Collet wrench

Details Collet wrench Collet wrench

1974-08-12

1976-06-01

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

32 27, 64 29, B25D 23142

Patent

active

039600394

ABSTRACT:
A collet wrench adapted to place a predetermined force on a collet threadedly secured in a dental handpiece. The wrench comprises a frame and means on the frame for securing the rotor shaft against rotation. A shaft is rotably mounted in the frame, and has a lower end of non-circular cross-section. The lower end is received in the collet and is adapted to rotate the collet relative to the rotor shaft. A disc having ratchet teeth is keyed to the shaft and a second disc having ratchet teeth is placed on the first mentioned disc and held there by a spring force. Rotation of the second disc causes the rotation of the first disc, and the subsequent rotation of the shaft having the end secured to the collet. After a predetermined force has been applied to the second disc, it will slip relative to the first disc, and accordingly apply a predetermined force to the collet. The pressure of the spring controls the predetermined force.

REFERENCES:
patent: 1260698 (1918-03-01), Moore et al.
patent: 2410971 (1946-11-01), Hartley
patent: 2634640 (1953-04-01), Pedersen
patent: 3325899 (1967-06-01), Staunt

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