The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2019
Filed:
Jun. 16, 2017
Applicant:
Unique Product & Design Co., Ltd., Tainan, TW;
Inventor:
Chih-Ching Cheng, Tainan, TW;
Assignee:
Unique Product & Design., Ltd., Tainan, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B62B 7/06 (2006.01); B62B 3/02 (2006.01); F16H 19/00 (2006.01); F16B 12/40 (2006.01);
U.S. Cl.
CPC ...
B62B 7/06 (2013.01); B62B 3/02 (2013.01); F16B 12/40 (2013.01); F16H 19/001 (2013.01); B62B 2202/404 (2013.01); B62B 2202/42 (2013.01);
Abstract
A cart, at least a folding joint mechanism disposed among an upper frame, a bottom frame and a rear wheel frame, comprising a bottom frame joint having a first arc-rack, an upper frame joint having a second arc-rack, a rear wheel frame joint, and a linkage gear unit disposed between the upper and bottom frame joints, the linkage gear unit having a first and a second gears rotating coaxially and engaging with the first and second arc-rack respectively, and the first and second gears having the numbers Nand Nof gear teeth respectively, and wherein Nand Nare greater than or equal to 6.