Patent · US Expired

Protective apparatus for preventing the infiltration of contaminants in a fluid-operated percussion device

US6648079B2 · kind B2 · utility

3Cited by

7References

18Claims

0Family size

Assignee

Atlas Copco Construction Tools AB · SE

Inventors

Thomas Deimel · Bad Hersfeld, DE
Markus Mellwig · Hagen, DE
Heinz-Jurgen Prokop · Ratingen, DE

Key dates

Filing date	Mar 16, 2001
Grant date	Nov 18, 2003
Priority date	—
Expiry date	Jun 25, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/365
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A protective apparatus for preventing the infiltration of contaminants in a fluid-operated percussion device, having a striking tool (3) that is guided to move in a housing (2) and is driven by a percussion piston in the striking direction (arrow 1), and a seal (7) that is supported at least indirectly on the housing (2), on the one hand, and on the striking tool (3), on the other hand, and has a securing segment that is fixedly disposed with respect to either the housing or the striking tool. The seal (7) is disposed between the inner guide portion (5b) of the striking-tool guide and the theoretical striking plane (4) of the percussive piston on the striking tool (3), when seen in the direction opposite the striking direction (arrow 1), such that the countersurface (3e) for the seal, which countersurface moves relative to the securing segment (7a) of the seal (7) and is in contact with the seal, is unaffected by wear.

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