Caster block and wheel lock for wheelchair
OwnerJames B. Papacinventor
Life of this patent
Estimating the term…
Abstract
A caster block for receiving a caster wheel for a wheelchair, in which a housing defines a central bore and spaced-apart bores for bolts to connect the caster block to the wheel chair. A resilient core in the central bore defines recesses in opposing distal ends for bearing races. A shaft of a caster wheel extends through the core. A wheel lock for restraining a wheel on the wheel chair has a bottom plate with a flange extending to one side to define a recess between an accurate cavity and a mounting block. An edge of a top plate matingly engages the cavity. The top and bottom plate sandwich a frame member. A handle with a lock arm pivotally connects to the bottom plate. A pin extends from the lock arm, and engages a wheel upon movement of the handle, to secure the wheel from rotation.
Claims3
A caster block attached to a frame of a wheelchair for receiving a caster wheel, comprising:
- a housing having a central bore therethrough and a plurality of spaced-apart bores for receiving bolts for attaching the housing to a frame of a wheelchair;
- a resilient core received in the central bore and defining an axial bore for receiving therethrough a shaft of a caster wheel, the distal ends of the core defining recesses;
- a pair of bearing races received in the recesses,
- whereby the shaft of the caster wheel, being extended through the axial bore in the core, engages the caster wheel to the caster block.
A wheel lock for attaching to a frame member of a wheel chair for restraining a wheel on the wheel chair from rotational, comprising:
- a bottom plate having an flange that defines an arcuate cavity On a side edge and a mounting block on an opposing side, the flange and the mounting block extending outwardly in a first direction from the plate to define a recess therebetween, the block defining a first tapped bore in an upper surface and a pair of bores in a side surface;
- a top plate having an edge that matingly engages the arcuate cavity of the top plate and defining a bore that aligns with the tapped bore for receiving a fastener for securing the top plate to the bottom plate,
- whereby the top plate and the bottom plate, being engaged together, sandwich a frame member within the recess for attaching the wheel lock to a wheelchair,
- a handle pivotally attached to one of the bores in the side surface;
- a lock arm pivotally attached to the other of the bores in the side surface and pivotally engaged to an end of the handle;
- and
- a rigid pin extending laterally from an end of the lock arm,
- whereby moving the handle from a first position to a second position moves the rigid pin from an engaged position against a wheel of a wheelchair to a disengaged position spaced apart from the wheel.
Dependencies are inferred from the claim text.