Title:
【発明の名称】ハンマ装置
Document Type and Number:
Japanese Patent JP3382667
Kind Code:
B2
Abstract:
Hammer device comprising a machine housing (1) with a hammer piston (2) movable to-and-fro. The movement to-and-fro of the hammer piston is controlled by a valve body (6) movable to-and-fro in the machine housing. In order to speed up the turning of the hammer piston at its rear end position the machine housing is provided with a room (10) which by the hammer piston is separated from connection with the valve body (6) at the same time as the rear end surface (5) is supplied with pressure fluid via a connection (11) opened by the hammer piston to the pressure source (8) when the hammer piston approaches its rear end position.
Inventors:
Kurt Anderson
Application Number:
JP14174093A
Publication Date:
March 04, 2003
Filing Date:
June 14, 1993
Export Citation:
Assignee:
Atlas, Copco, Lockteck, Activolag
International Classes:
B25D9/14; E21B1/00; E21B1/26; (IPC1-7): E21B1/26
Other References:
【文献】西独国特許出願公開477067(DE,A1)
【文献】欧州特許出願公開484672(EP,A1)
【文献】欧州特許出願公開484672(EP,A1)
Attorney, Agent or Firm:
Shigeru Yagita (4 outside)