Collapsible three-stage golf cart

Claim 1

A collapsible three-stage golf cart comprising: an upper frame having a grip handle formed on an upper end thereof, said upper frame being coupled to an intermediate frame at a lower end of said upper frame through a joint member coupling, said intermediate frame being displaceably coupled to said upper frame at an upper end of said intermediate frame with said intermediate frame being displaceably coupled to a lower frame through a joint member coupling, said lower frame formed of a hollow rod of substantially rectangular cross-section defining a longitudinally directed rectangular cavity passing therethrough to receive a slide block for slidable engagement therein and further including an elongate opening formed within one side of said lower frame for a connecting plate to be displaceably positioned therein; at least one collapsible wheel mechanism including an operating rod having a lower end pivotally connected to a positioning plate which is fixedly secured to a wheel rod base and an upper portion of said lower frame, an upper portion of said operating rod being connected to an actuating member; a pair of wheel rods having a pair of respective inner ends pivotally coupled to said wheel rod base and a pair of respective outer ends coupled to a wheel member for rotational interface with a base surface, one of said wheel rods having a central portion pivotally connected to a first end of a folding rod, said folding rod having a second end pivotally connected to a position member of a slide base slidably mounted on said lower frame; a connecting rod having one end pivotally connected to a central portion of said operating rod and an opposite end pivotally connected to a projecting portion of said slide base, said slide base further defining a rear vertical wall formed with two holes to receive a pair of screws to connect said slide base to said connecting plate and said slide block, said slide block having a rectangular contour and being slidingly engaged in the hollow longitudinal cavity of said lower frame, said slide block having a contoured recess formed in one side thereof and a pair of threaded holes located within the contour of said recess to receive a pair of threaded members to connect the slide block with said connecting plate and said slide base; a wheel rod base consisting of two inverted U-shaped plates bolted on the upper portion of the lower frame having said positioning plate firmly fixed at a central portion thereof and pivotally coupled to said operating rod and, said operating rod being manually displaceable to a position adjacent the intermediate frame resulting in the collapsible wheel mechanism to be extended for positional use of said golf cart and to a position adjacent the lower frame such that said operating rod, said connecting rod, said wheel rods, and said folding rod are displaced to a position contiguous to the the lower frame for minimizing the volume dimension of said golf cart for ease in transportation and storage.