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. 20, 2009
Filed:
Mar. 07, 2005
Anders Wilhelm Lundgren, Degerhamn, SE;
Anders Wilhelm Lundgren, Degerhamn, SE;
Atlas Copco Construction Tools AB, Nacka, SE;
Abstract
A hydraulic breaker hammer comprises a housing () with a longitudinal bore (), a cylinder sleeve (), and a cylinder sleeve () engaging rear end cover (), a hammer piston () reciprocally powered in the cylinder sleeve () for delivering blows to a working implement inserted in a guide sleeve () at the front end of the bore (), wherein the guide sleeve () is provided with radial openings () for communication of lubricant from a lubricant supply passage () in the housing () to the inside of the guide sleeve (), and the guide sleeve () is provided with external seal rings (-) forming annular compartments located between the lubricant supply passage () and the radial openings () for spreading lubricant on the outside surface of the guide sleeve (), a distribution valve () communicating with the pressure fluid source and the cylinder sleeve () and comprising both a clearance seal means () and a seat seal () for improved tightness, and a pressure accumulator () with an expansion chamber () divided by a flexible membrane (), wherein a movable membrane support member () is limited in its outward displacement by a bulge shaped projection () formed integrally with one of the expansion chamber walls ().