Chucks or sockets – Radially reciprocating jaws – Wedge actuated
Patent
1977-10-06
1979-05-22
Culver, Horace M.
Chucks or sockets
Radially reciprocating jaws
Wedge actuated
B23B 3114, B23B 3116, B23B 3126
Patent
active
041555643
ABSTRACT:
A chuck is disclosed wherein the jaws of the chuck may be locked by tapered lock means so that if actuating force on the chucking and unchucking actuator is lost during rotation of the chuck, the external diameter of the workpiece will still be gripped by the jaws. A first linkage in the chuck body interconnects an axially movable actuator with the radially movable master jaws. This may be a bell crank lever or an interconnecting wedge. First lost motion means is provided in this first linkage. A second linkage is provided from the actuator to the tapered lock means and includes a second lost motion means which is smaller than the first lost motion means. A spring urges the tapered lock means into a locked position when the workpiece is chucked and then if force is lost on the actuator, this tapered lock means acting on the master jaws prevents release of the workpiece. When the actuator is moved toward the unchucking position, it acts first through the second lost motion connection to release the tapered lock means and then acts through the first lost motion connection to move the jaws outwardly to release the workpiece.
REFERENCES:
patent: 1449454 (1923-03-01), Smith
patent: 2828134 (1958-03-01), Buck et al.
patent: 2982558 (1961-05-01), Multer
patent: 3460849 (1969-08-01), Highberg
patent: 3663029 (1972-05-01), Dexter
patent: 3704022 (1972-11-01), Blattry et al.
patent: 4007943 (1977-02-01), Scharfen et al.
patent: 4026566 (1977-05-01), Rohm
patent: 4047723 (1977-09-01), Buck
Benjamin Milton L.
Miles Wilbur N.
Culver Horace M.
Erickson Tool Company
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