Force-transmitting arrangement for hammer drills

Details Force-transmitting arrangement for hammer drills Force-transmitting arrangement for hammer drills

1976-09-21

1978-04-18

Bilinsky, Z. R.

Chucks or sockets

Socket type

Screw threaded

85 46, 173104, 279 7, 285334, 403343, B23B 3104, F16B 700

Patent

active

040848299

ABSTRACT:
A force-transmitting arrangement for use in hammer drills and the like includes an internal thread in a chuck of a power tool and an external thread on a portion of the tool element which is to be mounted in the chuck, both threads being of compatible, basically trapezoidal, configurations. The flat flanks of the trapezoidal internal and external threads are offset in the radially outward direction with respect to the mean effective thread diameter. The external thread is rounded at its root with a radius substantially corresponding to the thread height of the external thread, and the internal thread is similarly rounded at its crest with a radius substantially corresponding to the thread height of the external thread, and/or chamfered.

REFERENCES:
patent: RE27284 (1972-02-01), Hjalsten et al.
patent: 3645570 (1972-02-01), Johansson et al.
patent: 3707107 (1972-12-01), Bieri

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