초록 ▼

A carriage, chair, or similar structure is described having two cross frames which are interpivotally connected by means of a two axis pivot joint and which are held in their unfolded position at a fixed angle with respect to each other by rigid brace members pivotally connected to the sides of the

A carriage, chair, or similar structure is described having two cross frames which are interpivotally connected by means of a two axis pivot joint and which are held in their unfolded position at a fixed angle with respect to each other by rigid brace members pivotally connected to the sides of the frames and characterized in that the said brace members each comprise three sections, the middle sections provide horizontal rests for arms. The carriage, chair, or similar structure also incorporates a two piece toggle bar, and three piece knuckle strut disposed in front to serve both as a support member for the carriage structure and as a rest or support member for the object, e.g., a passenger, to be placed in the structure.

대표청구항 ▼

A collapsible carriage structure comprising: a collapsible bottom cross-frame formed by a first pair of intersecting interpivoted rigid elements; a collapsible back cross-frame formed by a second pair of intersecting interpivoted rigid elements, said bottom and back cross-frames articulately interco

A collapsible carriage structure comprising: a collapsible bottom cross-frame formed by a first pair of intersecting interpivoted rigid elements; a collapsible back cross-frame formed by a second pair of intersecting interpivoted rigid elements, said bottom and back cross-frames articulately interconnected at a pair of respective ends; two collapsible side brace assemblies each comprising an upper, lower and middle section, said upper sections including handle means, said upper sections articulately interconnected to the respective upper ends of the back cross-frame, and inclined backward and parallel to each other when unfolded, said lower sections articulately interconnected to the respective front ends of the bottom cross-frame, and inclined backward and parallel to each other when unfolded, said middle section forming a generally horizontal arm rest comprising: a horizontally disposed lower extension of said upper section; a horizontally disposed upper extension of said lower section; and a knuckle member joining said extensions together to form a collapsible joint; two rigid rear support legs each connected on one end to a respective one of said lower extensions of said upper sections by means of a triangular knuckle member and each articulately connected to the respective rear end of said bottom cross-frame; means for releasably locking said structure in the open position; and, pairs of double wheel sets disposed on the lower end of said lower sections of said side assemblies and on the lower end of said rear legs; said cross-frames and side brace assemblies capable of being cooperatively collapsed so as to cause the carriage structure to occupy a diminished cross-sectional area.