Tilt system for a powered wheelchair seat

Abstract

A tilt system for tilting a power wheelchair seat comprises a seat frame having laterally extending front and rear cross tubes and side tubes. A rear cross plate extends laterally between the wheelchair side frames and is slidably engageable with the side frames. A pivotal connection is provided between the rear seat cross tube and the rear cross plate. A front actuator cross tube is supported at a front end of the wheelchair base. A linear actuator is supported between the rear cross plate and the front actuator cross tube. A tilt linkage is disposed along opposite sides of the seat frame. Each tilt linkage has a front end pivotally connected to the wheelchair base and a rear end pivotally connected one of the side tubes of the seat frame. Another embodiment of the invention includes a glide system is secured to the inner surfaces of the wheelchair side frames. Another embodiment of the invention includes a wheelchair having a base comprises of two side frames. A glide system attached to the inside surface of each side frame. Another embodiment of the invention includes an adjustable pivot boss that is attachable to the side frames of a wheelchair so as to extend substantially perpendicularly from the side frames. A tilt linkage sleeve is pivotally engageable with the pivot boss. Both the pivot boss and the tilt linkage sleeve have co-axial central axes. The pivot boss is rotatably adjustable so as to change the location of axes.