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:
Jul. 09, 1996
Filed:
Apr. 03, 1995
Applicant:
Inventor:
Jessie Chow, Taichung, TW;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
81 632 ; 81 63 ; 81 60 ; 192 43 ; 192 46 ;
Abstract
A ratchet wrench includes a ratchet wheel and a pawl engaged in a head portion. The ratchet wheel includes a number of curved and concave teeth formed in the outer peripheral surface, and the pawl includes a number of curved and convex teeth for engaging with the curved and concave teeth of the ratchet wheel so as to strengthen the engagement between the teeth. In addition, the teeth of the pawl are all engaged with the teeth of the ratchet wheel such that the engagement between the ratchet wheel and the pawl is further strengthened.