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. 09, 1982
Filed:
Jul. 20, 1978
Applicant:
Inventors:
David L Thomas, Columbus, OH (US);
Donald J Hackman, Columbus, OH (US);
Assignee:
Battelle Development Corporation, Columbus, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173119 ; 91291 ;
Abstract
A hydraulically operated impact tool is provided for performing land-based or undersea tasks including hammering, chipping, scraping, punching, and cutting. The tool's features include a spring (preferably hydroelastic) for storing impact-stroke energy, a configuration of valves which eliminates flow in the supply and return lines during the impact stroke, and a control approach which provides operator selection of either single-blow or continuous-cycling operation.