Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1988-08-08
1990-03-06
Hartman, Judy J.
Work holders
Relatively movable jaws
Means to actuate jaw
269228, B25B 114
Patent
active
049059750
ABSTRACT:
A clamping device with a mechanical servo mechanism having an axially movable plunger (3) and a clamping sleeve (6) which surrounds the servo mechanism and which engages by an external thread (6a) in an internal thread (2a) of a stationary housing (2). A clamping member (7), one end of which is supported on the plunger (3), is axially slidable in and non-rotatably connected to the clamping sleeve (6). Furthermore, an abutment (9) connected to an operating lever (10) is rotatable to a limited extent in the clamping sleeve (6). Between the clamping member (7) and the abutment (9) are disposed several studs (11). The external thread (6a) is provided directly on the outer circumference of the clamping sleeve (6), concentrically to the region of the clamping member (7) and the studs (11). A compression spring (15) is supported at one end on the housing (2) and at the other end on the plunger (3, 4 ), and acts via the latter on the clamping member (7). An adjusting sleeve (14) is axially slidable relative to the clamping sleeve (6) by means of a fine thread (14a), and between the side of the abutment (9) facing away from the studs (11) and the adjusting sleeve (14) are disposed several cup springs (12). Rotational movement of the clamping sleeve (6) is limited relative to the housing (1) in the direction of opening by stop faces (19a, 20).
REFERENCES:
patent: 3188077 (1965-06-01), Olson
patent: 3306604 (1967-02-01), Christensen
patent: 4384707 (1983-05-01), Poot
Gressel AG
Hartman Judy J.
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