Tool chuck

Chucks or sockets – Socket type – Obliquely guided reciprocating jaws

Patent

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Details

279902, B23B 1312

Patent

active

056696167

ABSTRACT:
An improved key-less tool chuck is disclosed. It includes: (a) a main body having a plurality of oblique guidances spaced intermittently at equal angles centering around a central axis, and a rear stopper; (b) a plurality of jaws slidably and respectively mounted in the guidances, each of the jaws having a gear rack, which is slanted relative to the central axis; (c) an integrated rotational nut having a rotational ring, a back ring and a plurality of balls, the rotational nut is mounted in front of the rear stopper and the rotational ring is rotatable about the central axis via the balls, which serve as a bearing; (d) the rotational ring having a slanted inner ring surface having matching slope and internal thread for engaging with the gear racks of the jaws so as to drive the jaws closer together when it is rotated in one direction, and drive the jaws apart from each other when it is rotated in another direction; (e) a front stopper element fixedly mounted on the main body in front of the rotational nut for forcing the rotational nut against the rear stopper; and (f) a front jacket rotatably mounted on the main body and is in movable engagement with the rotation ring for driving the rotational ring to rotate.

REFERENCES:
patent: 1775994 (1930-09-01), Emrick
patent: 5438318 (1995-08-01), Steadings et al.

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