313945876A US2014049057A1 US 20140049057 A1 US20140049057 A1 US 20140049057A1 US 201313945876 A US201313945876 A US 201313945876A US 2014049057 A1 US2014049057 A1 US 2014049057A1
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- United States
- Prior art keywords
- lever
- lock ring
- wall
- clamping
- walls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D45/00—Clamping or other pressure-applying devices for securing or retaining closure members
- B65D45/32—Clamping or other pressure-applying devices for securing or retaining closure members for applying radial or radial and axial pressure, e.g. contractible bands encircling closure member
- B65D45/34—Clamping or other pressure-applying devices for securing or retaining closure members for applying radial or radial and axial pressure, e.g. contractible bands encircling closure member lever-operated
- B65D45/345—Lever-operated contractible or expansible band, the lever moving in the plane of the band
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
- B65D11/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material of curved cross-section
- B65D11/06—Drums or barrels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/20—Clamps
- Y10T292/205—Ring
- Y10T292/212—With expanding or contracting means
- Y10T292/216—Toggle lever
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
A lock ring for securing a lid to a drum-type container has a body with a discontinuous ring shape and first and second free ends. The body has an annular wall and two spaced apart flanges defining a clamping channel facing radially inward. A lever has a grip section and a pivot section at opposite ends. The pivot section is pivotally attached to the body near the first free end. The lever is pivotable between a closed position and an open position and has two walls spaced from one another and connected by a third wall. A lever end is adjacent the first free end and is formed by the annular wall and one flange of the two flanges continuing to the first free end and the other flange of the two flanges terminating short of the first free end. When the lever is in the closed position, the third wall of the lever lies adjacent the annular wall, the annular wall of the lever end is positioned between the two walls of the lever, the body is captured between the two walls of the lever along the grip section, and a portion of one wall of the two walls of the lever lies generally in the same plane as the other flange along the lever end.
Description
- This patent is related to and claims priority benefit of U.S. provisional application Ser. No. 61/672,868 of the same title and filed on Jul. 18, 2012. The entire content of this prior filed provisional application is hereby incorporated herein by reference.
- 1. Field of the Disclosure
- The present disclosure is generally directed to drum-type storage containers and more particularly to a plastic split ring clamp or lock ring for securing a lid to such a container, the ring having a low profile yet strong construction.
- 2. Description of Related Art
- Cylindrical containers or drum containers are known in the art for holding and storing chemicals, industrial materials, and the like. These types of containers are typically large drum sizes and are often constructed of either a metal material such as steel or, particularly in North America, a fiber material. Fiber drums are formed having a metal chime around the top lip or top opening as well as around the closed bottom. In other regions, particularly in Europe and the Far East, such drum containers are often formed of non-metallic and non-fibrous materials, such as plastic materials. With the rapid globalization of commerce, it has become much more common that plastic material is used for fabricating these types of drums, as well as for fabricating their removable lids. In this regard, there are ecological and other advantages associated with use of plastic drums and lids, such as the material being recoverable or recyclable.
- Each container of this type has a replaceable lid retained in position by a split ring clamp or lock ring in order to securely close the top opening. International standards are developing, which may supplant separate national standards to regulate the performance of these types of drums and lids. From a national standpoint, the United States Department of Transportation (DOT), Research and Special Programs Administration, has produced standards and specifications for drum performance. Standards also have been promulgated by the United Nations organization. DOT standards typically call for drop tests to make sure the drums won't leak when subjected to some abuse or trauma during use.
- The drums to be tested are filled with dry, finely powdered material to a specific net weight. The drums are then closed with the lids and then clamped by the split ring or lock ring. Depending upon the standards involved, the containers are required to withstand a drop from varying heights and at various orientations onto a hard surface such as concrete. To pass such tests or meet the standards, the drums must recover from such drops without rupture or leakage. One international testing approach involves a similar drop test, except that the drums are filled with water instead of powdered materials. Such tests also include a seal test where the drums are filled with water and upended to determine the presence of a leak.
- The lids that typically close these types of drums are formed from stamped metal or molded plastic. The lids are then secured onto the drums by the split ring clamps or lock rings. Such clamps or lock rings have a channel to capture a rim of the lid-to-drum interface. An over-center lever is generally used to draw the ends of the split ring clamp structure together. In the past, these lock rings or clamps were made of steel and were durable and very strong and sturdy, but also quite heavy and expensive. However, for many packaging, transportation, and incinerator container applications, industrial users of such drum containers have sought to avoid metal components such as lids and lock rings or split ring clamping devices. The known metal devices do not burn, are prone to corrode, and can sometimes insert minute metallic contaminants with the material packaged within the containers.
- Plastic lids have been successfully developed, such as is described in U.S. Pat. No. 4,718,571. For some period of time, the development of corresponding plastic clamping rings, which could remain competitive in terms of cost and clamping performance, eluded those in the art until a successful all-plastic polymeric two-piece split ring clamp was devised. Such a plastic clamp ring found success in conjunction with fiber type drums, and is described in U.S. Pat. No. 5,129,537.
- The two-piece polymeric split ring clamp described in the above noted '537 patent has remained popular for use with fiber-based drums. However, its experimental application for clamping plastic lids on plastic drums demonstrated a need for a more secure union between drum and lid. Plastic drums and lids typically are less rigid or study than metal drums, fiber drums with steel chimes, and metal lids. Further, the plastic split ring clamp, while advantageously being formed of only two major parts, had exhibited a profile at its over-center pivot level that protruded outwardly a substantial amount from the side of the drum and lid to which it is secured. Such a large protruding ring portion can significantly hinder drum stacking and handling. Also, when containers employing plastic lids and plastic drums are subjected to drop tests, excessive stress was detected, for example, upon the lever pivot shaft or pin of the clamping system.
- U.S. Pat. No. 5,713,482 disclosed a split ring clamp or lock ring that provided a degree of improved performance in these areas. However, the ring disclosed in the '482 patent still has a relatively large cross section profile and a relatively large protruding lever.
- In one aspect according to the teachings of the disclosure, a lock ring is disclosed for securing a lid to a drum-type container. The lock ring has a body with a discontinuous circular ring shape. The body has a first free end and a second free end, an annular wall, and two spaced apart flanges together defining a clamping channel facing radially inward. A lever has a grip section at one end and a pivot section at an opposite end. The pivot section is pivotally attached to the body near the first free end. The lever is pivotable between a closed position and an open position and has two walls spaced from one another and connected by a third wall. A lever end is adjacent the first free end of the body. The lever end is formed by the annular wall and by one flange of the two flanges continuing to the first free end and the other flange of the two flanges terminating short of the first free end. When the lever is in the closed position, the third wall of the lever lies adjacent the annular wall, the annular wall of the lever end is positioned between the two walls of the lever, the body is captured between the two walls of the lever along the grip section, and a portion of one wall of the two walls of the lever lies generally in the same plane as the other flange along the lever end of the body.
- In one aspect of the disclosure, the portion of the one wall can be formed by a stepped down segment in a central section of the lever from the grip section to the central section.
- In one aspect of the disclosure, the one wall of the lever can be aligned with and generally parallel to the other flange when the lever is in the closed position.
- In one aspect of the disclosure, a clamping end can be provided on the second free end of the body. The clamping end can have a clamping bar that can be coupled to part of the lever.
- In one aspect of the disclosure, the lock ring can include a clamping end on the second free end of the body. The clamping end can have two walls. One of the two walls of the clamping end can lie against the outside of the one wall on the stepped down segment when the clamping end is connected to the lever.
- In one aspect of the disclosure, the lock ring can include a clamping end on the second free end of the body and the clamping end can have two spaced apart walls. One of the two walls on the clamping end can lie generally in the same plane as the one wall on the grip section of the lever.
- In one aspect of the disclosure, the lock ring can include a pocket formed in the third wall of the lever and a clamping end on the second free end of the body. The clamping end can engage the pocket to indirectly connect the first and second free ends of the body.
- In one aspect of the disclosure, the lock ring can include a clamping end on the second free end of the body. The clamping end can have a clamping bar between two walls of the clamping end. The clamping bar can engage a pocket on the lever.
- In one aspect of the disclosure, the lock ring can include a clamping end on the second free end of the body. The clamping end can have a clamping bar and the clamping end and clamping bar can be integrally formed as a part of the body and from the same material as the body.
- In one aspect of the disclosure, the lever can include a pocket on the third wall. The pocket can include two slots, one formed in each of the two walls of the lever and adjacent the third wall. A clamping bar of the second free end can seat in the two slots.
- In one aspect of the disclosure, the lever can have a cover over a pocket in the third wall. The cover can be a flexible part of the third wall and can have an attached end and a detached end. The detached end can provide access for a clamping bar on the second free end to the pocket and to slots of the pocket.
- In one aspect of the disclosure, the lever can include a pocket and the pocket can include two slots, one formed in each of the two walls of the lever and adjacent the third wall.
- In one aspect of the disclosure, the lever can have a cover over a pocket in the third wall. The cover can be a flexible part of the third wall and can have an attached end and a detached end. The detached end can provide access to the pocket.
- In one aspect of the disclosure, the lock ring can include a hook on the annular wall of the body and spaced from the first free end. The hook can have a catch. A pivot pin can be provided on the pivot end of the lever. The pivot pin can be detachably connectable to the catch of the hook.
- In one aspect of the disclosure, the lock ring can have a hook that is integrally formed as a part of the annular wall and from the same material as the body and can have a pivot pin that is integrally formed as a part of the lever and from the same material as the lever. The pivot pin can be attached to the hook.
- In one aspect of the disclosure, the lock ring can include an aperture in the lever end near the first free end of the body and a protrusion on an inside surface of the annular wall within a portion of the clamping channel near the second free end of the body. The protrusion can seat in the aperture when the second free end of the body is connected to the lever and the lever is in the closed position.
- In one aspect of the disclosure, the annular wall and the two flanges of the body can form a generally C- or G-shaped structure in cross-section.
- In one aspect of the disclosure, a lower flange of the two flanges of the body can have a lip formed on an innermost edge thereof. The lip can depend below the lower flange.
- In one aspect of the disclosure, the lock ring can include a lock tab that protrudes from a portion of the annular wall and can have a lock hole formed through the lock tab. A pass-through opening can be formed in the two walls of the lever. When the lever is in the closed position, the lock tab can be positioned between the two walls of the lever and the lock hole can be aligned with the pass-through opening in the lever.
- In one aspect of the disclosure, the body and the lever can be formed of molded plastic materials.
- Objects, features, and advantages of the present invention will become apparent upon reading the following description in conjunction with the drawing figures, in which:
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FIG. 1 shows a perspective view of a plastic type storage container or drum with a lid secured by one example of a lock ring constructed according to the teachings of the present disclosure. -
FIG. 2 shows a top view of the drum and lid and the lock ring ofFIG. 1 . -
FIG. 3A shows a cross-section taken alongline 3A-3A inFIG. 2 of the upper end of the drum, the lid, and a band or ring body portion of the lock ring. -
FIG. 3B shows a cross-section taken alongline 3B-3B inFIG. 2 of the upper end of the drum, the lid, and a clamping or lever portion of the lock ring. -
FIG. 4 shows a perspective view of the clamping or lever portion of the lock ring ofFIGS. 1-3B and with the band or ring body in an engaged or closed configuration and the lever in a closed position. -
FIG. 5 shows the clamping or lever portion ofFIG. 4 but with the band or ring body in a disengaged configuration and the lever in an open position. -
FIG. 6 shows an exploded view of the clamping or lever portion of the lock ring ofFIG. 5 with the lever separated from the band or ring body. -
FIG. 7 shows a cross-section taken along line 7-7 inFIG. 5 of the band or ring body of the lock ring therein. -
FIG. 8 shows a cut-away view of the clamping or lever portion of the lock ring ofFIGS. 4-6 and with the band or ring body engaged and the lever partially opened. -
FIG. 9 shows the clamping or lever portion of the lock ring ofFIG. 8 but with the lever in the closed position. -
FIG. 10 shows a cross-section taken along line 10-10 inFIG. 9 of the clamping or lever portion of the lock ring. -
FIG. 11 shows a cross-section taken along line 11-11 inFIG. 9 of the clamping or lever portion of the lock ring. - The lock ring disclosed and described herein solves or improves upon one or more of the above-noted and/or other problems and disadvantages with prior known lock rings, split ring clamps, and like clamping devices of this type. The disclosed lock ring has a relatively low profile band or ring body and clamping or lever portion when engaged and closed. However, the ring body and lever are still robust and sturdy for use with plastic drums and lids so as to help retain the shape of the drum and hold the seal between drum and lid during a drop test. The disclosed lock ring is configured so that the lever, when closed, nests within the vertical footprint of one end of the ring body to produce a lower profile lock ring compared to existing metal and plastic lock ring products. The lever, when closed, also lies very close to flush in a radial outward direction with an outward facing surface of one end of the ring body, thus reducing the degree that the lever portion of the lock ring protrudes radially outward. The disclosed lock ring and lever thus have a lower vertical and lesser radial profile, which improves handling and stacking capability of drums with secured lids. These and other objects, features, and advantages of the disclosed low profile lock ring may become apparent upon reading this disclosure.
- Turning now to the drawings,
FIG. 1 shows acontainer assembly 20 which has a receptacle ordrum 22, such as a conventional molded plastic type drum. Thedrum 22 can have an integral molded bottom at thebase 24 of the drum. Alid 26 is attached to thedrum 22 to close off a top opening of the drum. Thelid 26 can be a plastic lid (i.e., polyolefin or the like) or can be another type of lid formed from any suitable material. Anupper end 28 of thedrum 22 forms a top opening into the drum as is known in the art. - As shown in
FIGS. 1 and 2 , thelid 26 can be secured to thedrum 22 by alock ring 30, sometimes known generally in the art as a split clamp ring. Thelock ring 30 in the disclosed example has a low profile and can have an all plastic two-piece construction. When secured and clamped or closed around theupper end 28 of thedrum 22, thelock ring 30 secures thelid 26 and clamps it in place on the drum over the top opening.FIGS. 3A and 3B show cross-sections of the top opening of thedrum 22 including thelock ring 30 and thelid 26. Thelock ring 30 generally has a band orring body 32 that can have a ring shape and a generally G- or C-shaped cross section over a majority of its length. Thelock ring 30 also generally has a clamping orlever portion 34 with alever 36 that can be manipulated to clamp or release the lock ring. - With reference to
FIGS. 3A and 3B , atypical plastic drum 22 of this type may have abead 40 formed as a thickened portion at theupper end 28 and extending around the top opening of the drum. An undercut 42 may be formed under ashoulder 38 that extends around aside wall 44 of thedrum 22 below thebead 40. The undercut 42 can extend radially inward into theside wall 44 near the top opening and below thebead 40. Thetypical lid 26 can have acircumferential rim 46 with a dependinglip 48 that forms anupward channel 50 around the rim and radially within the lip. A seal orgasket 52 can be seated in aseat 54 formed into a surface of thechannel 50. When thelid 26 is installed on thedrum 22, thebead 40 can seat in thechannel 50 and the seal orgasket 52 can be captured and compressed between the bead and the channel surfaces to form a tight lid seal. The shape, size, and contour of thebead 40 and thechannel 50 can be formed to closely mirror and mate with one another. -
FIGS. 4-7 show several views of one example of thelock ring 30 and constructed according to the teachings of the present disclosure.FIG. 4 illustrates thering body 32 in an engaged configuration and thelever 36 of the clampingportion 34 in a closed position.FIG. 5 shows thering body 32 in a disengaged or detached configuration and thelever 36 in an open position.FIG. 6 shows thelever 36 removed from thering body 32 andFIG. 7 depicts the cross-sectional shape of a majority of the length of the ring body. - The
lock ring 30 is for fixing or securing thelid 26 to a drum-type container, such as theplastic drum 22. Generally, the majority of thering body 32 in this example has a C- or G-shape in cross section, as can be seen inFIGS. 3A and 7 . This majority segment of thering body 32 has an upper flange orleg 60, a lower flange orleg 62 spaced below the upper flange, and anannular wall 64 extending between and connecting the upper and lower flanges. The upper andlower flanges annular wall 64 and form a clampingchannel 66 on the radially inward facing side of thering body 32. As shown inFIG. 3A , when thelock ring 30 is installed on thedrum 22, the top opening of the drum and thelid 26 are captured in the clampingchannel 66 of the lock ring. Theupper flange 60 is positioned over therim 46 of thelid 26. Thelower flange 62 is positioned under theshoulder 38 and in the undercut 42 of thedrum 22. - If desired, the upper and/or lower flanges and the rim and/or shoulder can be contoured so that the
ring body 32 snaps onto the assembled drum and lid. However, in this example, the rim and top opening are merely captured in the clamping channel of thelock ring 30 when installed. The size of the clampingchannel 66 can be sized so as to create a snug or interference fit with the spacing of theshoulder 38 and thebead 40 and rim 46 when installed.FIG. 3B shows the clamping orlever portion 34 of thelock ring 30 in the closed position, which tightly secures the lock ring around thedrum 22 and thus retains and secures thelid 26 on the drum. - As shown in
FIGS. 5 and 6 , thering body 32 is a split ring with twofree ends hook 74 is integrally molded as part of thering body 32 and protrudes radially outward from a surface of theannular wall 64. Thehook 74 is spaced circumferentially a first distance from a first of the free ends 70 at the split in the ring body. Thehook 74 has a concave face that defines acatch 76, which faces away from the firstfree end 70. Thehook 74 has arobust body 78 that is sturdy and strong and integrally joined to thering body 32 in this example. - The second
free end 72 of thebody 32 at the split is configured to form a clampingend 79 of thelock ring 30. The clampingend 79 has an integrally molded clampingbar 80 that extends vertically or widthwise across thering body 32 between upper andlower walls bar 80 can have a relatively robust or larger diameter element for sufficient strength to accommodate use with all-plastic drums. Thewalls lower flanges free end 72. The clampingbar 80 is exposed at the secondfree end 72 through anopening 86 in thering body 32 adjacent the secondfree end 72. Theannular wall 64 terminates at a distance from thefree end 72 to form theopening 86, as shown inFIGS. 5 and 6 . The upper andlower walls end 79 are larger in an outward radial direction of thelock ring 30 and are spaced further apart than the adjacent upper andlower flanges ring body 32. As discussed below, at least part of thelever 36 is narrower or vertically shorter than the spacing of thewalls lock ring 30 can be defined by thewalls end 79 of thering body 32 or by a portion of thelever 36. As noted below, the height of this tallest portion can be reduced by reconfiguring the lever and clamping end of the ring body. - As shown in
FIGS. 5 , 6, 8, and 9, alever end 88 of thering body 32 is formed adjacent the firstfree end 70. In this example, theupper flange 60 terminates a distance from the firstfree end 70 of thering body 32. This leaves only an exposed upper edge of theannular wall 64 and thelower flange 62 along the edges of the annular wall over thelever end 88. Thelever end 88 has a length in this example that coincides with the length and location of a corresponding portion thelever 36 when in the closed position, as discussed below. - A
lock tab 92 protrudes from the radially outward facing surface of theannular wall 64. Thelock tab 92 is spaced circumferentially further from the firstfree end 70 than thehook 74. In this example, both thelock tab 92 and thehook 74 are on thelever end 88 portion of theannular wall 64 as shown inFIG. 6 . Ahole 94 is provided through thelock tab 92 and is oriented vertically in this example. - As shown in
FIGS. 5 , 6, 8, and 9, an aperture orway 96 can be formed on thering body 32 near the firstfree end 70 in theannular wall 64 on thelever end 88. A corresponding protrusion or key 98 can project from an inside surface of theannular wall 64 on the clampingend 79 within the clampingchannel 66. When thelever end 88 and the clampingend 79 are engaged, theprotrusion 98 can seat in theaperture 96. This arrangement can help increase the hoop strength of thelock ring 30 and reduce stress on the other engaged components during use, as discussed below. - The
lock ring body 32 can vary in configuration and construction from the example described herein. The size and dimensions of the lever end components and the clamping end components can be altered. Though the ring body and the aforementioned components are all formed as one integral piece of the same material, the ring body can be formed of one piece and one material and one or more of the lock tab, hook, protrusion, and clamping bar can be formed as separate pieces and be attached to the ring body. In another example, theentire lever end 88 and/or clampingend 79 can also be constructed as separate pieces that are attached to the ring body. However, the one-piece unitary construction of the ring body as disclosed herein can provide a lock ring that is easy to manufacture, ship, store, and stock, that requires little to no assembly, and that is relatively robust, strong, and sturdy. - With reference again to
FIGS. 5 , 6, 8, and 9, thelever 36 of thelock ring 30 in this example is an over-center lever that is pivotally and detachably connected to thering body 32. Thelever 36 can have anelongate grip section 100 at one end that can be easily grasped by a user and that can provide mechanical advantage to clamp thelock ring 30 closed. The other end of thelever 36 can be apivot section 102 that is connectable to thering body 32. Thelever 36 in this example is generally U- or C-shaped in cross-section and has an outervertical wall 104 that extends between and connects upper andlower walls - The
pivot section 102 of thelever 36 can have apivot pin 110 that is integrally formed as a part of the lever. Thepivot pin 110 extends between the upper andlower walls pivot section 102. Aclearance hole 112 is provided through thevertical wall 104 at the end of thepivot section 102 and exposes thepivot pin 110. Thehook 74 is configured to fit through theclearance hole 112 as shown inFIGS. 5 , 6, and 9 when assembled and provides clearance for the hook when pivoting the lever. Thepivot pin 110 can snap onto thecatch 76 on thehook 74 to easily attach thelever 36 to thering body 32 without the use of or need for tools, as depicted inFIG. 9 . No separate pivot pin, metal or otherwise, need be installed and no separate installation or attachment steps for such a pin are needed as a result. Thus, thelever 36 can be easily attached to and detached from thering body 32. - In this example, a
central section 114 of thelever 36 has a flexible finger or cover 116 formed by part of thevertical wall 104. Oneend 115 of thecover 116 is detached from thelever 36 while the other end remains attached via a flexible connection or joint, such as a living hinge or the like. Aslot 118 is formed along each of the upper andlower walls cover 116. Thedetached end 115 and theslots 118 separate three sides of thecover 116 from thelever 36. Thecover 116 can thus flex about the other attached end. Apocket 120 is defined beneath the cover in thelever 36 between theslots 118. Thecover 116 generally lies over the pocket. Blind ends 122 of theslots 118 are adjacent the proximal or attached end of thecover 116. The blind ends 122 and the attached end of thecover 116 form a closed end of thepocket 120 closer to thepivot pin 110. Thedetached end 115 of thecover 116 defines an opening onto thepocket 120, accessible when the cover is flexed radially outward away from thelever 36. As shown inFIGS. 4 , 8, and 9, an inside face of thecover 116 can include a rib orprotrusion 124. A notch orreceiver 126 can be provided on a surface of thevertical wall 104 or on a contact surface 128 provided at the distal end within thepocket 120 as shown. When thecover 116 is fully closed, therib 124 can seat in thenotch 126 to stabilize thecover 116 when the lever is closed and thelock ring 30 is clamped onto thedrum 22. - To install the
lock ring 30, the clampingchannel 66 is mounted over thecontainer bead 40 to secure thelid 26 in place as described above and shown inFIGS. 1-3A . If not already attached, thepivot pin 110 of thelever 36 can be snapped onto thehook 74. Thegrip section 100 of thelever 36 can be pivoted away from thering body 32 about thepivot pin 110 to an open position even beyond that shown inFIG. 5 . Thecover 116 can be flexed away from thecentral section 114 of thelever 36 and the clampingbar 80 can be slid under thedetached end 115 and into thepocket 120. In doing so, the firstfree end 70 and secondfree end 72 will partially overlap one another in this example, as shown inFIG. 8 , with the clampingbar 80 positioned circumferentially past the firstfree end 70 and thehook 74. Thelever 36 can then be pivoted back toward thering body 32. As thelever 36 is moved from the open position to a partially closed position, the clampingbar 80 will slide along theslots 118 to the blind ends 122, as shown inFIG. 8 . Thelever 36 can then be further pivoted to a closed position against thering body 32 as shown inFIG. 9 . Because the clampingbar 80 is captured in theslots 118 and bottomed out against the blind ends 122, the secondfree end 72 and the clampingend 79 are drawn further over the firstfree end 70 and thelever end 88 of thering body 32. This reduces the circumference of thering body 32 so that thelock ring 30 clamps down around thedrum 22 andlid 26. - As shown in
FIG. 10 , the upper andlower walls grip section 100 of thelever 36 lie over the upper andlower flanges ring body 32 beyond thelever end 88 on the ring body. The upper andlower walls lower flanges lever 36,ring body 32, and lever end 88 can produce a closed, clampedlock ring 30 that has maximum profile height that is essentially that of the grip section of thelever 36. The majority of thering body 32 can have a lesser profile height over its length. - The
pocket 120 creates a pass-through opening defined through thecentral section 114 of thelever 36 and across theslots 118, as shown inFIG. 11 . Thelock tab 92 lies within the interior of thelever 36 in the closed position. Thehole 94 is aligned with theslots 118 and thus the pass-through opening of thepocket 120. Thelock tab 92 is also positioned upstream of the clampingbar 80 in the closed position as well. Thehole 94 through thelock tab 92 is thus accessible across thepocket 120 or pass-through opening. SeeFIGS. 6 , 9, and 11. Alock strap 130 or a locking tie or lock is depicted inFIG. 2 and can be threaded through thehole 94 and across theslots 118 or pass-through opening of thepocket 120 to secure thelever 36 in the closed position. Thelock strap 130 being fixed to thelock tab 92 will create a barrier within theslots 118 andhole 94 to prevent thelever 36 from being pivoted away from thering body 32. Thelock strap 130 and thelock tab 92 also create a barrier lengthwise along theslots 118 to prevent the clampingbar 80 from sliding or translating toward the access opening of thepocket 120 at thedetached end 115 of thecover 116. Thelock strap 130 can also be configured to secure thecover 116 in place with therib 124 seated and held in thenotch 126. This can prevent the clampingbar 80 from forcing thecover 116 open in the radially outward direction in the event the container assembly is exposed to a drop or other type of impact. As noted above, the key orprotrusion 98 on the inside of the clampingend 79 can also seat in theaperture 96 in thelever end 88 when closed and clamped. The engagedaperture 96 and key 98 can help take up some of the tensile stress that would otherwise be applied to thepivot pin 110 andhook 74 and to the clampingbar 80 andlever pocket 120. Thus, thelock ring 30 can be locked and retained in the closed and clamped configuration. When closed, clamped, and locked, the disclosedlock ring 30 secures thelid 26 to thedrum 22, has a low profile, an unobtrusive height, a relatively low radial depth, and yet provides a very strong, robust, and durable structure. - In the closed and clamped configuration of
FIGS. 1 , 2, and 9, the first and second free ends 70, 72 of thering body 32 at the split are indirectly engaged at multiple connection points and overlap one another. Thering body 32 will be under significant tension when closed, clamped, and locked on thedrum 22. The construction of thelock ring 30 distributes the tensile loads among the several connection points. - As shown in
FIGS. 4-6 and 9, the clampingend 79 of thering body 32 is slightly larger than the adjacentring body flanges annular wall 64. Atransition section 132 between thering body 32 and the clampingend walls segment 134 of a size between that of thering body 32 and the clampingend 79. The stepped upsegment 134 is connected to thering body 32 at a firstadjoining region 136 and connected to the clampingend 79 at a secondadjoining region 138. Theupper wall 106 of thelever 36 has a stepped downsegment 140 in thecentral section 114 as shown inFIGS. 5 and 6 . Thus, thegrip section 100 of thelever 36 is taller between the upper andlower walls segment 140 and thelower wall 108 in thecentral section 114 of the lever. The stepped downsegment 140 and thelower wall 108 are sandwiched between the upper andlower walls clamping section 79 when the lever is closed and the lock ring is clamped. The vertical dimension of the stepped downsegment 140 is sized so that theupper wall 82 of the clampingend 79 lies vertically flush with theupper wall 106 of thegrip section 100 on thelever 36 when thelock ring 30 is closed and clamped, as shown inFIGS. 1 and 11 . Thus, the tallest point on thelock ring 30 in this example would be theupper wall 106 of thegrip section 100 and theupper wall 82 on the clampingend 79. The lowest point on thelock ring 30 would be thelower wall 84 on the clampingend 79 because it lies over thelower wall 108 on thelever 36, which has no stepped segment. - The design of the
lock ring 30 in this example lowers the overall profile height of the lock ring and provides a very low profile on the top side of the ring. This can make stacking of drums one on top of the other easier and can reduce inadvertent contact with thelever 36 while handling the drums. Thelever 36 is also relatively low profile in a radial direction. The furthest radial outward point on thelock ring 30 in this example can be thecover 116. The height and radial depth of the lock ring in this example can be reduced by reconfiguring the lever and ring body. - In the closed and clamped position, the upper and
lower walls end 79 lie against the outside surfaces of the stepped downsegment 140 and thelower wall 108 on thelever 36. Thus, the clampingend walls lock ring 30. These can be formed relatively thin and still provide sufficient strength under tension during use, particularly with the multiple connection points provided between the split ends of thelock ring 30 when closed and clamped. As shown inFIGS. 10 and 11 , thelower flange 62 of thering body 32 can have adownturned lip 142 over the length of the lower flange. Thelower wall 108 on thelever 36 can be sized so as to lie flush with or above the bottom edge of thislip 142. The lip can be constructed to add stiffness and rigidity to the ring body and can define the lowermost dimension of thelock ring 30. Thelip 142 can abut thesidewall 44 of thedrum 22 to keep thering body 32 from twisting rearward, i.e., helping to prevent theupper flange 60 from releasing upward or outward during use. Thus, the lip can be relatively substantial and aid in maintaining a round shape to the top opening of the drum during use. On known lock rings, the lever, clamping end, and lever end each typically have a much taller profile height and radial depth dimension. The lever portions on known lock rings are considerably taller and deeper than the height and depth of the ring body. The combined, stacked heights of these parts of a conventional, known lock ring are thus much larger than that of the ring body itself. The construction of thelock ring 30 thus has a significantly lower profile height over its entire circumference than the typical height of a conventional lock ring with the lever closed and clamped. - As shown in
FIGS. 8 and 9 , thelever end 88 of thering body 32 can be sized to fit and seat within the upper and lower flanges of the ring body at the stepped upsegment 134 near the clampingend 79. Because thelever end 88 has no upper flange 60 n this region of thering body 32, the vertical spacing of the flanges in the stepped upsegment 134 near the clampingend 79 can be relatively narrow, further lowering the permissible vertical profile thelock ring 30. Thehook 74 on thelever end 88 of thering body 32 is positioned to pass through theopening 86 in the clampingend 79, also as shown inFIGS. 1 and 9 . The radial protruding dimension of thehook 74 can be such that it lies flush with the vertical wall of the clampingend 79 when closed and clamped. Thus, the radial depth of thelock ring 30 can also have a relatively low profile compared to known lock ring designs. The maximum dimension in the radial direction is defined by the height of thelever 36, and specifically thecover 116, when closed and clamped. - Both the
ring body 32, within the clampingchannel 66, and thelever 36, within thewalls FIG. 8 , for example) can have one or more lengthwise, vertical, and/orother ribs 150 or additional features to add strength and rigidity to the disclosed lock ring, if desired. Also, theslots 118 andpocket 120 can include reinforced portions (not shown) that extend radially inward. The reinforced portions can be provided with a through-hole that aligns with thelock tab 92 andhole 94 when the lever 35 is closed, for added strength and rigidity, if desired, as well. Thelock tab 92 can be closely captured in a gap defined by such reinforcing structure if desired. - As will be evident to those having ordinary skill in the art upon reading this disclosure, the specific configuration and construction of the lock ring disclosed and described herein can vary from the example shown. Positional relationships, sizes, shapes, surface contours, and the like can vary and yet function as intended. Features of the lock ring can also be added or removed, as well as altered, without departing from the spirit and scope of the present invention. In addition, the material used to form the unitary lock ring disclosed and described herein can vary considerably as well. However, the material should be suitable to allow for formation of the various disclosed features of the lock ring. The material can be a moldable plastic type material and the materials of the
lever 36 andring body 32 need not be the same. - The low profile lock ring disclosed herein is particularly useful for all-plastic type drums that have no steel chimes to help maintain the round shape of the
base 24 and top opening at theupper end 28. Thus, the ring body can be constructed having a sturdy, substantially rigid form. When attached to the drum, the lock ring can add strength and rigidity to the drum structure, particularly around the top opening. The ring body can have a robust form based on wall thickness and material characteristics. By having thelower flange 62 of the ring body extend through thelever end 88 to the secondfree end 72 of the ring, the strength characteristics of the ring body can be substantial, even while lowering the profile by eliminating theupper flange 60 in the lever end. Thus, the lock ring can provide a mechanism to help retain the round shape of the drum top opening when closed and clamped onto the drum, particularly in the event of a sudden drop or other impact on the container assembly. The lock ring also can provide hoop strength, i.e., strength under tension, created by the robust construction of the lever and clamping components and the several connection points. The disclosed low profile lock ring can be designed with different ring flange, wall, and lever wall thicknesses, shapes, contours, and the like to produce the desired ring sturdiness. Thus, the lock ring can not only provide hoop strength, but can also be configured to increase the strength of the drum opening when the lid is attached to aid in holding the shape of the drum and lid during use. - The size and shape of the container assembly can vary as well. Thus, the size and shape of the lid and the lock ring can also vary to accommodate. The disclosed lock ring can be utilized on containers other than all-plastic type drums, if deemed to be suitable for a particular application.
- When installed, a snap-on structure of the lock ring, lid, and drum, if provided, may help retain the lock ring on the assembled lid and container. The ring body can be configured to snap over a lid lip and container shoulder in other ways while still providing a force-fit or positive engagement between the ring body and the lid and drum. Thus, the configuration and construction of the ring body, drum top opening, and lid rim components can be varied from the example herein and yet function as intended.
- The diameter of the ring body is sized so that it can readily fit around the circumference of the assembled lid and drum in the open configuration. When installed, and when the pivot pin is received in the hook, the user can begin to pivot the lever toward the closed position in the direction toward the ring body. This motion will draw the two ring body free ends together, reducing the circumference of the lock ring and securing the ring around the lid and container. Various parts, such as the pivot pin and hook, the clamping bar, slots, and pocket, and the lock tab and pass-through opening across the pocket, can be reversed on the parts, if desired and feasible, while the basic function of the lock ring is maintained.
- The upper wall of the lever within the stepped down
segment 140 nests into position where theupper flange 62 of thering body 32 has been eliminated at thelever end 88. Thewider grip section 100 of thelever 36 straddles over and captures theentire ring body 32 structure between the upper andlower walls lower walls end 79 fit over and cover the walls of the lever on the stepped downsegment 140. As shown inFIG. 1 , the stepped downsegment 140 is lengthy enough to allow some play to permit the clampingbar 80 to first be inserted into thepocket 120 before being pulled toward the blind ends 122. The narrower or lesstall segment 140 of thelever 36 allows the height of the clampingend 79 to be less tall, generally matching that of the taller lever height at thegrip section 100. This lock ring structure can produce a closed, clamped lock ring with a reduced profile height. This profile height is lower than the typical height of a conventional plastic or steel lock ring for all-plastic drums or containers with the lever closed and clamped. - Although certain lock ring features, functionality, and components have been described herein in accordance with the teachings of the present disclosure, the scope of coverage of this patent is not limited thereto. On the contrary, this patent covers all embodiments of the teachings of the disclosure that fairly fall within the scope of permissible equivalents.
Claims (20)
1. A lock ring for securing a lid to a drum-type container, the lock ring comprising:
a body having a discontinuous circular ring shape, the body having a first free end and a second free end, the body having an annular wall and two spaced apart flanges together defining a clamping channel facing radially inward;
a lever having a grip section at one end and a pivot section at an opposite end, the pivot section pivotally attached to the body near the first free end, the lever pivotable between a closed position and an open position and having two walls spaced from one another and connected by a third wall; and
a lever end adjacent the first free end of the body, the lever end formed by the annular wall and one flange of the two flanges continuing to the first free end and the other flange of the two flanges terminating short of the first free end,
wherein, when the lever is in the closed position, the third wall of the lever lies adjacent the annular wall, the annular wall of the lever end is positioned between the two walls of the lever, the body is captured between the two walls of the lever along the grip section, and a portion of one wall of the two walls of the lever lies generally in the same plane as the other flange along the lever end of the body.
2. The lock ring according to claim 1 , wherein the portion of the one wall is formed by a stepped down segment in a central section of the lever from the grip section to the central section.
3. The lock ring according to claim 1 , wherein the one wall of the lever is aligned with and generally parallel to the other flange when the lever is in the closed position.
4. The lock ring according to claim 1 , wherein a clamping end is provided on the second free end of the body, the clamping end having a clamping bar that can be coupled to part of the lever.
5. The lock ring according to claim 1 , further comprising a clamping end on the second free end of the body, the clamping end having two walls, wherein one of the two walls of the clamping end lies against the outside of the one wall on the stepped down segment when the clamping end is connected to the lever.
6. The lock ring according to claim 5 , wherein the one of the two walls on the clamping end lies generally in the same plane as the one wall on the grip section of the lever.
7. The lock ring according to claim 5 , further comprising:
a pocket formed in the third wall of the lever, wherein the clamping end engages the pocket to indirectly connect the first and second free ends of the body.
8. The lock ring according to claim 7 , wherein the clamping end has a clamping bar between two walls of the clamping end, the clamping bar engaging the pocket on the lever.
9. The lock ring according to claim 8 , wherein the clamping end and clamping bar are integrally formed as a part of the body and from the same material as the body.
10. The lock ring according to claim 7 , wherein the pocket includes two slots, one formed in each of the two walls of the lever and adjacent the third wall, a clamping bar of the clamping end being seated in the two slots.
11. The lock ring according to claim 10 , wherein the lever has a cover over the pocket in the third wall, the cover being a flexible part of the third wall and having an attached end and a detached end, the detached end providing access to the pocket and slots for the clamping bar.
12. The lock ring according to claim 7 , wherein the pocket includes two slots, one formed in each of the two walls of the lever and adjacent the third wall.
13. The lock ring according to claim 11 , wherein the lever has a cover over the pocket in the third wall, the cover being a flexible part of the third wall and having an attached end and a detached end, the detached end providing access to the pocket and slots.
14. The lock ring according to claim 1 , further comprising:
a hook on the annular wall of the body and spaced from the first free end, the hook having a catch; and
a pivot pin on the pivot end of the lever, the pivot pin detachably connectable to the catch of the hook.
15. The lock ring according to claim 14 , wherein the hook is integrally formed as a part of the annular wall and from the same material as the body and the pivot pin is integrally formed as a part of the lever and from the same material as the lever.
16. The lock ring according to claim 1 , further comprising:
an aperture in the lever end near the first free end of the body; and
a protrusion on an inside surface of the annular wall within a portion of the clamping channel near the second free end of the body,
wherein the protrusion seats in the aperture when the second free end of the body is connected to the lever and the lever is in the closed position.
17. The lock ring according to claim 1 , wherein the annular wall and the two flanges of the body form a generally C- or G-shaped structure in cross-section.
18. The lock ring according to claim 1 , wherein a lower flange of the two flanges of the body has a lip formed on an innermost edge thereof, the lip depending below the lower flange.
19. The lock ring according to claim 1 , further comprising:
a lock tab protruding from a portion of the annular wall and having a lock hole formed therethrough; and
a pass-through opening formed in the two walls of the lever,
wherein, when the lever is in the closed position, the lock tab is positioned between the two walls of the lever and the lock hole is aligned with the pass-through opening in the lever.
20. The lock ring according to claim 1 , wherein the body and the lever are formed of molded plastic materials.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/945,876 US20140049057A1 (en) | 2012-07-18 | 2013-07-18 | Lock Ring for Securing a Container Lid |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261672868P | 2012-07-18 | 2012-07-18 | |
US13/945,876 US20140049057A1 (en) | 2012-07-18 | 2013-07-18 | Lock Ring for Securing a Container Lid |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140049057A1 true US20140049057A1 (en) | 2014-02-20 |
Family
ID=49949264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/945,876 Abandoned US20140049057A1 (en) | 2012-07-18 | 2013-07-18 | Lock Ring for Securing a Container Lid |
Country Status (2)
Country | Link |
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US (1) | US20140049057A1 (en) |
WO (1) | WO2014015195A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140054905A1 (en) * | 2012-07-18 | 2014-02-27 | Container International, Inc. | Lock Ring for Securing a Container Lid |
WO2017161073A1 (en) * | 2016-03-16 | 2017-09-21 | Henkel Ag & Co. Kgaa | Battery powered dispenser for one and two component foils and cartridges |
WO2017218754A1 (en) * | 2016-06-16 | 2017-12-21 | Walbro Llc | Liquid and vapor separator |
US9905905B1 (en) * | 2014-09-26 | 2018-02-27 | Tessco Communications Incorporated | Antenna enclosure for attachment to a handrail |
US10249935B2 (en) | 2017-07-30 | 2019-04-02 | Tessco Communications Incorporated | Handrail Wi-Fi enclosure |
US11554903B2 (en) | 2018-09-03 | 2023-01-17 | Container International, Inc. | Container lid and lock ring combination |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105416817B (en) * | 2015-11-30 | 2017-08-25 | 四川德阳市年丰食品有限公司 | It is capable of the enclosuring structure of sealed food |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140054905A1 (en) * | 2012-07-18 | 2014-02-27 | Container International, Inc. | Lock Ring for Securing a Container Lid |
US9905905B1 (en) * | 2014-09-26 | 2018-02-27 | Tessco Communications Incorporated | Antenna enclosure for attachment to a handrail |
WO2017161073A1 (en) * | 2016-03-16 | 2017-09-21 | Henkel Ag & Co. Kgaa | Battery powered dispenser for one and two component foils and cartridges |
WO2017218754A1 (en) * | 2016-06-16 | 2017-12-21 | Walbro Llc | Liquid and vapor separator |
CN109312699A (en) * | 2016-06-16 | 2019-02-05 | 沃尔布罗有限责任公司 | Liquid and steam separator |
US20190178212A1 (en) * | 2016-06-16 | 2019-06-13 | Walbro Llc | Liquid and vapor separator |
US10920723B2 (en) * | 2016-06-16 | 2021-02-16 | Walbro Llc | Liquid and vapor separator |
US10249935B2 (en) | 2017-07-30 | 2019-04-02 | Tessco Communications Incorporated | Handrail Wi-Fi enclosure |
US11554903B2 (en) | 2018-09-03 | 2023-01-17 | Container International, Inc. | Container lid and lock ring combination |
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WO2014015195A1 (en) | 2014-01-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |