Drill chuck

Details Drill chuck Drill chuck

1999-01-28

2000-06-06

Bishop, Steven C.

Chucks or sockets

Socket type

Obliquely guided reciprocating jaws

279902, B23B 3112

Patent

active

060708840

ABSTRACT:
A drill chuck has a chuck body rotatable about a chuck axis and formed with a plurality of axially forwardly open and angled guide passages and with a radially outwardly open groove, respective jaws slidable in the passages and each having a row of radially directed teeth and an axially backwardly directed face, and a ring received in the groove and rotatable about the axis relative to the chuck. The ring is formed with a screwthread meshing with the jaw teeth so that rotation of the ring in one direction moves the jaws axially forward and radially together and opposite rotation moves the jaws axially backward and radially apart. In accordance with the invention a spring is operatively engaged between the chuck body and the ring and compressible on axial backward movement of the jaws into an extreme rear position for cushioning the backward movement of the jaws into the extreme rear position.

REFERENCES:
patent: 2075031 (1937-03-01), Emrick
patent: 3948534 (1976-04-01), Schnizler, Jr. et al.
patent: 4775159 (1988-10-01), Manschitz
patent: 5913524 (1999-06-01), Barton

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