Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1986-12-19
1988-08-02
Watson, Robert C.
Work holders
Relatively movable jaws
Means to actuate jaw
B23Q 302
Patent
active
047609990
ABSTRACT:
A clamping device which includes a fixed member, a movable member and a threaded shaft passing through the members for pressing an object therebetween. A pressing head having external threads which are finer than the threads of the shaft is placed on the threaded shaft. A pressing cap having internal threads complementary to the threads of the pressing head surrounds the head. This cap provides stronger pressing power upon the object being clamped after the threaded shaft has been moved. A relatively small bolt head formation is formed on the threaded shaft and a relatively large fitting is formed on the pressing head. A handle is provided having a relatively small socket formed therein for being removably received on the relatively small bolt formation providing torque therefore, and a relatively large socket formed therein for being removably received on the relatively large fitting providing torque therefore.
REFERENCES:
patent: 584872 (1897-06-01), Harrison
patent: 4221369 (1980-09-01), Takusugi
Bloom Leonard
Watson Robert C.
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