US 12,128,940 B2
Cart capable of being horizontally folded without increasing height
Benlong Sun, Jinhua (CN)
Assigned to ZHEJIANG PRIDE LEISURE PRODUCTS CO., LTD., Zhejiang Province (CN)
Filed by Zhejiang Pride Leisure Products Co,. Ltd., Jinhua (CN)
Filed on Nov. 10, 2023, as Appl. No. 18/506,181.
Claims priority of application No. 202223005982.2 (CN), filed on Nov. 11, 2022.
Prior Publication US 2024/0157992 A1, May 16, 2024
Int. Cl. B62B 3/02 (2006.01); B62B 5/06 (2006.01)
CPC B62B 3/025 (2013.01) [B62B 5/067 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A cart capable of being horizontally folded without increasing the height, the cart comprising:
a frame composed of a front wall, a back wall and two symmetric side walls;
a chassis disposed at a bottom of the frame; and
four wheel assemblies disposed on two sides of the front wall and two sides of the back wall respectively;
wherein the front wall comprises a support, a lower horizontal tube and two sliding blocks;
wherein the lower horizontal tube is fixed to two symmetric ends of the support;
wherein the sliding blocks are disposed along two vertical tubes of the support and are able to slide upwards and downwards;
wherein the back wall is identical in structure with the front wall;
each said side wall comprises at least two X-shaped folding members which are hinged together;
each said X-shaped folding member comprises a first long tube and a second long tube which are riveted together;
wherein upper ends of the first long tubes on front and back sides of the side walls are riveted to tops of the vertical tubes of the supports of the front wall and the back wall respectively;
the second long tubes on the front and back sides of the side walls are riveted to the sliding blocks of the front wall and the back wall respectively;
wherein the chassis comprises two bottom frames which are symmetrically hinged together, and a front side and a back side of the chassis are riveted to the horizontal tube of the front wall and the horizontal tube of the back wall respectively.