Patent ID: 8393633

Claim:
A golf bag cart foldable device comprising: a bottom cart stand having a link segment at a top, wherein two sides of the link segment are in pinned connection with two rear wheel frames each linking a rear wheel, with the bottom cart stand having a bag base at a bottom, wherein the bag base is connected to a front wheel frame, to link a front wheel; an upper cart stand in pinned connection with the link segment of said bottom cart stand through a rotator set up at a bottom of the upper cart stand; a linkage set comprising a plurality of linkages joined to said upper cart stand, said bottom cart stand and the rear wheel frames respectively, to form links between said upper cart stand and said bottom cart stand and between said upper cart stand and the rear wheel frames; and a folding joint, set up on the rotator of said upper cart stand, having a buckle enabling release of said folding joint first, followed by turning of said upper cart stand, and by the link between said linkage set and the rear wheel frame, simultaneous unfolding or folding of said upper cart stand, said bottom cart stand and the rear wheels is accomplished, and said folding joint being secured to have said upper cart stand and said bottom cart stand locked to each other, wherein said linkage set comprises: a first linkage in pinned connection with the rotator at a top of the rotator; a second linkage coupling to the first linkage on a first end of the second linkage and coupled to said bottom cart stand on a second end; and a third linkage coupling to the second linkage on one end of the third linkage and coupled to the rear wheel frame on another end of the third linkage.