Abstract: An adjustable wheelchair includes a base frame having a first guide portion defining a first arcuate channel, and a seat frame having a second guide portion defining a second arcuate channel confronting the first arcuate channel. A first bearing assembly is secured to a front end of the first arcuate channel and extends into bearing engagement with the second arcuate channel. A rear bearing assembly is secured to a rear end of the second arcuate channel and extends into bearing engagement with the first arcuate channel. The seat frame is slideable in an arcuate path defined by the first and second arcuate channels for adjustment of a tilt angle of the seat frame with respect to the base frame.

Abstract: An adjustable wheelchair includes a base frame having a first guide portion defining a first arcuate channel, and a seat frame having a second guide portion defining a second arcuate channel confronting the first arcuate channel. A first bearing assembly is secured to a front end of the first arcuate channel and extends into bearing engagement with the second arcuate channel. A rear bearing assembly is secured to a rear end of the second arcuate channel and extends into bearing engagement with the first arcuate channel. The seat frame is slideable in an arcuate path defined by the first and second arcuate channels for adjustment of a tilt angle of the seat frame with respect to the base frame.

Abstract: An adjustable wheelchair includes a base frame having a first guide portion defining a first arcuate channel, and a seat frame having a second guide portion defining a second arcuate channel confronting the first arcuate channel. A first bearing assembly is secured to a front end of the first arcuate channel and extends into bearing engagement with the second arcuate channel. A rear bearing assembly is secured to a rear end of the second arcuate channel and extends into bearing engagement with the first arcuate channel. The seat frame is slideable in an arcuate path defined by the first and second arcuate channels for adjustment of a tilt angle of the seat frame with respect to the base frame.

Abstract: An adjustable seating frame assembly includes a side frame member, first and second joint members, a footrest hanger, a pivot fastener and a lock fastener. The first joint member is affixed to the side frame member and includes a first pivot aperture and at least one first lock aperture. The second joint member is affixed to the footrest hanger and includes a second pivot aperture and at least one second lock aperture. The pivot fastener is secured through the first and second pivot apertures to pivotally attach the second joint member to the first joint member. The lock fastener is secured through a selected one of the at least one first lock aperture and a selected one of the at least one second lock aperture to secure the second joint member in a selected one of a plurality of angular positions with respect to the first joint member.

Abstract: Embodiments of a retainer assembly are provided. The retainer assembly includes, for example, a bracket that partially surrounds a part or component and a latching component pivotally attached to the bracket. The latching component and frame bracket retain the part or component to a portion of the wheelchair frame when the latching component is located in the closed position.

Abstract: A leg rest assembly includes an elevating member for supporting a user's leg, which is adapted to move in a first and second direction. The leg rest assembly also includes a mechanism that can be selectively engaged and disengaged. The elevating member is adapted to freely move in the first direction and is prevented from moving in the second direction when the mechanism is engaged, and is adapted to freely move in both the first and second directions when the mechanism is disengaged.

Abstract: A wheelchair wheel locking system reduces the likelihood that a wheel will inadvertently disengage from the wheelchair. An axle is attached to the wheel and has a protrusion for engaging annular grooves within a wall forming an inner passage through an axle receptor attached to the wheelchair. The axle is inserted in an axial direction into the inner passage and has a first locked position in which the axle is fully engaged with the axle receptor, and a second locked position in which the axle is partially engaged with the axle receptor. If a quick release lock is inadvertently released by, for example, pressing a release button, the protrusion retracts and disengages from a first annular groove within the wall of the axle receptor, the axle may start to move axially relative to the axle receptor to a position in which the wheel will disengage from the wheelchair.

Abstract: A wheelchair has a reclining seat that has a back portion and a bottom portion. The wheelchair also has a frame, which has a lower portion onto which wheels are attached and a substantially vertical portion extending upwardly from the lower portion. The back of the seat is attached to the substantially vertical portion of the frame. The wheelchair has a first mode for normal seating in which the substantially horizontal lower portion supports the bottom portion of the seat. The seat also has a second, reclined mode in which the seat is reclined backwardly relative to the normal position. The bottom and back portions of the seat and the substantially vertical portion of the frame are rotated together to tilt the seat into the reclined position. The lower portion of the seat is pivotally mounted on the lower portion of the frame, such that the lower portion of the frame remains substantially in place as the seat itself is tilted, and does not tilt with the seat.

Abstract: A sideframe for a wheelchair has a top frame and a separate bottom frame. An axle plate extends between and is attached to both said top and bottom frames. A caster plate is attached to the sideframe. The top frame and the bottom frame are removably attached to one another. In particular embodiments of the invention, the top and bottom frames each comprise a plurality of bolt apertures. The axle plate and the axle extension plate may each comprise a plurality of bolt apertures. The sideframe may support a rear-mounted major wheel, with the axle plate being to the rear of the sideframe and the caster plate being in the front of the sideframe. Alternatively, the sideframe may support a front-mounted major wheel, with the axle plate being to the front of the sideframe and the caster plate being to the rear. To mount the top frame to the bottom frame, the top frame may have a downwardly extending portion with a concave end piece extending therefrom.

Abstract: A wheelchair wheel locking system reduces the likelihood that a wheel will inadvertently disengage from the wheelchair. An axle is attached to the wheel and has a protrusion for engaging annular grooves within a wall forming an inner passage through an axle receptor attached to the wheelchair. The axle is inserted in an axial direction into the inner passage and has a first locked position in which the axle is fully engaged with the axle receptor, and a second locked position in which the axle is partially engaged with the axle receptor. If a quick release lock is inadvertently released by, for example, pressing a release button, the protrusion retracts and disengages from a first annular groove within the wall of the axle receptor, the axle may start to move axially relative to the axle receptor to a position in which the wheel will disengage from the wheelchair.

Abstract: The present invention is a support arm mechanism that is simpler, more durable and more reliable in use than support arm mechanisms of the prior art. The invention also relates to an improved hinge that can be used in a trunk support arm mechanism, and in other applications. One embodiment of the present invention is a locking trunk support hinge that is convenient to lock and unlock. For example, the hinge can have a lock with a front hinge portion and a rear hinge portion. A locking member, having a locking head and an angled lever, is rotatably mounted to one of hinge portions, and a locking channel extends in the other one. The hinge has a locked mode in which the locking head is engaged in the locking channel and the hinge cannot be opened, and an unlocked mode in which the locking head is not engaged in the locking channel and the hinge can be swung open.

Abstract: A sideframe for a wheelchair has a top frame and a separate bottom frame. An axle plate extends between and is attached to both the top and bottom frames. A caster plate is attached to the sideframe. The top frame and the bottom frame are removably attached to one another. In particular embodiments of the invention, the top and bottom frames each comprise a plurality of bolt apertures. The axle plate and the axle extension plate may each comprise a plurality of bolt apertures. The sideframe may support a rear-mounted major wheel, with the axle plate being to the rear of the sideframe and the caster plate being in the front of the sideframe. Alternatively, the sideframe may support a front-mounted major wheel, with the axle plate being to the front of the sideframe and the caster plate being to the rear. To mount the top frame to the bottom frame, the top frame may have a downwardly extending portion with a concave end piece extending therefrom.

Abstract: Broadly defined, the present invention is a wheelchair seat in which the back of the seat can recline relative to the bottom of the seat. In one particular embodiment, the angle of the back of the seat relative to the bottom portion of the seat can be adjusted at any angle within a particular range of angles. The wheelchair seat can have a locking mechanism that the user can engage to fix the relative angle between the bottom seat portion and the back seat portion into place once the angle is adjusted as desired.

Abstract: A pelvic support mechanism for a wheelchair seat has a bracket comprising a generally “L”-shaped, pivoting portion and a stationary portion that is hingedly attached to the “L”-shaped portion. The pelvic support mechanism has a padded pelvic support mounted on said “L”-shaped, pivoting portion, the stationary portion being mounted onto the wheelchair seat. A release lever that is pivotally mounted on said “L”-shaped portion of the bracket. A sliding bolt that is mounted within the “L”-shaped portion of the bracket and which is interconnected with the release lever. A compression spring that is mounted in the “L”-shaped portion of the bracket and that is in contact with the sliding bolt. An opening in the stationary portion of the bracket for receiving the sliding bolt.

Abstract: A sideframe for a wheelchair has a top frame and a separate bottom frame. An axle plate extends between and is attached to both said top and bottom frames. A caster plate is attached to the sideframe. The top frame and the bottom frame are removably attached to one another. In particular embodiments of the invention, the top and bottom frames each comprise a plurality of bolt apertures. The axle plate and the axle extension plate may each comprise a plurality of bolt apertures. The sideframe may support a rear-mounted major wheel, with the axle plate being to the rear of the sideframe and the caster plate being in the front of the sideframe. Alternatively, the sideframe may support a front-mounted major wheel, with the axle plate being to the front of the sideframe and the caster plate being to the rear. To mount the top frame to the bottom frame, the top frame may have a downwardly extending portion with a concave end piece extending therefrom.

Abstract: A locking system has a side frame having an open end and a spring-loaded hanger release insert extending therefrom. The system also has a hanger body having an upper portion with a terminal end. A hanger pivot fitting extends generally downwardly from the upper portion of the terminal end. A hanger locking surface extends outwardly from the terminal end. The spring-loaded hanger release insert has an upturned mating surface and the hanger locking surface has a downturned mating surface compatible with the upturned mating surface. A hanger release arm is interconnected with the spring-loaded hanger release insert. The system may further include a hanger brace extending from the hanger body, having an alignment guide at an end of the hanger brace. The hanger locking surface may have an angled, generally outwardly-extending face with a step, and the hanger release insert may have an angled, generally outwardly-extending face with a step, each of the steps defining a mutually-compatible mating surface.