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:
Dec. 31, 1985
Filed:
Nov. 02, 1984
Chao-Yang Chen, Feng-Yuan City, TW;
Other;
Abstract
A wrench suitable for pipe work which includes a handle having two parallel arms, and a body pivotably mounted on the arms by means of a driving gear which passes through two holes provided on the arms, the holes are formed with internal teeth, a rack bar which includes a movable jaw at the forward end thereof and which has a portion slidably received in the body, wherein the driving gear is meshed with the teeth of the rack bar and which has the axis thereof transverse to the handle, when rotating the driving gear, the rack bar moves toward or away from a fixed jaw attached on the body, there are two sector pinions acting as the detent members mounted on the driving gear and operated cooperatively with internal teeth for permitting the uni-directional rotation of the driving gear with respect to the handle.