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. 01, 2002
Filed:
Mar. 16, 2001
Thomas Deimel, Mülheim, DE;
Marcus Geimer, Dettighofen, DE;
Marcus Mellwig, Hagen, DE;
Heinz-Jürgen Prokop, Ratingen, DE;
Krupp Berco Bautechnik GmbH, Essen, DE;
Abstract
A fluid-operated percussion device ( ) having a percussive piston ( ), which alternately executes a work stroke and a return stroke due to the effect of a control. To avoid no-load strikes, in one embodiment of the percussion device ( ), the percussive piston ( ) is shut down if it has overshot the extended position occurring in normal operation (long- and/or short-stroke operation) by a predetermined distance in the work-stroke direction (arrow ) and reached a no-load-strike position. For this purpose, the interior ( ) of the work cylinder ( ) that receives the percussive piston ( ) additionally has a no load-strike opening ( ), which is connected to the pressure line ( ) of the percussion device ( ) with an interposed safety element ( ) that can be switched between an inoperative position and an operative position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile