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:
Jan. 17, 1978
Filed:
Mar. 10, 1976
Applicant:
Inventors:
Kurt Holger Andersson, Tyreso, SW;
Carl Gosta Ekwall, Saltsjobaden, SW;
Bo Erik Forsberg, Vallingby, SW;
Assignee:
Atlas Copco Aktiebolag, Nacka, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173-1 ; 173139 ; 92 8 / ;
Abstract
A recoil damping device for a percussive tool comprises a retard piston which is movable in a cushioning chamber. The feeding force and/or the pressure in the supply passage to the cushioning chamber is regulated so that the retard piston is axially free relative to the machine housing.