Patent · US Expired

Fluid operated percussion device

US6334495B2 · kind B2 · utility

8Cited by

8References

8Claims

0Family size

Assignee

Krupp Berco Bautechnik GmbH · DE

Inventors

Thomas Deimel · Bad Hersfeld, DE
Marcus Geimer · Essen, DE
Marcus Mellwig · Hagen, DE
Heinz-Jurgen Prokop · Ratingen, DE

Key dates

Filing date	Mar 16, 2001
Grant date	Jan 1, 2002
Priority date	—
Expiry date	Mar 16, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D9/265
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A fluid-operated percussion device (1) having a percussive piston (3), 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 (1), the percussive piston (3) 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 3e) and reached a no-load-strike position. For this purpose, the interior (2d) of the work cylinder (2) that receives the percussive piston (3) additionally has a no load-strike opening (20a), which is connected to the pressure line (8) of the percussion device (1) with an interposed safety element (21) that can be switched between an inoperative position and an operative position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.