Hammer drill

Details Hammer drill Hammer drill

1978-04-04

1980-02-19

Staab, Lawrence J.

Tool driving or impacting

Drive controlled by relative axial movement of tool

173 48, 173 97, B23Q 5027, E02D 702

Patent

active

041890116

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.

REFERENCES:
patent: 1895540 (1933-01-01), Cohen
patent: 2799035 (1957-07-01), Pfluger
patent: 3225610 (1965-12-01), Binder
patent: 3680642 (1972-08-01), Kirn et al.
patent: 3693728 (1972-09-01), Stroezel
patent: 3789933 (1974-02-01), Jarecki
patent: 4090747 (1978-05-01), Jensen

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