Lathe chuck

Details Lathe chuck Lathe chuck

1991-01-14

1992-12-01

Schwartz, Larry I.

Turning

Lathe

Headstock

279110, B23B 3126

Patent

active

051671751

ABSTRACT:
A power chuck has a stationary housing, a chuck spindle rotatable in the housing about a chuck axis, a plurality of jaws carried on the chuck body movable radially toward and away from one another, an actuator shaft movable axially relative to the body, and a jaw actuator connected between the actuator shaft and the jaws for displacing same radially outward on displacement of the element in one axial direction and for displacing the jaws radially inward on opposite axial displacement of the shaft. The jaws, shaft, and jaw actuator are rotatable about the axis relative to the spindle. A motion-converter carried on the spindle includes an input element centered on and rotatable about the axis on the spindle, an output element axially displaceable on the spindle, and gearing interconnecting the input and output elements for axial displacement of the output element in one direction on rotation of the input element in one sense and axial displacement of the output element in the opposite axial direction on rotation of the input element in the opposite sense. A bearing interconnects the output element and the shaft for joint axial movement but relative radial rotation and a brake rotationally relatively fixes the jaws, shaft, and jaw actuator relative to the spindle so as to fix the input element against rotation about the axis relative to the housing.

REFERENCES:
patent: 237731 (1881-02-01), Doyle
patent: 1548949 (1925-08-01), Horton
patent: 1565733 (1925-12-01), Godfriaus
patent: 1786147 (1930-12-01), Bullard
patent: 2993701 (1961-07-01), Arnold
patent: 4567794 (1986-02-01), Bald
patent: 4758006 (1988-07-01), Hiestand
patent: 4951535 (1990-08-01), Hiestand
patent: 5005453 (1991-04-01), Rohm

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