Chucks or sockets – Radially reciprocating jaws – Spiral cam or scroll actuated
Patent
1984-10-05
1986-07-29
Briggs, William R.
Chucks or sockets
Radially reciprocating jaws
Spiral cam or scroll actuated
279 19, 279 66, B23B 3116
Patent
active
046027998
ABSTRACT:
A chuck has a chuck body centered on a chuck axis and having an axially forwardly opening and axially centered recess and an adjustment ring rotatable but not axially displaceable on the chuck body, having a central hole aligned with the recess, and formed with a plurality of guide passages open radially inwardly into the hole. The body and ring normally are carried on a drill spindle with the shank of a drill bit through the recess and hole and the spindle, shank, and chuck axes all coaxial. Respective jaws radially displaceable in the passages have inner ends engageable with the drill-bit shank in the recess. The chuck body has a face directly axially confronting the jaws and formed with an axially projecting spiral ridge. The jaws have axially projecting teeth complementary to and engaging with the ridge. Thus relative rotation of the body and ring about the axis radially displaces the jaws in the ring.
REFERENCES:
patent: 51384 (1865-12-01), Cushman
patent: 218861 (1879-08-01), Cushman
patent: 435475 (1890-09-01), Abrams
patent: 465826 (1891-12-01), Baston
patent: 507598 (1893-10-01), Sellers
patent: 1713799 (1929-05-01), Whiton
patent: 2598165 (1952-05-01), Harvey
patent: 2693966 (1954-11-01), Chasar
Briggs William R.
Dubno Herbert
Ross Karl F.
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