Patent ID: 8973925
Filing Date: 2015-03-10
Classification: A61G,B60C

Abstract:
1. A collapsible wheelchair convertible between a collapsible beach wheelchair and a collapsible all-terrain wheelchair, comprising: a folding frame carrying a foldable seat, a foldable back, a right side frame structure, and a left side frame structure, the right side frame structure having a right side armrest, a right side back frame member, a right side front frame member, and a right side rear frame member, the left side frame structure having a left side armrest, a left side back frame member, a left side front frame member, and a left side rear frame member; a rear right side all-terrain tire of a first diameter rotatably mounted to the right side rear frame member and having a rear right side all-terrain tire axis of rotation; a rear left side all-terrain tire of the first diameter rotatably mounted to the left side rear frame member, and having a rear left side all-terrain tire axis of rotation that is co-axial with the rear right side all-terrain tire axis of rotation and which together define a rear all-terrain axis of rotation whose height from ground is substantially equal to a radius of the first diameter; a front right side all-terrain tire of a second diameter that is less than the first diameter mounted to the right side front frame member and having a front right side all-terrain tire axis of rotation; a front left side all-terrain tire of the second diameter rotatably mounted to the left side front frame member, and having a front left side all-terrain tire axis of rotation that is co-axial with the front right side all-terrain tire axis of rotation and which together define a front all-terrain axis of rotation whose height from ground is substantially equal to a radius of the second diameter, whereby the foldable seat is substantially parallel to ground when the folding frame in un-folded; and conversion components that, when installed on the folding frame with the front and rear all-terrain tires, convert the all-terrain wheelchair into a beach wheelchair, the conversion components including: