Patent ID: 8602444
Filing Date: 2013-12-10
Classification: B62B

Abstract:
1. A hand cart, comprising: a frame having a left vertical member and right vertical member, each vertical member having a top end that is coupled to a handle bar, and a bottom end that has a pin extending therefrom; a left wheel assembly and a right wheel assembly, each wheel assembly having a tubular housing that receives a portion of a vertical member, and a wheel secured to the tubular housing, each tubular housing having a spiral slot that receives the pin of the corresponding bottom end for movement within the slot, each tubular housing further includes a lower end; a carrier plate having a left seat that is pivotably connected to the bottom end of the left vertical member, and a right seat pivotably connected to the bottom end of the right vertical member, each seat having two sidewalls that define a space therebetween for receiving the corresponding bottom end, with each sidewall having a first stop surface adjacent to and perpendicular to the plane of the carrier plate, a second stop surface parallel to the plane of the carrier plate, and a curved surface connecting the first and second stop surfaces; a spring seated inside each tubular housing and positioned around a portion of the corresponding bottom end; and wherein the lower end of each tubular housing is adjacent the first stop surface of the corresponding seat when the carrier plate and the wheels are pivoted against the frame, and the lower end of each tubular housing is adjacent the second stop surface of the corresponding seat when the carrier plate and the wheels are pivoted away from the frame.