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:
Mar. 03, 1992
Filed:
Mar. 29, 1990
Applicant:
Inventors:
William K Wallace, Barneveld, NY (US);
Knut C Schoeps, Tyreso, SE;
Assignee:
Chicago Pneumatic Tool Company, Utica, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173 935 ; 81463 ; 464 25 ;
Abstract
A hydraulic torque impulse generator uses a dual piston arrangement to provide impacts to a rotative anvil and automatic shut-off and control apparatus for limiting the pressure without reversing the direction of the driving clutch cage, a pressure venting arrangement permitting one impact per revolution.