Stone working – Work supports
Patent
1977-01-10
1978-03-14
Whitehead, Harold D.
Stone working
Work supports
51216R, 125 13R, 269156, 279106, B28P 704
Patent
active
040785394
ABSTRACT:
A chuck assembly for gripping and holding objects including a base, a face plate rotatably mounted on the base, and a plurality of arms pivotally connected to and extending outwardly from the face plate for swinging toward and away from each other. A threaded tube is secured to the face plate and a nut on the tube is operable to urge the face plate into frictional engagement with the base to secure it in a selected position. A threaded rod extends through the tube and has a semi-spherical washer pivotally mounted thereon. Connecting members extending inwardly from the arms engage portions of the washer. A nut on the threaded rod is operable to draw the washer toward the face plate to swing the arms toward each other. During swinging of the arms toward each other the washer may pivot on the rod to permit the arms to swing toward each other at different rates to grip and hold an asymmetrical object therebetween.
REFERENCES:
patent: 297981 (1884-05-01), Francis
patent: 1022761 (1912-04-01), Stvanek
patent: 2436004 (1948-02-01), Hall
patent: 3103922 (1963-09-01), Nelson
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