Lever bar keyless chuck

Details Lever bar keyless chuck Lever bar keyless chuck

1994-03-04

1996-03-19

Bishop, Steven C.

Chucks or sockets

Socket type

Obliquely guided reciprocating jaws

279902, B23B 3112

Patent

active

054998280

ABSTRACT:
A chuck for use with a manual or powered driver having a rotatable drive shaft including a primary tightening mechanism utilizing a three-jaw assembly actuated by a nut or tightening ring and a supplemental tightening mechanism. The supplemental tightening mechanism includes a camming portion defining a tightening cam profile and a release cam profile. The supplemental tightening mechanism further includes a plurality of lever bars, one end of each of the lever bars forming a cam follower and the other end of each of the lever bars operatively associated with the nut so that when the supplemental tightening mechanism is actuated in a tightening direction, the lever bars will force the nut forward to produce an enhanced tightening force on the tool through the jaws, and when the rear sleeve is rotated in a release direction, the force applied to the nut by the lever bars will be released.

REFERENCES:
patent: 1970056 (1934-08-01), O'Flaherty
patent: 2458626 (1949-01-01), Norige
patent: 3000642 (1961-09-01), Kawasaki
patent: 3311384 (1967-03-01), Kawasaki
patent: 3589486 (1971-06-01), Kelch
patent: 3807745 (1974-04-01), Bent
patent: 5009439 (1991-04-01), Sakamaki
patent: 5215317 (1993-06-01), Jordan et al.
Translated summary of Japanese Patent No. 63-189509 (1988) Inventor: Ando Date of Publication: Dec. 6, 1988.

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