US20150272795A1 - Support Arrangement with Activation Mechanism - Google Patents
Support Arrangement with Activation Mechanism Download PDFInfo
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- US20150272795A1 US20150272795A1 US14/736,368 US201514736368A US2015272795A1 US 20150272795 A1 US20150272795 A1 US 20150272795A1 US 201514736368 A US201514736368 A US 201514736368A US 2015272795 A1 US2015272795 A1 US 2015272795A1
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- United States
- Prior art keywords
- pin
- support arrangement
- patient support
- medical patient
- stable position
- 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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1005—Wheelchairs having brakes
- A61G5/101—Wheelchairs having brakes of the parking brake type, e.g. holding the wheelchair
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1005—Wheelchairs having brakes
- A61G5/1013—Wheelchairs having brakes engaging the wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0078—Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/04—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
- B60T11/046—Using cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
- B62B5/0433—Braking mechanisms; Locking devices against movement foot operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
- B62B5/0457—Braking mechanisms; Locking devices against movement by locking in a braking position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
- B62B9/08—Braking mechanisms; Locking devices against movement
- B62B9/082—Braking mechanisms; Locking devices against movement foot operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
- B62B9/08—Braking mechanisms; Locking devices against movement
- B62B9/087—Braking mechanisms; Locking devices against movement by locking in a braking position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/28—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged apart from the brake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/60—Cables or chains, e.g. Bowden cables
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Public Health (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Handcart (AREA)
Abstract
A support arrangement having an activation mechanism to control the movement of wheels is provided. The support arrangement includes a platform, a chassis attached to the platform, a pair of wheel assemblies movably coupled to the chassis, and the activation mechanism. The pair of wheel assemblies are operable between a first state and a second state. The activation mechanism includes a track having a first stable position and a second stable position spaced along a length of the track, and a pin configured to travel along the track. Wheels are in the first state when the pin is in the first stable position and are in the second state when the pin is in the second stable position.
Description
- This application is a continuation of pending U.S. patent application Ser. No. 13/650,255, which was filed on Oct. 12, 2012 and entitled Braking Mechanism, the entire disclosure of which is hereby incorporated herein by reference.
- Not applicable.
- The present invention relates to a brake activation mechanism, more particularly, to a brake activation mechanism for movable furniture, such as chairs, beds, tables and the like. Although the following discussion relates to movable chairs, the present invention extends to all pieces of movable furniture on wheels.
- Wheels are used on movable furniture, such as chairs, to allow for easy movement of the chair even while a person is seated in it. It is often desired to lock the wheels to secure the movable furniture when it is not being moved by a user. For example, a chair is equipped with caster wheels to allow a healthcare professional or other caretaker to easily move furniture, but locked casters are desired when a person is getting in and out of the chair or when the chair and person are not attended by a healthcare professional or other caretaker. Accordingly, pieces of movable furniture with casters may also include a braking mechanism. Users of the movable chairs, beds, and tables require a fast and simple way to activate and deactivate these caster brakes.
- For example in healthcare, caretakers have faced a number challenges when dealing with movable furniture. One of those challenges has been the need to bend down to activate and deactivate the braking mechanism, and not having a stable hold on the chair, bed, or table while doing so. This is inconvenient for both caretakers and patients alike.
- Caretakers often are not able to activate and deactivate the braking mechanism on both sides of the piece of furniture. This is inconvenient for the caretakers, and can create difficulties when transferring patients in and out of a movable chair because the activation device may be between the chair and another piece of furniture or too close to a wall, and therefore not accessible. Furthermore, braking mechanisms having one lever to activate the caster brakes and another lever to deactivate the caster brakes are cumbersome and confusing to users, especially in emergency situations.
- Thus, a brake activation mechanism that allows a user to maintain a hold on a piece of movable furniture during activation and to access an activation/deactivation pedal from both sides of the furniture is activated is desired.
- In one embodiment of the present invention, a braking mechanism operably engages at least one wheel and can transition the at least one wheel between unlocked and locked states. The braking mechanism includes a flipper and a cam. The flipper includes a discontinuous track having an open slot portion and a surface path portion. The open slot portion includes a home position and an engaged position. The cam includes a pin which cooperatively moves along the discontinuous track. In the unlocked state, the pin is located in the home position. As the at least one wheel transitions from the unlocked state to the locked state, the pin moves along the open slot portion from the home position to the engaged position. As the at least one wheel transitions from the locked state to the unlocked state, the pin moves along the open slot portion and then along the surface path portion from the engaged position to the home position.
- In another embodiment of the present invention, a braking mechanism includes at least one pedal, a connecting rod, a flipper, a cam, a cable junction and cables. The at least one pedal is fixed to an end of the connecting rod. The flipper is movable in X, Y and Z-directions and includes a discontinuous track. The cam is attached to the connecting rod and includes a pin cooperatively movable within the discontinuous track. The cable junction is attached to the connecting rod. Each cable includes one end attached to the cable junction and a second end engaging a brake.
- In yet another embodiment of the present invention, a supporting platform includes a chassis, a plurality of wheels attached to an underside of the chassis, and a mechanism operatively connected to the plurality of wheels. Each wheel includes a brake and the mechanism is capable of transitioning the wheels between locked and unlocked states. The mechanism includes a connecting rod, an activation subassembly and a cable junction attached to the connecting rod, and a pedal fixed to a connecting rod end. The activation subassembly includes a plate fixed to the chassis, a flipper having a discontinuous track, a spring biased rod pivotally connecting the plate and flipper, and a cam fixed to the connecting rod. The cam includes a pin which cooperatively travels within the discontinuous track.
- The foregoing and other items and advantages of the present invention will be appreciated more fully from the following figures, where like reference characters designate like features in which:
-
FIG. 1 is a perspective view of the braking activation mechanism in one embodiment of the invention, the brake activation mechanism including a cable junction and an activation subassembly; -
FIG. 2 is a perspective view of the braking activation mechanism ofFIG. 1 attached to a movable chassis; -
FIG. 3 is a top perspective view of the cable junction of the braking activation mechanism ofFIG. 1 ; -
FIG. 4 is a side view of the cable junction ofFIG. 3 when the braking activation mechanism is in an unlocked state; -
FIG. 5 is a side view of the cable junction ofFIG. 3 when the braking activation mechanism is in a locked state; -
FIG. 6 is a side perspective view of a portion ofFIG. 2 , showing a braked caster; -
FIG. 7 is a side perspective view of the activation subassembly of the braking activation mechanism ofFIG. 1 , the activation subassembly including a pin and a discontinuous track; -
FIG. 8 is a top view of the activation subassembly ofFIG. 7 ; -
FIG. 9 is a schematic side view of the activation subassembly ofFIG. 7 , where the braking activation mechanism is in the unlocked stated and the pin is in a home position of the discontinuous track; -
FIG. 10 is a schematic side view of the activation subassembly ofFIG. 7 , where the braking activation mechanism is being activated and the pin is in a first temporary stop position of the discontinuous track; -
FIG. 11 is a schematic side view of the activation subassembly ofFIG. 7 , where the braking activation mechanism is in the locked state and the pin is in an engaged position of the discontinuous track; -
FIG. 12 is a schematic side view of the activation subassembly ofFIG. 7 , where the braking activation mechanism is being activated and the pin is in a second temporary stop position of the discontinuous track; -
FIG. 13 is a schematic side view of the activation subassembly ofFIG. 7 , where the braking activation mechanism is being activated and the pin is traveling along a surface path portion of the discontinuous track; -
FIG. 13A is a cutaway end view of the activation subassembly ofFIG. 13 ; -
FIG. 14 is a schematic side view of the activation subassembly ofFIG. 7 , where the braking activation mechanism is in the unlocked stated and the pin is in the home position of the discontinuous track; and -
FIG. 14A is a cutaway end view of the activation subassembly ofFIG. 14 . - For purposes of description herein, it is to be understood that the specific devices illustrated in the attached drawings, and described below are simply exemplary embodiments of the invented concepts. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting. Also, components described hereinafter as making up various elements of the invention are intended to be illustrative and not limiting. Many suitable components that would perform the same or similar functions as the components described herein are intended to be considered within the scope of the invention.
- Referring to
FIG. 1 , the presentbrake activation mechanism 10 includes a connectingrod 12 having afirst end 14 and asecond end 16; at least onepedal 18 attached to the connecting rod; acable junction 20 and anactivation sub assembly 22. As illustrated inFIG. 2 , thebrake activation mechanism 10 can be attached to achassis 24. Thechassis 24 can be attached to a supporting platform of a chair, a bed, a table, or any other movable product. - Referring to
FIGS. 1 and 2 , the connectingrod 12 may be any shape, but preferably includes at least one planar surface. In one embodiment, the connectingrod 12 is a tube having a square cross section. The connectingrod 12 is attached to achassis 24 and spans a width of the chassis. In an exemplary embodiment, the connectingrod 12 is attached to an underside of thechassis 24. At least onepedal 18 is fixed to an end of the connectingrod 12 and preferably, apedal 18 is fixed to thefirst end 14 of the connectingrod 12 and a pedal is fixed to thesecond end 16 of the connecting rod. Thepedal 18 extends slightly from underneath a side of thechassis 24. The pedal may be any shape, but preferably has a flat paddle shape for easy foot access. In an exemplary embodiment, thecable junction 20 andactuation subassembly 22 are positioned toward opposite ends 14, 16 of the connectingrod 12. However, thecable junction 20 andactivation subassembly 22 can be positioned anywhere on the connectingrod 12. - Now referring to FIGS. 1 and 3-6, the
cable junction 20 holds a plurality ofbrake cables 21 and includes a firstcable holding portion 26 and a secondcable holding portion 28. The firstcable holding portion 26 of thecable junction 20 includesslits 30 at a top edge and fastening apertures at a bottom end. First ends 31 of the plurality ofbrake cables 21 fit in theslits 30 and are held there.Fasteners 32, such as bolts, pass through the fastening apertures at the bottom end of the firstcable holding portion 26 to secure the first cable holding portion of thecable junction 20 to the connectingrod 12. The secondcable holding portion 28 of thecable junction 20 includes a V-shapedplate 34 and an adjacent attached L-shapedbracket 36. The V-shapedplate 34 is attached to thechassis 24 byfasteners 38, such as bolts, and is apertured to contain abearing 40 that surrounds the connectingrod 12 at a first bearing point. The L-shapedbracket 36 containsnotches 42 for supporting brakecable end fittings 44 through which the plurality ofbrake cables 21 pass. Aspring 46 having afirst end 48 and asecond end 50 is connected at itsfirst end 48 to the firstcable holding portion 26 and at itssecond end 50 to the secondcable holding portion 28. As illustrated inFIG. 6 , second ends 52 of the plurality ofbrake cables 21 are operatively attached to a plurality ofbrakes 54. In a preferred embodiment, thebrakes 54 are attached to wheels such ascasters 56. - As illustrated in
FIGS. 7 and 8 , theactivation subassembly 22 includes aplate 58, acam 60, aflipper 64 having adiscontinuous track 66 andramp 68. Theplate 58 is fixed to thechassis 24 byfasteners 70, such as bolts, and apertured to contain abearing 72 that surrounds the connectingrod 12 at a second bearing point. Theplate 58 further includes aguide rod 74, aspring connection rod 76, and aspring 77 biasedrod 78. Theguide rod 74 protrudes from a center of theplate 58 towards the center of thebrake activation mechanism 10. Thespring connection rod 76 protrudes from an upper portion of theplate 58 away from the center of themechanism 10. Thespring 77 biasedrod 78 protrudes from theplate 58 toward the center of themechanism 10. - Referring to
FIG. 7 , thecam 60 includes atab 80 at its lower end, apin 82 at its upper end, and aguide track 84 proximate its center. Thetab 80 is apertured to allowfasteners 86, such as bolts, to pass there through and fix thecam 60 to the connectingrod 12. Thepin 82 protrudes from thecam 60 towards the center of themechanism 10. Thepin 82 travels along a path defined by thediscontinuous track 66 of theflipper 64. Theguide track 84 houses theguide rod 74 that is fixed to theplate 58. Theguide rod 74 moves in theguide track 84 to maintain the position of thecam 60 relative to theplate 58. - Still referring to
FIG. 7 , theflipper 64 includes anupper portion 88 and alower portion 90. Thelower portion 90 of theflipper 64 is positioned at the upper end of thecam 60 on the side of the cam that is closest to the center of themechanism 10. Thelower portion 90 includes thediscontinuous track 66, theramp 68, and an aperture. Thespring 77 biasedrod 78 protruding from theplate 58 passes through the aperture to loosely and pivotably connect theflipper 64 to the plate. Thediscontinuous track 66 is a complete and closed loop including two types of track, namely anopen slot portion 92 and asurface path portion 94. Theopen slot portion 92 of thediscontinuous track 66 includes ahome position 96 and bends which define a firsttemporary stop position 98, anengaged position 100 and a secondtemporary stop position 102. Thehome position 96, firsttemporary stop position 98, engagedposition 100 and secondarytemporary stop position 102 function as stop points for thepin 82. Thehome position 96 is located at one end of theopen slot portion 92 of thediscontinuous track 66 and theramp 68 is located at an opposite end of the open slot portion. Theramp 68 operates to transition thepin 82 from theopen slot portion 92 to thesurface path portion 94 of thediscontinuous track 66. Thesurface path portion 94 is defined by a route connecting theramp 68 andhome position 96 in theopen slot portion 92. Thesurface path portion 94 is located on a planar surface of thelower portion 90 of theflipper 64 which faces theplate 58. Theupper portion 88 of theflipper 64 is positioned over thecam 60 and theplate 58, away from the center of themechanism 10. As best illustrated inFIG. 8 , aspring 104 connects theplate 58spring connection rod 76 to theflipper 64upper portion 88. In particular, afirst end 106 ofspring 104 engages thespring connection rod 76 and asecond end 108 engages theupper portion 88. - When the
brake activation mechanism 10 is deactivated, thechassis 24 is movable and the at least onepedal 18 is parallel with the floor. The first and secondcable holding parts cable junction 20 are perpendicular to the floor and parallel to each other as illustrated inFIG. 4 . Referring toFIG. 9 , thepin 82 is in thehome position 92 in thediscontinuous track 66 of theflipper 64. - To activate the
brake activation mechanism 10, a user depresses apedal 18. Thepedal 18 rotates downward relative to the connectingrod 12 forming an acute angle with the floor. Where there is a pedal 18 located on opposite sides of the chassis, the user only needs to push one of the pedals which causes both pedals to rotate downward. For clarity, activation and deactivation of the brake activation mechanism are described in terms of one pedal, but it is to be understood that the mechanism may include two pedals. Because thepedal 18 is fixed to the connectingrod 12, the connecting rod also rotates. As the connectingrod 12 rotates, thecam 60 which is fixed to the connecting rod, also rotates. As illustrated inFIGS. 9-14 , rotation of thecam 60 causes thepin 82 to move along thediscontinuous track 66 of theflipper 64. First, the user steps on thepedal 18, which moves thepin 82 from the home position 96 (FIG. 9 ) to a first temporary stop position 98 (FIG. 10 ) in theopen slot portion 92 of thediscontinuous track 66, thereby stretching thespring 104 between theflipper 64 and theplate 58. The stretch of thespring 104 and movement of the spring over theplate 58 provides audible feedback to the user to signal that thebrake activation mechanism 10 will engage. Concomitantly, the firstcable holding portion 26 of thecable junction 20, which is fixed to the connectingrod 12, also rotates with thepedal 18 and connecting rod. The firstcable holding portion 26 rotates away from the secondcable holding portion 28 of thecable junction 20, thereby creating an obtuse angle between the lower ends of the first and second cable holding portions. When the user then removes his or her foot from thepedal 18, the pedal slightly rotates back up away from the floor, but still maintains a rotated position relative to the floor. As thepedal 18 rotates slightly back, the connectingrod 12 also rotates slightly, which causes thepin 82 on thecam 60 to snap up from the first temporary stop position 98 (FIG. 10 ) to the engaged position 100 (FIG. 11 ). The firstcable holding portion 26 of thecable junction 20 remains angled away from the secondcable holding portion 28, thereby forming an obtuse angle between the lower ends of the first and second cable holding portions and holding tension in the plurality ofbraking cables 21. Tension in the plurality ofbraking cables 21 causes thebrakes 54 to be activated and lock thecaster wheels 56. The rotated position of the at least onepedal 18 is a visible indication to the user that thebrakes 54 are engaged and thecaster wheels 56 are locked. In one embodiment, threecaster wheels 56 are equipped withbrakes 54 to prevent any movement of thechassis 24 when the brakes are engaged. - To deactivate the
brake activation mechanism 10, the user again steps downward onpedal 18. This downward motion rotates thecam 60 with the connectingrod 12 causing thepin 82 to move out of the engaged position 100 (FIG. 11 ) in theopen slot portion 92 of thediscontinuous track 66 and to a second temporary stop position 102 (FIG. 12 ). Movement of thepin 82 on thecam 60 to the secondtemporary stop position 102 stretches thespring 104 between theflipper 64 and theplate 58, which again provides audible feedback to the user to signal the deactivation of thebrake activation mechanism 10. When the user removes their foot from thepedal 18, thepedal 18 rotates up away from the floor which causes the connectingrod 12 to rotate, thereby rotating thecam 60. The rotatingcam 60 moves thepin 82 through theopen slot portion 92 of thediscontinuous track 66 toward theramp 68. Referring toFIG. 13A , when thepin 82 contacts theramp 68, the ramp forces theflipper 64 to translate on thespring 77 biasedrod 78 away from thepin 82,cam 60, andplate 58. Thepin 82 travels up theramp 68, behind the flipper and onto thesurface path portion 94 of the discontinuous track 66 (FIG. 13 ), and returns to the home position 96 (FIG. 14 ). As soon as thepin 82 reaches thehome position 96, thespring 77 between theflipper 64 and theplate 58 forces the flipper back into alignment with the pin in its home position (FIGS. 14 and 14A ). The firstcable holding portion 26 of thecable junction 20 also returns to its deactivated position of being perpendicular to the floor releasing tension in the plurality ofbraking cables 21. Release of the tension in the plurality ofbraking cables 21 causes thebrakes 54 to be deactivated and unlock thecaster wheels 56. The unrotated position of the at least onepedal 18 is a visible indication to the user that thebrakes 54 are disengaged and thecaster wheels 56 are unlocked. - As described in detail above, the
flipper 64 is adapted to include three degrees of motion which facilitates movement of thepin 82 along thediscontinuous track 66. As illustrated inFIGS. 9-12 , theflipper 64 moves in an X-Y direction parallel to plate 58 as thepin 82 travels along theopen slot portion 92 of thediscontinuous track 66. As illustrated inFIGS. 13 and 13A , when thepin 82 contacts theramp 68 and travels along thesurface path portion 94 of thediscontinuous track 66, theflipper 64 additionally translates in a Z-direction away fromplate 58. Movement in the Z-direction is limited byupper portion 88 of theflipper 64 coming into contact withplate 58. Referring toFIGS. 14 and 14A , when thepin 82 reacheshome position 96, theflipper 64 again translates in a Z-direction toward theplate 58.
Claims (30)
1. A medical patient support arrangement, comprising:
a platform configured to support a patient;
a chassis attached to the platform;
a pair of wheel assemblies laterally spaced from one another across a width of the chassis and movably coupled to the chassis, the pair of wheel assemblies operable between a first state and a second state different from the first state; and
an activation mechanism that controls the movement of each of the wheels of the pair of wheels with respect to the chassis, the activation mechanism including a track having a first stable position and a second stable position spaced along a length of the track, the activation mechanism further including a pin configured to travel along the track, wherein each of the wheels of the pair of wheels is in the first state when the pin is in the first stable position and each of the wheels of the pair of wheels is in the second state when the pin is in the second stable position.
2. The medical patient support arrangement of claim 1 , wherein the movement of the pair of wheels assembly is a rolling movement.
3. The medical patient support arrangement of claim 2 , wherein the first state is a rotationally unlocked state and the second state is a rotationally locked state.
4. The medical patient support arrangement of claim 1 , wherein the pin is spring biased into the first stable position.
5. The medical patient support arrangement of claim 4 , wherein the pin is spring biased into the second stable position.
6. The medical patient support arrangement of claim 1 , wherein the pin travels through a continuous loop.
7. The medical patient support arrangement of claim 6 , wherein the track is discontinuous.
8. The medical patient support arrangement of claim 1 , further comprising:
a movable input member adapted to receive an input from an operator, the input member operably coupled to the activation mechanism to move the pin between the first and second stable positions.
9. The medical patient support arrangement of claim 8 , wherein a first input to the input member from the operator moves the pin along the track from the first stable position toward the second stable position.
10. The medical patient support arrangement of claim 9 , wherein a second input to the input member from the operator moves the pin along the track from the second stable position toward the first stable position.
11. The medical patient support arrangement of claim 10 , wherein the activation mechanism is configured such the input mechanism is moved in the same direction for the first input and the second input.
12. A medical patient support arrangement, comprising:
a platform configured to support a patient;
a chassis attached to the platform;
a pair of wheel assemblies laterally spaced from one another across a width of the chassis and movably coupled to the chassis, the pair of wheel assemblies operable between a first state and a second state different from the first state;
an activation mechanism that controls the movement of each of the wheels of the pair of wheels with respect to the chassis, the activation mechanism including a track having a first stable position and a second stable position spaced along a length of the track, the activation mechanism further including a pin configured to travel along the track, wherein each of the wheels of the pair of wheels is in the first state when the pin is in the first stable position and each of the wheels of the pair of wheels is in the second state when the pin is in the second stable position; and
a movable foot pedal adapted to receive an input from an operator, the foot pedal operably coupled to the activation mechanism to move the pin between the first and second stable positions, wherein the foot pedal partially extends from beneath the chassis and is substantially parallel with a floor surface when the pin is in the first stable position.
13. The medical patient support arrangement of claim 12 , wherein the foot pedal forms an acute angle with a floor surface when the pin is in the second stable position.
14. The medical patient support arrangement of claim 12 , wherein the foot pedal is one of a pair of foot pedals, and wherein the pair of foot pedals are laterally spaced from one another across the width of the chassis.
15. The medical patient support arrangement of claim 1 , wherein the medical patient support arrangement comprises a chair.
16. A medical patient support arrangement, comprising:
a platform configured to support a patient;
a chassis attached to the platform;
one or more wheel assemblies coupled to the chassis and operable between a locked state where a wheel of the one or more wheel assemblies is locked from rotation, and an unlocked state where the wheel is free to rotate; and
an activation mechanism that controls the operation of the one or more wheel assemblies, the activation mechanism including a track having a first stable position and a second stable position spaced along a length of the track, the activation mechanism further including a pin configured to travel along the track, wherein each of the wheel is in the unlocked state when the pin is in the first stable position and the wheel is in the locked state when the pin is in the second stable position.
17. The medical patient support arrangement of claim 16 , wherein the pin is spring biased into the first stable position.
18. The medical patient support arrangement of claim 17 , wherein the pin is spring biased into the second stable position.
19. The medical patient support arrangement of claim 16 , wherein the pin travels through a continuous loop.
20. The medical patient support arrangement of claim 19 , wherein the track is discontinuous.
21. The medical patient support arrangement of claim 16 , further comprising:
a movable input member adapted to receive an input from an operator, the input member operably coupled to the activation mechanism to move the pin between the first and second stable positions.
22. The medical patient support arrangement of claim 21 , wherein a first input to the input member from the operator moves the pin along the track from the first stable position toward the second stable position.
23. The medical patient support arrangement of claim 22 , wherein a second input to the input member from the operator moves the pin along the track from the second stable position toward the first stable position.
24. The medical patient support arrangement of claim 23 , wherein the activation mechanism is configured such the input mechanism is moved in the same direction for the first input and the second input.
25. The medical patient support arrangement of claim 21 , wherein the input member is a foot pedal.
26. The medical patient support arrangement of claim 25 , wherein the foot pedal partially extends from beneath the chassis.
27. The medical patient support arrangement of claim 26 , wherein the foot pedal is substantially parallel with a floor surface when the pin is in the first stable position.
28. The medical patient support arrangement of claim 27 , wherein the foot pedal forms an acute angle with a floor surface when the pin is in the second stable position.
29. The medical patient support arrangement of claim 25 , wherein the foot pedal is one of a pair of foot pedals, and wherein the pair of foot pedal are laterally spaced from one another across the a width of the chassis.
30. The medical patient support arrangement of claim 16 , wherein the medical patient support arrangement comprises a chair.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/736,368 US20150272795A1 (en) | 2012-10-12 | 2015-06-11 | Support Arrangement with Activation Mechanism |
US14/872,724 US9579241B2 (en) | 2012-10-12 | 2015-10-01 | Support arrangement with activation mechanism |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/650,255 US9074648B2 (en) | 2012-10-12 | 2012-10-12 | Braking mechanism |
US14/736,368 US20150272795A1 (en) | 2012-10-12 | 2015-06-11 | Support Arrangement with Activation Mechanism |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/650,255 Continuation US9074648B2 (en) | 2012-10-12 | 2012-10-12 | Braking mechanism |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/872,724 Continuation-In-Part US9579241B2 (en) | 2012-10-12 | 2015-10-01 | Support arrangement with activation mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150272795A1 true US20150272795A1 (en) | 2015-10-01 |
Family
ID=50474396
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/650,255 Expired - Fee Related US9074648B2 (en) | 2012-10-12 | 2012-10-12 | Braking mechanism |
US14/736,368 Abandoned US20150272795A1 (en) | 2012-10-12 | 2015-06-11 | Support Arrangement with Activation Mechanism |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/650,255 Expired - Fee Related US9074648B2 (en) | 2012-10-12 | 2012-10-12 | Braking mechanism |
Country Status (1)
Country | Link |
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US (2) | US9074648B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180346008A1 (en) * | 2015-11-25 | 2018-12-06 | Medtech Sa | Mechanical system for stabilization of vehicles on castors |
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US9579241B2 (en) | 2012-10-12 | 2017-02-28 | Steelcase Inc. | Support arrangement with activation mechanism |
US9918888B2 (en) * | 2014-03-21 | 2018-03-20 | Medline Industries, Inc. | Locking mechanism with pivotable foot actuation lever |
US9944121B2 (en) * | 2015-08-24 | 2018-04-17 | Darcor Limited | Dual end remote swivel-lock for caster carts and carts equipped with same |
US11197791B2 (en) | 2018-11-21 | 2021-12-14 | Stryker Corporation | Patient transport apparatus with cable connected brake and steer lock assemblies |
US11324648B2 (en) | 2018-11-21 | 2022-05-10 | Stryker Corporation | Patient transport apparatus with steer lock assembly |
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US10640136B2 (en) * | 2015-11-25 | 2020-05-05 | Medtech S.A. | Mechanical system for stabilization of vehicles on castors |
Also Published As
Publication number | Publication date |
---|---|
US9074648B2 (en) | 2015-07-07 |
US20140102834A1 (en) | 2014-04-17 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: STEELCASE INC., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SPOOR, TRAVIS;REEL/FRAME:035821/0368 Effective date: 20150609 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |