Chucking accessory

Details Chucking accessory Chucking accessory

1982-08-02

1985-04-16

Briggs, William R.

Chucks or sockets

Expanding

Collet type

B23B 3140

Patent

active

045111537

ABSTRACT:
A chuck accessory for grasping a tubular workpiece at the interior wall by action originating in the jaws of a conventional three-jaw chuck makes use of an internal split jaw mandrel, the jaw elements of which are forced into outwardly directed engagement with the interior wall of the workpiece. To transfer conventional chuck action to the interior split jaw mandrel use is made of a transfer assembly in which a set of circumferentially disposed tilting fingers in the form of bell crank levers mounted on an accessory body have extensions which project endwardly against one end of an axially movable draw sleeve. There is an expansion plug at the opposite end of the draw sleeve which, when drawn into the expanding portion of the split jaw mandrel, expands the jaw elements into engagement with the workpiece. A spring return disengages the mandrel.

REFERENCES:
patent: 1467821 (1923-09-01), Tuttle
patent: 2383036 (1945-08-01), Benjamin et al.
patent: 2469873 (1949-05-01), Ernest
patent: 2970842 (1961-02-01), Drew
patent: 3115798 (1963-12-01), Donaway
patent: 3131946 (1964-05-01), Newhouser
patent: 3311383 (1967-03-01), Cox
patent: 4208061 (1980-06-01), Morawski

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