Turning – Work driver
Patent
1987-11-23
1989-04-11
Schmidt, Frederick R.
Turning
Work driver
279 1L, 279 1DC, 279 33, 279106, B23B 522
Patent
active
048195278
ABSTRACT:
A rotatable chuck workpiece for a power driven threading machine is disclosed comprising a tubular spindle having front and rear ends and front and rear workpiece engaging jaws respectively at the front and rear ends. Each front jaw is connected to a corresponding rear jaw by a rod to which the jaws are rigidly attached, and the rods are mounted on the exterior of the spindle for rotation therewith and for pivotal movement relative thereto. A drive plate at the front end of the spindle is mounted coaxially thereon for pivotal movement relative to the spindle and is provided with drive pins interengaging with slots in the front jaws, whereby pivotal movement of the drive plate in opposite directions imparts pivotal movement of the front jaws radially inwardly and outwardly of the spindle axis. The front jaws and the rods to which they are attached provide the only driving connection between the drive plate and the rear jaws, whereby pivotal displacement of the front jaws imparts corresponding pivotal displacement to the rear jaws. Centering finger components are mounted on each of the front and rear jaws and operate to center a workpiece in the spindle relative to the spindle axis during pivotal movement of the jaws radially inwardly of the spindle.
REFERENCES:
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patent: 3995869 (1976-12-01), Mazingue
patent: 4247124 (1981-01-01), Wagner
Emerson Electric Co.
Schmidt Frederick R.
Shideler Blynn
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