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. 22, 2008
Filed:
Dec. 26, 2006
Yu-tang Chen, Taichung City 408, TW;
Yu-Tang Chen, Taichung City 408, TW;
Other;
Abstract
A ratchet box end wrench includes a shank, a ratchet, a ring gear, three wheel members, a belt and a crank. The shank includes a space defined therein, a first pivot hole defined therein and a second pivot hole in communication with the first pivot hole. The ratchet includes a ratchet portion disposed in the space and an axial portion extended from the ratchet portion. The ring gear is connected to the axial portion of the ratchet. The first wheel member includes a pivot disposed in the first pivot hole. The belt is engaged with both of the ratchet and the first wheel member. The second wheel member is connected to the first wheel member so that the first and second wheel members are rotational together. The crank is operatively connected to the second wheel member. The third wheel member is operatively connected to the first wheel member.