Rotary hammer driving mechanism

Details Rotary hammer driving mechanism Rotary hammer driving mechanism

1985-08-05

1987-04-14

Olszewski, Robert P.

Tool driving or impacting

Drive controlled by relative axial movement of tool

173 48, 173109, 173116, 173123, B25D 900

Patent

active

046570888

ABSTRACT:
A rotary hammer with a pneumatic impact mechanism carries on a drive shaft, non-rotatably and non-displaceable axially relative thereto, a coupling element as well as, rotatably and displaceable axially relative thereto, a drive element. The drive element has a peripheral drive fin constituting a cam/control curve which engages between two rollers. The rollers are mounted on the rear end of a piston of the pneumatic impact mechanism with their axes of rotation perpendicular to the longitudinal axis of the piston. The drive element can at choice be brought into engagement with the coupling element. A manually operable control member may be operated to maintain the drive element out of such engagement.

REFERENCES:
patent: 1841351 (1932-01-01), Trotter
patent: 3650336 (1972-03-01), Koehler
patent: 4236588 (1980-12-01), Moldan et al.
patent: 4325436 (1982-04-01), Richter et al.
patent: 4442906 (1984-04-01), Simpson
patent: 4446931 (1984-05-01), Bleicher et al.
patent: 4456076 (1984-06-01), Schmid et al.
British Search Report 8-28-85.
French Search Report 7-22-86.

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