Patent ID: 6309150
Filing Date: 2001-10-30
Classification: B23B,Y10T

Abstract:
A chuck actuator comprising:a main housing;a tube shaft having an outer end adjacent the main housing and an inner end remote from the main housing, and centered on an axis;a core shaft axially displaceable in the tube shaft between advanced and retracted positions and also having an inner end at the main housing and an outer end;a holding device on the outer ends engageable with a tool or workpiece for holding same in the retracted position of the core shaft;a coupling member fixed on the core-shaft rear end;a housing member limitedly axially displaceable relative to the main housing and juxtaposed with the coupling member;formations including a radially projecting lug on one of the members and a radially open groove on the other of the members receiving the lug and of an axial dimension substantially greater than an axial dimension of the lug, whereby the lug can move limitedly axially in the groove;an actuating body axially displaceable in the main housing, having a surface axially engageable with the core-shaft rear end, and having a pair of inwardly directed surfaces respectively engageable with the housing member and main housing, the surfaces being spaced such that when one of the surfaces bears axially inward on the main housing the other of the surfaces bears axially inward on the housing member to displace it axially inward and generally center the lug in the groove; andmeans for moving the actuating body outward to displace the core shaft into the advanced position and inward to allow the core shaft to move into the retracted position and to displace the housing member to center the lug in the groove.