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US 4,544,200 AGranted
Wheelchair with rocking seat and reclining back feature
AssigneePhilip Dunn
InventorsPhilip Dunn, David A. King
Life of this patent
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AssigneePhilip Dunn
InventorsPhilip Dunn, David A. King
Estimating the term…
A wheelchair seat and back construction adapted to be removably mounted upon a conventional wheelchair frame. A chair base with seat and back member secured thereto is mounted to a chair support by springs positioned between the base and support with the support secured to the wheelchair frame such that the wheelchair user can rock in the chair by reason of the spring mounting between the chair support and chair base. Front and rear lock levers are provided to selectively secure the chair base with seat and back member attached relative to the wheelchair frame to maintain the seat and back in rigid, unrocking condition. The seat and back members are hingedly connected to each other with the seat member being slidably movable upon tracks mounted to the chair base to permit the back member to move into a reclining position for the user upon movement of the seat member. Movement of the seat member upon said tracks is controlled by a reclining release lever which may selectively be positioned for access from the front or rear of the wheelchair so as to prevent the wheelchair user from moving the back member into reclining position, if desired.
A wheelchair seat comprising, a chair support adapted to be removably positioned on a frame part of a wheelchair, a chair base mounted on said chair support and having a seat platform secured thereto, spring means positioned between said base and support for imparting rocking movement to said chair base relative to said chair support, and locking means between said chair base and chair support operable to selectively render said chair base immovable relative to said chair support.
A wheelchair seat comprising, a chair support, a chair base mounted on said chair support and having a seat platform secured thereto, spring means positioned between said base and support for imparting rocking movement to said chair base relative to said chair support, and locking means between said chair base and chair support operable to selectively render said chair base immovable relative to said chair support, said locking means including a first locking lever accessible to the user of the seat only from one side thereof, and a second locking lever accessible only from a side of the seat opposite to said one side and inaccessible to the user of the seat from said one side, said locking levers being movable between a locking position and unlocking position, said chair base being movable relative to said chair support only upon movement of both locking levers into their respective unlocking positions.
A wheelchair seat comprising, a chair support, a chair base mounted on said chair support and having a seat platform secured thereto, spring means positioned between said base and support for imparting rocking movement to said chair base relative to said chair support, locking means between said chair base and chair support operable to selectively render said chair base immovable relative to said chair support, a back rest member hingedly connected to said platform, said back rest member being pivotal about the hinge connection with the seat platform to move the back rest member adjacent the seat platform, said seat platform being positioned upon respective seat mounting tracks which are movable along corresponding track guides secured to said chair base, said back rest member being supported along its surface removed from the hinge connection with the seat platform by a brace member extending from said chair base, said back rest member being movable between variable angular dispositions with respect to normal upon movement of said seat platform along said track guides, a seat latch member operable between one of said mounting tracks and its corresponding track guide to selectively prevent movement of said seat platform, said seat latch member including a release lever to unlatch the seat platform for movement thereof, said release lever being movable in said seat latch member from a first position in which the lever is accessible to the user of the seat only from one side thereof, and a second position in which the lever is inaccessible to the user of the seat from said one side.
A wheelchair comprising, a frame, a chair support adapted to be removably positioned on said frame, a chair base mounted on said chair support and having a seat platform secured thereto, spring means positioned between said base and support for imparting rocking movement to said chair base relative to said chair support, and locking means between said chair base and chair support operable to selectively render said chair base immovable relative to said chair support.
A wheelchair comprising, a frame, a chair support adapted to be secured to said frame, a chair base mounted on said chair support and having a seat platform secured thereto, spring means positioned between said base and support for imparting rocking movement to said chair base relative to said chair support, and locking means between said chair base and chair support operable to selectively render said chair base immovable relative to said chair support, said locking means including a first locking lever accessible to the user of the seat only from one side thereof, and a second locking lever accessible only from a side of the seat opposite to said one side and inaccessible to the user of the seat from said one side, said locking levers being movable between a locking position and an unlocking position, said chair base being movable relative to said chair support only upon movement of both locking levers into their respective unlocking positions.
A wheelchair comprising, a frame, a chair support adapted to be secured to said frame, a chair base mounted on said chair support and having a seat platform secured thereto, spring means positioned between said base and support for imparting rocking movement to said chair base relative to said chair support, locking means between said chair base and chair support operable to selectively render said chair base immovable relative to said chair support, a back rest member hingedly connected to said seat platform, said back rest member being pivotal about the hinge connection with the seat platform to move the back rest member adjacent the seat platform, said seat platform being positioned upon respective seat mounting tracks which are movable along corresponding track guides secured to said chair base, said back rest member being supported along its surface removed from the hinge connection with the seat platform by a brace member extending from said chair base, said back rest member being movable between variable angular dispositions with respect to normal upon movement of said seat platform along said track guides, a seat latch member operable between one of said mounting tracks and its corresponding track guide to selectively prevent movement of said seat platform, said seat latch member including a release lever to unlatch the seat platform for movement thereof, said release lever being movable in said seat latch member from a first position in which the lever is accessible to the user of the seat only from one side thereof, and a second position in which the lever is inaccessible to the user of the seat from said one side.
Dependencies are inferred from the claim text.