Hammer drill and /or percussion hammer with no-load...

Details Hammer drill and /or percussion hammer with no-load... Hammer drill and /or percussion hammer with no-load...

2005-07-05

2005-07-05

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

C173S201000

Reexamination Certificate

active

06913088

ABSTRACT:
A percussion hammer drill and/or percussion hammer that can be guided by a handgrip comprises a pneumatic spring striking mechanism with a reciprocating drive piston and with a percussion piston that can be operated by the drive piston. A cavity for accommodating a pneumatic spring is provided between the drive piston and the percussion piston. The cavity can be connected to the surrounding area via a no-load operation channel in order to achieve a no-load operation. This this end, a valve is situated inside the no-load operation channel and can be controlled according to an application force that can be applied to the handgrip by the operator.

REFERENCES:
patent: 4074777 (1978-02-01), Andersson et al.
patent: 4222443 (1980-09-01), Chromy
patent: 4305473 (1981-12-01), Gidlund
patent: 4388972 (1983-06-01), Gidlund
patent: 4483402 (1984-11-01), Vonhoff, Jr.
patent: 5161623 (1992-11-01), Erlach
patent: 5533579 (1996-07-01), Chu
patent: 6076616 (2000-06-01), Kramp et al.
patent: 6209659 (2001-04-01), Blessing
patent: 6237700 (2001-05-01), Berger et al.
patent: 6691798 (2004-02-01), Lindsay
patent: 2002/0003045 (2002-01-01), Bongers-Ambrosius
patent: 323766 (1920-08-01), None
patent: 197 13 154 (1997-10-01), None
patent: 197 14 288 (1998-10-01), None
patent: 197 24 531 (1998-12-01), None
patent: 198 47 687 (2000-04-01), None
patent: 242218 (1926-03-01), None
patent: WO 16948 (2000-03-01), None
patent: WO 2072315 (2002-09-01), None

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