Chucks or sockets – Socket type – Obliquely guided reciprocating jaws
Patent
1995-03-07
1996-03-19
Bishop, Steven C.
Chucks or sockets
Socket type
Obliquely guided reciprocating jaws
74577SF, 279140, 279902, B23B 3112
Patent
active
054998298
ABSTRACT:
A lockable drill chuck has a chuck body and an adjustment body rotatable on the chuck body relative to an axis and fixed axially thereon. Respective jaws in guides of one of the bodies have toothed edges meshing with a screwthread of the other body so that rotation of the adjustment body on the chuck body in a forward closing direction about the axis moves the jaws radially toward one another and opposite rotation in an opening direction moves the jaws radially apart. Radially inwardly directed sawteeth is provided on the adjustment body. An elastically deformable locking arm fixed on the chuck body has a free outer end and sawteeth offset from the free end and engageable with the adjustment-body teeth. The arm is radially deflectable between an outer meshed position with the locking-arm sawteeth meshing with the adjustment-body sawteeth and an inner out-of-mesh position. A positioning ring is rotatable on the chuck body between angularly offset locked and unlocked positions and has an actuation part engageable in the locked position with the free end of the locking arm to urge same radially outward into its outer position. The sawteeth are angled such that in the meshed position they positively inhibit rotation of the positioning ring relative to the locking ring in the opening direction while rotation of the positioning ring relative to the locking ring in the closing direction cams the sawteeth radially apart.
REFERENCES:
patent: 573189 (1896-12-01), Vogel
patent: 5431419 (1995-07-01), Mack
patent: 5435578 (1995-07-01), Rohm
Bishop Steven C.
Dubno Herbert
Wilford Andrew
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