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:
Oct. 12, 2004
Filed:
Jan. 04, 2002
Applicant:
Inventors:
John K. Junkers, Saddle River, NJ (US);
Peter Koppenhoefer, Portland, PA (US);
Assignee:
Unex Corporation, Mahwah, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B 1/346 ;
U.S. Cl.
CPC ...
B25B 1/346 ;
Abstract
A fluid operated torque wrench has a housing having a cylinder portion with a cylinder having an axis and a driving portion; two pistons movable in the cylinder along the axis independently from one another and having piston rods; two ratchet-lever mechanisms located in the driving portion; a drive element to which both the ratchet-lever mechanisms are connected; a fluid supply into the cylinder, the pistons being formed so that when the fluid is supplied at opposite sides of the pistons, either one ratchet-lever mechanism turns and the other ratchets, or vice versa.