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:
Feb. 12, 1980
Filed:
Apr. 11, 1977
Applicant:
Inventor:
Louis A Champoux, Seattle, WA (US);
Assignee:
Industrial Wire & Metal Forming, Inc., Tukwila, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 30 ; 2924352 ; 7245316 ; 91 47 ; 173169 ;
Abstract
A hand-tool housing a pneumatic and a hydraulic piston joined together with a common piston rod, and separated into an air chamber and a hydraulic chamber by a stationary divider through which the piston rod is sealed for free movement is used as a pulling device. Compressed air moves the puller to a starting position, and an air powered hydraulic unit supplies hydraulic pressure to effect the pulling cycle. Sequencing of the complete pulling cycle is controlled by a trigger actuated air valve mounted in the hand tool.