Rotary hammer

Details Rotary hammer Rotary hammer

1989-02-28

1990-01-23

Yost, Frank T.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

173109, 173116, 173123, 192 53C, B25D 1110

Patent

active

048952125

ABSTRACT:
A rotary hammer has a pneumatic hammer mechanism which can be driven by means of a driver-part mounted rotatably on an intermediate shaft, with which driver-part a first coupling element of a coupling is non-rotatably connected, while the second coupling element of the coupling is non-rotatably mounted on the intermediate shaft and through axial displacement can be brought into positive coupling engagement with the first coupling element. A synchronizing arrangement is provided, which on approach of the coupling elements to one another, accelerates the first coupling element at least approximately to the rotational speed of the second coupling element and only then permits the positive engagement of the coupling elements.

REFERENCES:
patent: 2736411 (1956-02-01), Schmid
patent: 2976974 (1961-03-01), Blyth
patent: 3374870 (1968-03-01), Johnston
patent: 3430709 (1968-03-01), Miller
patent: 3633716 (1972-01-01), Gortz
patent: 4280359 (1981-07-01), Schmid et al.
patent: 4719976 (1988-01-01), Bleicher et al.
patent: 4750567 (1988-06-01), Grossman et al.

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