Work holders – Relatively movable jaws – Clamp couple element with fastening means
Patent
1992-02-03
1993-03-02
Watson, Robert C.
Work holders
Relatively movable jaws
Clamp couple element with fastening means
B23Q 302
Patent
active
051902710
ABSTRACT:
A hold down clamp for a workpiece comprising a plate-like base having planar top and bottom surfaces, and forward, rearward and side edges. An abutment means extends transversely of the upper surface near the rearward edge thereof. A vertical clamping screw support of inverted L-shape is mounted centrally of the base side edges between the abutment means the base rearwad edge. The free end of the support contains a vertical internally threaded bore. A vertical clamping screw is engaged in the bore and supports a clamping head with a clamping surface adaped to cooperate with the base top surface. The clamp may be removably affixed to a work surface or shifted in free floating manner there along. The clamp base bottom surface has an axial slot, extending from the base forward edge through the base rearward edge, for use when the clamp is to be shifted in guided fashion along a power tool table having a guide slot. A T-guide is provided comprising upper and lower bars joined together. The lower bar is slidably receivable in the guide slot of the tool table, and the upper bar is slidably receivable in the clamp base slot, giving the clamp a first path of travel along the tool table determined by the lower bar and its slot, and a second path of travel determined by the upper bar and its slot. The clamp may be provided with a support and balance board to laterally extend the base.
REFERENCES:
patent: 568543 (1896-09-01), Parks
patent: 1026475 (1912-05-01), Tarbuck
patent: 1318688 (1919-10-01), Paschall
patent: 4020742 (1977-05-01), Raymond
patent: 4441394 (1984-04-01), Barsotti
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