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US 5,377,372 AGranted
Hospital bed castor control mechanism
AssigneeHill-Rom, Inc.
InventorsKenneth O. Rudolf, David W. Williams
Life of this patent
Estimating the term…
Abstract
A castor control mechanism for a hospital bed having a plunger type neutral/brake/steer castor comprises a linkage including a rocker arm pivotally mounted to the base of the bed, a link connected on one end to the rocker arm and being connected on its other end through a cam and follower mechanism to a shaft rotatably mounted to the base and rotatable by a foot pedal. Operation of the foot pedal moves the plunger of the castor via the rocker arm to place the castor in its steer, neutral and brake positions.
Claims30
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having a plunger actuatable to provide neutral, brake and steer modes wherein said plunger is not actuated by a cam;
- and
- a linkage for actuating said plunger and selectively positioning said plunger type castor in said neutral, brake and steer modes.
2 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having neutral, brake and steer modes;
- and
- a linkage for selectively positioning said plunger type castor in said neutral, brake and steer modes, wherein said linkage comprises:
- a shaft mounted transversely of and for rotation with respect to said base;
- a rocker arm pivotally mounted to said base and having first and second ends, said first end being adapted to actuate said plunger type castor;
- a link having first and second ends, said first link end being connected to said second rocker arm end;
- and
- means operably associated with said shaft and said second link end for transferring force between said second link end and said shaft;
- whereby upon selective rotation of said shaft said link pivots said rocker arm to selectively position said one plunger type castor in said neutral, brake and steer modes.
8 more elements
For a hospital bed having a base and castors mounted around the base including at least one plunger type castor having neutral, brake and steer modes, a linkage for selectively positioning the plunger type castor in the neutral, brake and steer modes comprising:
- a shaft adapted to be mounted transversely of and for rotation with respect to the base;
- a rocker arm adapted to be pivotally mounted to the base and having first and second ends, said first end being adapted to actuate the plunger type castor;
- a link having first and second ends, said first link end being connected to said second rocker arm end;
- and
- means operably associated with said shaft and said second link end for transferring force between said second link end and said shaft;
- whereby upon selective rotation of said shaft said link pivots said rocker arm to selectively position the plunger type castor in the neutral, brake and steer modes.
3 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having a plunger actuatable to provide neutral and brake modes wherein said plunger is not actuated by a cam;
- and
- a linkage for actuating said plunger and selectively positioning said plunger type caster in said neutral and brake modes, said linkage being operable to translate said plunger but not rotate said plunger.
2 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having neutral and brake modes;
- and
- a linkage for selectively positioning said plunger type caster in said neutral and brake modes, wherein said linkage comprises:
- a shaft mounted transversely of and for rotation with respect to said base;
- a rocker arm pivotally mounted to said base and having first and second ends, said first end being adapted to actuate said plunger type caster;
- a link having first and second ends, said first link end being connected to said second rocker arm end;
- and
- means operably associated with said shaft and said second link end for transferring force between said second link end and said shaft;
- whereby upon selective rotation of said shaft said link pivots said rocker arm to selectively position said one plunger type castor in said neutral and brake modes.
8 more elements
For a hospital bed having a base and castors mounted around the base including at least one plunger type castor having neutral and brake modes, a linkage for selectively positioning the plunger type castor in the neutral and brake modes comprising:
- a shaft adapted to be mounted transversely of and for rotation with respect to the base;
- a rocker arm adapted to be pivotally mounted to the base and having first and second ends, said first end being adapted to actuate the plunger type castor;
- a link having first and second ends, said first link end being connected to said second rocker arm end;
- and
- means operably associated with said shaft and said second link end for transferring force between said second link end and said shaft;
- whereby upon selective rotation of said shaft said link pivots said rocker arm to selectively position the plunger type castor in the neutral and brake modes.
3 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having a plunger actuatable to provide neutral, brake and steer modes;
- and
- a linkage for selectively positioning said plunger type castor in said neutral, brake and steer modes, said linkage including a rocker arm for applying a downward force on said plunger.
2 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having a plunger actuatable to provide neutral and brake modes;
- and
- a linkage for selectively positioning said plunger type castor in said neutral and brake modes, said linkage including a rocker arm for applying a downward force on said plunger.
2 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having a plunger actuatable to provide neutral, brake and steer modes;
- and
- a linkage for selectively positioning said plunger type castor in said neutral, brake and steer modes, said linkage including an arm having and end for applying a downward force directly on said plunger.
2 more elements
A hospital bed comprising:
- a base;
- a patient support mounted above said base;
- castors mounted around said base and including at least one plunger type castor having a plunger actuatable to provide neutral and brake modes;
- and
- a linkage for selectively positioning said plunger type castor in said neutral and brake modes, said linkage including an arm having and end for applying a downward force directly on said plunger.
2 more elements
Dependencies are inferred from the claim text.