초록 ▼

Drive wheel axle assemblies (34, 34A) and caster wheel assemblies (94, 252) are mounted to a wheelchair frame (4, 222). One axle assembly (34) includes an axle adjustment tube (40) secured to the frame and an axle housing (56), defining an axle bore (58), toollessly mounted to the axle adjustment tu

Drive wheel axle assemblies (34, 34A) and caster wheel assemblies (94, 252) are mounted to a wheelchair frame (4, 222). One axle assembly (34) includes an axle adjustment tube (40) secured to the frame and an axle housing (56), defining an axle bore (58), toollessly mounted to the axle adjustment tube at any of several rotary orientations to determine the camber of the drive wheel (36) mounted to the axle assembly. The front to rear position of the axle housing can also be adjusted in a toolless manner using a quick release pin (66). The height of the front end (10) of the frame is changed, to ensure that the caster wheel pivot axis (96) remains vertical, without tools by mounting a caster wheel (98) at various vertical positions within a caster spool housing (100) without exposing the user to oil and grease on the spindle (120) and bearings (121). Another axle assembly (34A) permits the height of the drive wheels (254) to be changed without the used tools. The seat back angle can also be changed without tools by a user while sitting in the wheelchair.

대표청구항 ▼

[ What is claimed is:] [6.] In combination with a wheelchair having a frame including a generally upwardly extending rear frame portion, an adjustable seat back assembly comprising:a seat back support mounted on said frame for pivotal movement about a pivot axis between first and second orientations

[ What is claimed is:] [6.] In combination with a wheelchair having a frame including a generally upwardly extending rear frame portion, an adjustable seat back assembly comprising:a seat back support mounted on said frame for pivotal movement about a pivot axis between first and second orientations, said pivot axis being fixed relative to said frame;a first angle adjustment member mounted to one of said seat back support and said rear frame portion at a location above said pivot axis;a user-operable adjuster assembly mounted to the other of said seat back support and said rear frame portion at a location above said pivot axis, said adjuster assembly comprising:a second angle adjustment member sized for cooperation with said first adjustment member as said seat back support is pivoted between said first and second orientations; anda toolless, user-operated adjustment member lock for releasably securing said first adjustment member to said second adjustment member to hold said seat back in a selected one of a plurality of angular positions; anda slide mount by which one of said first adjustment member and said adjuster assembly is mounted to slide on one of said seat back support or said rear frame portion relative to said pivot axis as said seat back support is pivoted about said pivot axis between different angular positions.