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. 29, 1991
Filed:
Apr. 09, 1990
Shyh Y Chern, Ta Li Hsiang, Taichung Hsien, TW;
Other;
Abstract
A power wrench includes a socket which is rotatably retained in a head portion of the wrench by a retainer. A yoke is actuated to swing by a driving axle. A number of grooves are formed in the yoke and in the retainer, each groove gradually changes from narrow to wide and receives a roller and a spring. The rollers slidably contact the socket. When the yoke rotates in one direction, the socket is actuated to rotate. When the yoke rotates in a reverse direction, the rollers in the retainer are caused to hold the socket and prevent the socket from backlash.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile