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:
Sep. 17, 2019
Filed:
Oct. 24, 2014
Construction Tools Pc Ab, Kalmar, SE;
Thomas Lilja, Kalmar, SE;
Olof Ă–stensson, Kalmar, SE;
ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP, Wilrijk, BE;
Abstract
A pneumatic hammer including a connector for connection to an external compressed air source and a striking mechanism. The striking mechanism includes a housing and a piston arranged for reciprocating motion in the housing. The striking piston has front and rear piston portions. The piston and the housing form front and rear spaces. A compressed air conduit is arranged in airflow communication with the front space via a second passage in the housing, at which second passage a first valve is arranged. There is an intermediate space between the front and rear piston portions and the housing. The control unit is alternately subjected to air pressure of the rear space with respect to the intermediate space during reciprocating motion of the piston. The control unit controls the first valve based on air pressure to alternately supply compressed air to the front space and achieving a return movement of the piston.