Hammer drill and/or chipping hammer

Details Hammer drill and/or chipping hammer Hammer drill and/or chipping hammer

2005-10-18

2005-10-18

Huynh, Louis K. (Department: 3721)

Tool driving or impacting

Impacting devices

Hammer head driven by pulsating fluid pressure

C173S114000, C173S122000

Reexamination Certificate

active

06955230

ABSTRACT:
The invention is based on a hand power tool, in particular a drill- and/or chipping hammer, comprising a striking mechanism (10) that has a drivable pot-type piston (12) with at least one idle opening (14).It is proposed that the idle opening (14) is capable of being closed via a controllable, separate closing element (16).

REFERENCES:
patent: 3847229 (1974-11-01), Wanner et al.
patent: 4750567 (1988-06-01), Grossmann et al.
patent: 5111890 (1992-05-01), Ranger
patent: 5435397 (1995-07-01), Demuth
patent: 5816341 (1998-10-01), Bone et al.
patent: 5975217 (1999-11-01), Frenzel et al.
patent: 6523622 (2003-02-01), Berger et al.
patent: 0 775 556 (1997-05-01), None

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