Chucks or sockets – With fluid-pressure actuator – Socket type
Patent
1979-05-18
1981-06-30
Bray, W. Donald
Chucks or sockets
With fluid-pressure actuator
Socket type
279121, B23B 3114
Patent
active
042758920
ABSTRACT:
A lathe chuck has a chuck body rotatable about a chuck axis and carrying a plurality of angularly spaced and radially displaceable jaws each formed with an axially backwardly open jaw recess having at least one side inclined to the axis. Respective jaw actuators are axially displaceable in the chuck body and have inclined end portions engageable in the recesses for inward radial displacement of the jaws on displacement of the actuators axially forward toward axially advanced positions and for outward radial displacement of the jaws on displacement of the actuators axially backward toward partially retracted positions. In addition each actuator is displaceable axially backwardly into a fully retracted position when it is out of engagement with the respective jaw, but the actuators engage the respective jaws when in and between the advanced and partially retracted positions. Respective weights are radially slidable on the chuck between inner and outer positions and through intermediate positions. Force-transmitting pins are engaged axially between these weights and the respective jaws for conversion of radially outwardly effective centrifugal forces of the weights into radially inwardly effective forces on the respective jaws. Each of these pins is displaceable between axially advanced and partially retracted positions engageable with the respective jaw and into a fully retracted position unengageable with the respective jaw. A safety ring engages the weights and the actuators and is displaceable on the chuck between a jaw-removal position in which the actuators and pins can assume the respective fully retracted positions and a use position to prevent these actuators and the pins from moving axially backward beyond the respective fully retracted position.
REFERENCES:
patent: 4078814 (1978-03-01), Rohm
Bray W. Donald
Ross Karl F.
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