Chucks or sockets – Socket type – Obliquely guided reciprocating jaws
Patent
1993-11-15
1995-07-11
Bishop, Steven C.
Chucks or sockets
Socket type
Obliquely guided reciprocating jaws
279140, 279902, B23B 3112
Patent
active
054314194
ABSTRACT:
A drill chuck has a chuck body centered on an axis, a plurality of jaws radially displaceable on the body and each having a row of teeth, and an adjustment ring rotatable about the axis on the body but axially fixed thereon and formed with a screwthread meshing with the teeth of the jaws so that rotation of the ring on the body in a forward tightening direction displaces the jaws radially toward each other and opposite rotation displaces them radially away from each other. The adjustment ring is formed centered on the axis with an annular row of recesses having flanks and open in a predetermined direction. A holding ring is axially fixed on the body and abutments on the holding ring and body permit the holding ring to rotate on the body about the axis between a pair of angularly offset end positions. A return spring engaged between the holding ring and the body can be loaded to urge the holding ring in the forward direction on the body. A latch element on the holding ring has a head engageable opposite to the predetermined direction in the recesses. A spring and cam urge the head into the recesses with a force effective opposite to the predetermined direction except in one of the end positions of the holding ring. The flanks are angled and the spring forces are such that the angular force of the return spring cannot cam the head out of the recesses when engaged therein.
REFERENCES:
patent: 3970323 (1976-07-01), Schnizler, Jr.
patent: 4272087 (1981-06-01), Rohm
patent: 4302021 (1981-11-01), Rohm
patent: 4621819 (1984-09-01), Rohm
patent: 4669932 (1987-06-01), Hartley
patent: 4836563 (1989-06-01), Rohm
patent: 4955623 (1990-09-01), Rohm
patent: 4958840 (1990-09-01), Palm
patent: 5236206 (1993-08-01), Rohm
Bishop Steven C.
Dubno Herbert
Rohm Gunter Horst
Wilford Andrew
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