Adjustable quick release seatback system particularly for use with wheelchairs
AssigneeCascade Designs, Inc.
InventorsMurray Dennon, John S. Lincoln
Life of this patent
Estimating the term…
Abstract
A wheelchair seatback assembly suitable for detachable mounting to the back-supporting posts of a wheelchair. The back assembly includes a relatively rigid shell member carrying post-engaging pins and a plurality of mounting clips attachable to wheelchair posts. At least selected ones of the mounting clips are further formed to releasably engage the post-engaging pins. The mounting units are also formed for single-handed automatic unlocking and release of the pair of hooks from the mounting units and posts upon rotation of the shell member forwardly over the wheelchair seat by an amount in excess of any displacement occurring during normal use of the wheelchair.
Claims30
A wheelchair seatback system for mounting a seatback to a pair of spaced apart posts or canes of a wheelchair back frame, comprising:
- a seatback comprising a first pair of laterally spaced and opposed mounting locations and a second pair of laterally spaced and opposed mounting locations longitudinally spaced from the first pair of opposed mounting locations;
- a first pair of laterally extending pins attached to the first pair of opposed mounting locations on the seatback;
- a second pair of laterally extending pins attached to the second pair of opposed mounting locations on the seatback;
- a first pair of mounting clips respectively attached to each cane and positioned to receive the first pair of extending pins;
- and
- a second pair of mounting clips respectively attached to each cane and positioned to receive the second pair of extending pins
- wherein one of the first pair or the second pair of mounting clips include a pair of releasable self-locking mechanisms for retaining a pair of extending pins and releasing the same upon user activation of the mechanism.
A removable seatback system, with user determinable anterior and posterior positioning, for mounting to a pair of spaced apart support members comprising:
- a seatback comprising a pair of superior mounting locations and a pair of inferior mounting locations wherein one pair of the superior or inferior mounting locations has attached thereto a first connecting means for linking the seatback system to the support members comprising one of a pair of extending pins capable of anterior and posterior movement or a pair of pin receiving members;
- and
- a second connecting means for linking the seatback system to the support members comprising one of a pair of extending pins capable of anterior and posterior movement or a pair of pin receiving members positioned on the support members to receive the first connecting means
- wherein each said pin receiving member comprises a releasable self-locking mechanism for selectively receiving and retaining an extending pin and releasing the same upon user activation of the mechanism.
A method for removing and inserting a seatback from a pair of support elements, the seatback comprising a pair of superior lateral mounting locations, each having a pin bar comprising a bar portion and an extending pin, and a pair of inferior lateral mounting locations, each having a pin bar comprising a bar portion and an extending pin, wherein each extending pin is receivable by a receiving member mountable to a pair of substantially upright support elements disposed on opposite lateral sides of the seatback when engaged therewith, the method comprising:
- disengaging the seatback from the support elements by manual operation a pair of releasable self-locking mechanism located on the substantially upright support elements so as to permit exposure and removal of the pin bars there from, and condition the mechanism to subsequently and passively receive the pin bars;
- translating the seatback in one of a posterior or anterior direction such that the formerly captive pin bars can be removed from the releasable self-locking mechanisms;
- and
- engaging the seatback with the support elements by positioning the pin bars in the releasable self-locking mechanisms and translating the seatback in one of a posterior or anterior direction to secure the seatback to the upright support elements.
Dependencies are inferred from the claim text.