Device for blocking a piece on a support plane like a table for

Details Device for blocking a piece on a support plane like a table for Device for blocking a piece on a support plane like a table for

1995-01-26

1996-11-12

Watson, Robert C.

Work holders

Relatively movable jaws

Means to actuate jaw

269305, B25B 108

Patent

active

055732305

ABSTRACT:
The device comprises: a central pin (18) provided with means (23, 34) for its blocking to the support plane (10) axis A of the pin (18) perpendicular to the plane itself; an anular hub (20), freely rotating around the pin (18), provided with driving means (60) for its rotation and having a peripherical male screw cutting eccentric in relation to the axis of the pin (18); and a ring nut (22) having an internal screw cutting (52) coupled to the external screw cutting of the hub (20) and presenting on into periphery at least a face (54, 56) for laterally engaging the piece (W), like a thightening jaw, the coupled screw cuttings of the hub (20) and of the ring nut (22) having an irreversible pitch (FIG. 2 ).

REFERENCES:
patent: 449039 (1891-03-01), Fietsch
patent: 4477064 (1984-10-01), DiGiulio
patent: 4805888 (1989-02-01), Bishop
patent: 4915367 (1990-04-01), Carossino

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