Title: Hammer drill

Abstract: A hammer drill has a housing and a spindle mounted on the housing for rotating and reciprocating longitudinal movement. The spindle has a leading end provided with an end portion extending outward through a hole in the housing, facing a wall to be drilled. The housing is provided with a motor rotating the spindle and a member which subjects the spindle, when the latter rotates, to reciprocating longitudinal movement.

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Inventors: Eberle, Robert (Nurtingen, DE, US)

Application Number: 893356
Filing Date: 1978-04-04
Publication_date: 1980-02-19
Assignee: Metabowerke GmbH & Co. (Nurtingen, DE)
Primary Class(es): 173/13 173/48, 173/97
Other Classes:
US Patent Ref:

1895540	Jan, 1933	Cohen	308/189.
2799035	Jul, 1957	Pfluger	74/56.
3225610	Dec, 1965	Binder	74/56.
3680642	Aug, 1972	Kirn et al.	173/48.
3693728	Sep, 1972	Stroezel	173/48.
3789933	Feb, 1974	Jarecki	173/48.
4090747	May, 1978	Jensen	308/30.

Other Refs: 1204126253169998337

Oct, 1965	DE
Feb, 1977	DE
Jun, 1961	NL

Primary Examiner: Staab, Lawrence J.
Assistant Examiner:
Attorney: Striker; Michael J.