EP2109484A1

EP2109484A1 - Weight plate with externally actuated internal locking device

Info

Publication number: EP2109484A1
Application number: EP07750347A
Authority: EP
Inventors: Mark Nalley
Original assignee: Individual
Current assignee: CORE HEALTH & FITNESS LLC
Priority date: 2007-02-09
Filing date: 2007-02-09
Publication date: 2009-10-21
Anticipated expiration: 2027-02-09
Also published as: CN101626813B; CN101626813A; EP2109484B1; WO2008097231A1; CA2676722A1; EP2109484A4; CA2676722C; PL2109484T3

Abstract

A weight pfate for use with physical fitness equipment is disclosed including a plate body with a centrally located locking connector and two outwardly disposed throughbores. The body additionally has an internal bore within the thickness of the plate body which communicates with the locking connector. A selector pin is movably mounted within the internal bore to selectively engage the pfate body to a locking connector in an adjacent weight plate. A toggle lever is mounted in a cartridge mounted within the weight plate to selectively position the selector pin.

Description

WEIGHT PLATE WITH EXTERNALLY ACTUATED INTERNAL LOCKING DEVICE

BACKGROUND

1 • Field of the Invention. This invention relates to a weight plate for use with body building equipment, in general, and, more particularly, to a weight plate having a cartridge therein which includes an external toggle lever which actuates an internal mechanical pin to conveniently, safely and simply engage a connection union mounted in or adjacent weight plates.

2. Prior Art. Body building equipment (also referred to as physical fitness equipment or exercise apparatus) often takes many forms to provide the resistance necessary to tear down muscle tissue during an exercise regimen. Many ingenious resistance developing systems or machines have been developed utilizing, for example, systems which incorporate a selectable weight stack. By design, the known equipment allows a user to, within the module, increase weight as the available resistance is incrementally selectable. These systems often promise faster and better results for exercisers. However, despite the advancement of mechanical and/or biomechanics devices which may benefit muscle growth, little effort has been made to simplify and/or make the selectable weight stack safer.

Conventional weight stacks are, typically, multiple layers of metal-based plates which collectively and, generally, amass an aggregate gross amount of weight. Generally, a weight stack includes a plurality of rectangular weight plates, typically about one inch thick and about 10 inches long by 4 inches wide. Each conventional plate incorporates four bore holes therein. Three throughbores pass vertically through the thickness of the plate from the top surface to the bottom surface. The fourth bore hole passes horizontally within the width of the plate (between the top and bottom

surfaces) and intersects the middle one of the three vertical bore holes. Two throughbores engage or receive a pair of spaced-apart guide rods and cause the plate to track vertically thereon.

The middle throughbore accommodates a center post. The typical center post has multiple diametric throughbores to receive a selector pin which passes through the fourth throughbore. Thus, each plate may be independently selected by way of manually inserting a selector pin which is, typically, slightly longer than the width of a plate and has a knob of sorts on one end so that a user may better manipulate the selector pin. The pin is inserted through the fourth throughbore in the plate and a throughbore in the center post to lock the weight plate to the center post for selectively moving that weight plate vertically either up or down, as well as any weight plate supported thereon.

Although traditional weight stacks, such as those described above, have succeeded in carrying out the intended weight lifting purpose, there are many areas for substantial improvement.

One key problem often associated with traditional weight stacks is that the selector pin is removable and, as a result, is often misplaced, stolen or damaged whereupon it is replaced with a functionally and/or structurally inadequately sized pin. This inappropriate replacement historically has caused bodily injury when the system fails due to the violation of the inherent design of the apparatus.

The removable pin also permits the user to easily modify the operation of the apparatus outside the manufacturer's design criteria for the plates and/or weight stack.

Additionally, there is a level of dexterity and hand-to-eye coordination required to effect the insertion of the selector pin in the horizontal throughbαre of the weight and the center post which further limits the true and effective result.

In other weight plates, latch levers are rotated at one of the surfaces of the weight plate to selectively engage a notch or groove formed in the center post or hanger bar as described in U.S. Patent No. 5,306,221 to ftaru. These devices are subject to slippage of the levers unless an extremely complicated system of levers is utilized and precisely locked in position.

Yet other weight plates included sliding plates, described in U.S. Patent No. 772,906 to Reach, which are cams formed in the weight plates to effectively engage lugs on an adjacent weight plate.

These latter devices are subject to targe manufacturing costs and are cumbersome to use as well as having clear safety issues.

Therefore, the need exists for a more manufacturable weight plate having a construction that minimizes confusion on the part of the user, possibility for misuse or failure, yet retains the convenient exchange of weight with a single finger of a human hand. The weight plate of the present invention satisfies this need.

CO-PENDING APPLICATIONS

M. Nalley WEIGHT PLATE WITH EXTERNALLY S.N. 10/970,267

ACTUATED INTERNAL LOCKING DEVICE

M. Nalley WEIGHT STACK APPARATUS S.N. 29/227,244

M. Nalley WEIGHT STACK APPARATUS S.N. 10/868,065

WITH INTERLOCKING DEVICE SUMMARY OF THE INVENTION

The weight plate of the present invention includes a convenient, integrally assembled cartridge with an exterior lever for enabling an internal pin to engage or disengage a connecting union which is attached to the plate.

A weight plate for physical fitness equipment is disclosed including a plate body with a central throughbore for connection and at least one, preferably two, throughbores which pass vertically therethrough for receiving guide rods or the like. The plate body additionally has an internal cavity which includes a horizontal bore disposed intermediate the opposing surfaces of the plate body. Typically, the horizontal bore intersects the central vertical throughbore. A selector pin is movably mounted within the cartridge and passes through the internal bore to selectively engage the plate body to a union or connector which is mounted is the central throughbore of the weight plate. A toggle lever is mounted in the cartridge to selectively position the selector pin within the internal bore. The union (or connector) is adapted to fit snugly within the central throughbore and includes a radial or diametric opening therethrough to selectively engage the selector pin from the cartridge.

The connector comprises a generally stepped conical or cylindrical-pyramidal shape with an end latching eye at one end thereof and an open center thereof to receive the end latching portion of a similar connector therein such that a selection pin engages the union connector body in the weight plate as well as the latching eye of the union in an adjacent weight plate. Thus, the cartridge selector pin is selectively operative to join a weight plate to an adjacent weight plate or a lift apparatus cable or the like. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a partially exploded, perspective view of a weight plate assembly known in the prior art.

Figure 2 is an exploded view of the weight plate apparatus of the instant invention.

Figure 3 is a plan view of the weight plate apparatus shown in Figure 2 in the assembled condition with the locking pin in the locking position.

Figure 4 is a front elevation view of the weight plate apparatus of the instant invention.

Figure 5 is a partially broken away view of the weight plate apparatus of the instant invention taken along the line 5-5 in Figure 3.

Figure 6 is a partially broken away plan view of the bottom surface of the weight plate apparatus of the instant invention showing one embodiment of the cavity and cartridge with the locking pin retracted.

Figure 7 is an enlarged perspective view of the connector portion of the weight plate assembly of the instant invention.

Figure 8 is another view of the connector portion of the weight plate assembly of the instant invention rotated 90° relative to Figure 7.

Figure 9 is an enlarged perspective view of the cartridge of the weight plate apparatus of the instant invention with the locking pin shown in several positions.

DESCRIPTION OF A PREFERRED EMBODIMENT

Referring now to Figure 1 , there is shown a conventional weight plate 100 which is known in the art. Typically, multiple weight plates are used to collectively amass an aggregate gross weight in a weight machine. Generally, a conventional weight plate 100 comprises a rectangular body, typically about one inch thick and about 10 inches long by 4 inches wide. Conventional weight plates incorporate three vertical throughbores 101, 102 and 103 which pass through the thickness of the plate from the top surface 121 to the bottom surface 122. A fourth throughbore 105 passes horizontally through the plate (from the front 123 toward the back between the top and bottom surfaces) and intersects the middle throughbore 103.

In a typical utilization, throughbores 101 and 102 receive a pair of conventional spaced apart guide rods 106 and 107 (shown in dashed outline). This arrangement permits the plate 100 to track vertically on the guide rods.

The middle throughbore 103 accommodates a center post 108 also shown in dashed outline. The center post 108 has multiple diametric throughbores 109 to act as a receptacle for a selector pin 110 which passes through throughbore 105. Each plate 100 may be independently selected by way of manually inserting the selector pin 110 through throughbore 105 and a throughbore 109 in the center post 108 (after moving the weights or the center post vertically up or down) to select a desired weight plate. Selector pin 110 is, typically, slightly longer than the front-to-back width of any one plate and has a suitable knob 110A at one end so that a user may better manipulate the pin.

Although conventional weight stacks, such as those described above, have succeeded in carrying out the intended purpose, there are many areas for substantial improvement. For example, the proper selector pin 110 is frequently misplaced and replaced with a functionally and/or structurally inadequately sized pin. Historically, this inappropriate replacement has caused bodily injury due to the inherent design flaw of the pin which is permitted as a result of the freedom of user to openly circumvent the manufacturer's weight stack design.

Additionally, inasmuch as there is a certain level of dexterity and hand-to-eye coordination required-as well as attention to task - to effect the "engagement" of the selector pin 110 in the throughbore 105 of the weight which further limits the true and effective result. That is, failure to properly insert the selector pin may result in failure of the weight system and possible injury.

Referring now to Figure 2, there is shown an exploded view of the weight plate apparatus 290 of the instant invention. The plate 200 has the traditional rectangular i configuration and is formed from a rigid material, such as iron, steel, urethane, rubber, plastic or a composite material. As an example, a weight plate may have a dimension of 10 inches long by 4 inches wide by 1 inch thick. These dimensions are illustrative only and are not limitative. The shape and size of the plate are subject to design preference. i The plate 200 is similar to the prior art weight plate formed with a middle or central throughbore 203 and two adjacent throughbores 201 and 202. The throughbores 201 and 202 (which may include low friction type bearings 206 and 207, respectively) receive the vertical guide bars (see bars 106 and 107 in Figure 1) which stabilize the selected plate. However, in this invention, the middle throughbore 203 is adapted to I accept a pin receiving connector union 250 which is described infra.

The plate 200 is further formed with an internal cavity 225 at the front edge surface 223 which receives and houses a locking cartridge 500 therein. The cartridge

500 (see infra) is properly sized to permit movement of the toggle (or pin actuator) lever 231 in slot 504 when actuated by moving the end piece 204 at the external end thereof. The toggle lever 231 is pivotally mounted around pivot pin 211 which Is inserted through suitable apertures in cartridge 225 and selectively moves a locking pin 501 (see infra) into aperture 205.

Referring concurrently now to Figures 3 and 4, there are shown a plan view and a front elevation view, respectively, of the weight plate 200.

The preferred rectilinear configuration of weight plate 200 is shown. The throughbores 201 and 202 are shown with the optional bearings 206 and 207 therein, respectively.

The throughbore 203 is shown with the connector 250 inserted therein. The upper surface 253 (see Figure 5) of connector 250 is, typically, flush with the upper surface of the weight plate 200. The connector 250 is, typically, mounted by a force fit into the throughbore 203.

A cavity 260 is formed within the body 251 of the connector 250. The cavity is configured to receive the body portions 251 and 252 (see Figure 2) of an adjacent connector 250 in an adjacent weight plate 200 or a weight cable end piece (not shown).

The cartridge 500 is inserted into the cavity 225 and mounted at the front surface 223 of plate 200. The toggle lever 231 moves through the slot 504 in the cartridge 500 and pivots about the pivot pin 211.

Referring now to Figure 5, there is shown a partially broken away end view of the weight plate 200 with the union 250 mounted therein. As noted, this assembly may be created by a force fit.

It is seen that the upper surface of plate 200 is flush with the upper surface of union 250. The upper lip 253 of the union (or connector) 250 rests upon a shoulder 512 which is formed within the throughbore 203.

One side aperture of union 250, e.g., aperture 257 (see Figure 8), is partially visible at the interior cavity 260 of the union 250. The lower interconnection loop 254 is seen protruding from the bottom of the weight plate 200.

As will be seen in Figure 3, the locking pin 501 in a weight plate apparatus selectively passes through the cavity 260 and aperture 257 therein. In addition, this locking pin passes through the interconnection loop 252 in an adjacent plate 200A (shown in dashed outline) where it is placed in contact with the existing plate shown.

Referring now to Figure β there is shown a bottom plan view of the weight plate apparatus 290 of the instant invention with the connector 250 omitted. The throughbores (or apertures) 201, 202 and 203 are depicted. The cavity 225 is shown communicating with the central throughbore 203 via internal bore 226 which receives locking pin 501 which is mounted in the cavity. Internal bore end 226A is adapted to receive the inner end of locking pin 501 (see Figure 3) after it has passed through the apertures 256 and 257 in the body of connector union 250. Bore 226B is also adapted to receive the outer end of locking pin 501 when the locking pin is withdrawn from the locked position.

Conversely, when, lever 231 is moved to the right (as shown in Figure 9) in slot 504 and internal cavity 225, the locking pin 501 is passed through aperture 203 (and the connector 250 when inserted in the aperture) to securely engage another connector union 250 in an adjacent weight plate 200 or a lift cable connector (as suggested in Figure 2)

Referring concurrently to Figures 7 and 8, there are shown perspective views of the connector unit 250 of the instant invention.

In each of these views, the connector 250 is seen to have a generally cylindrical body 251 which has an outer diameter approximately 1 % inches and a height of approximately 1 inch. These and any other dimensions described herein are not limitative but are representative only. The body 251 also includes an axial cavity 260 which is somewhat elliptical in configuration.

Apertures 256 and 257 are diametrically opposed to each other and pass through the side walls of the body 251 so as to communicate with the cavity 260 in the body 251.

At the upper end of body 251 , the connector 250 includes a rim or lip 253. The lip 253 is approximately 3/8 inch thick and extends radially about 1/8 inch from the outer surface of the body 251. The lip 253 surrounds the body 251 and extends about 1/8 inch above the top surface of body 251.

At the lower end of body 251 , the connector 250 includes a connector loop 252 which is somewhat elliptical in cross-sectional shape. The loop 252 extends about 1 inch below the lower end of the body 251 and includes aperture 255 therethrough.

Loop 252 of connector 250 in a first weight plate is adapted to be received into the cavity 260 of an adjacent connector 260 in a second weight plate of similar design. Thus, a plurality of weight plates in accordance with the instant invention can be selectively engaged. W

1 1

Referring now to Figure 9, there is shown an enlarged representation of the cartridge 500 as used in conjunction with the instant invention.

The cartridge 500 includes an external body 502 which includes an integrally formed front piece 505. The cartridge also includes an internal housing 503 attached to the opposite surface of the front piece 505. The front piece 505 is larger than the opening of cavity 225 and is mounted at the front surface 223 of the weight plate 200. The internal housing 503 is inserted into cavity 225 in the weight plate 200 (see Figure 2). The body 503 is largely secured in the weight plate cavity 225 by friction force although fastening devices such as screws or an adhesive can be used.

The outer housing 502 is, typically, arcuate shaped and includes elongated slot 504 which passes horizontally through the outer surface therein. The slot 504 receives the toggle lever 231 as shown and described herein.

The toggle lever 231 is a generally planar component formed of a suitably strong material such as, but not limited to, stainless steel which inhibits rust and corrosion. The toggle lever 231 is somewhat angulated with planar body portions 601 and 602.

An aperture passes through the body portion 601 in a location (typically at or near the midpoint thereof) advantageously selected to permit proper pivotal rotation of the toggle lever 231 around the swage pin 211 which passes vertically through the body 502 of cartridge 500.

As noted supra, the inner end 602 of toggle lever 231 is inserted through the elongated slot 504 in the front panel 220 and engages a slot in locking pin 501. The locking pin 501 is, typically, made of a strong corrosion resistant material such as, but not limited to, stainless steel. The locking pin 501 is an elongated rod or shaft and is, typically, cylindrical in shape although other configurations are contemplated.

Thus, when toggle lever 231 is rotated around the pivot pin 211 by pushing on knob 204, the locking pin 501 is moved backward or forward within cartridge housing 503 as well as the cavities 226, 226A and 226B in the weight plate 200 (see Figure 6). As the locking pin moves, it is selectively engaged with or disengaged from the union connector which extends into the throughbore 203 to lock or unlock the weight plate 200 relative to an adjacent weight plate.

Coil spring 901 has end 902 thereof engaged with lever body portion 602 within internal housing 503. The other end 903 of coil spring 901 is engaged with the inner portion of internal housing 503, for example at the rear (or bottom) surface thereof as viewed in Figure 6.

Coil spring 901 assures that toggle lever 231 assumes one position (engaged) or the other (disengaged) and prevents the lever from remaining in an indefinite, half-way position. Thus, a fail safe operation is enforced.

While the invention has been particularly shown and described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Thus, there is shown and described a unique design and concept of a weight plate with externally actuated internal locking device. Those skilled in the art will appreciate the many benefits and advantages afforded the present invention. Of significant importance is the ability to easily and safely select a desired weight without need for a center post while maintaining the advantage of providing an integrally formed and uniform system to reduce cost and liability exposure to the consumer. While this description is directed to particular embodiments, it is understood that those skilled in the art may conceive modifications and/or variations to the specific embodiments shown and described herein. Any such modifications or variations which within the purview of this description are intended to be included therein as well. It is understood that the description herein is intended to be illustrative only and is not intended to be limitative. Rather, the scope of the invention described herein is limited only by the claims appended hereto.

Claims

1. A weight plate for physical fitness equipment including, a plate body formed with two adjacent bores passing vertically through said plate body, a connector attached to said plate body intermediate said two bores, at least a portion of said connector extending below the bottom surface of said plate body, an internal bore formed horizontally within said plate body and communicating with said connector, an engagement pin movably mounted within said internal bore, and a lever adapted to move said engagement pin within said internal bore to positively engage a portion of a connector on an adjacent weight plate.

2. The weight plate recited in claim 1 including, a pivot pin for pivotal Iy mounting said lever in said plate body.

3. The weight plate recited in claim 1 including, a cartridge mounted in the side of said plate body to receive said lever in a pivotal mounting.

4. The weight plate for physical fitness according to claim 1 wherein, said body is formed of a metallic material.

5. The weight plate for physical fitness according to claim 1 wherein, said plate body has no exposed holes in the periphery thereof.

6. The weight plate for physical fitness according to claim 1 wherein, said lever extends outwardly from said plate body such that said lever can be activated to either positively engage or disengage said plate body from an adjacent plate body.

7. The weight plate for physical fitness according to claim 1 wherein, said plate body is rectilinear in shape.

8. A weight plate apparatus including, a weight plate formed with an internal cavity and an actuating pin mounted within said cavity which pin may be positively operated by an external lever toggle switch which allows such actuating lever to positively control an internal mechanical pin locking system, and a connector in said weight plate through which said actuating pin is selectively passed by said lever toggle switch.

θ. The weight plate recited jn claim 1 including, resilient means connected to said lever to force said lever into on of two alternative rest position.

10. A weight plate for physical fitness equipment including, a plate body formed with at least two adjacent bores passing vertically through said plate body, a connector attached to said plate body mounted in one of said two bores, at least a portion of said connector extending below the bottom surface of said plate body, said portion of said connector including an engagement loop, an internal bore formed horizontally within said plate body and communicating with said connector, an engagement pin movably mounted within said internal bore, and a spring loaded lever adapted to move said engagement pin within said internal bore to positively engage a engagement loop of a connector on an adjacent weight plate.

11. The weight plate recited in claim 10 including, a cartridge mounted within said plate body to receive said lever in a pivotai mounting.

12. The weight plate recited in claim 11 including, a pivot pin for pivotally mounting said lever in said cartridge.

13. The weight plate recited in claim 10 wherein, said plate body is formed of a metallic material.

14. The weight plate recited in claim 10 wherein, said plate body has no exposed holes in the periphery thereof.

15. The weight plate recited in claim 11 wherein, said lever extends outwardly from said cartridge mounted in said plate body such that said lever can be activated to either positively engage or disengage said plate body from an adjacent plate body by moving said engagement pin.

16. The weight plate recited in claim 10 wherein, said plate body is rectilinear in shape.