Extractor structure

Details Extractor structure Extractor structure

2006-05-23

2006-05-23

Watson, Robert C. (Department: 3723)

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

Reexamination Certificate

active

07047609

ABSTRACT:
An extractor structure including a thread rod, a driving unit and an activating unit. A differential nut is rotatably disposed in the driving unit. The thread rod is screwed through the differential nut. The driving unit has several extension arms. The activating unit is disposed under the driving unit and includes a threaded seat and a connecting seat. The connecting seat is pivotally connected with the extension arms of the driving unit. The thread rod is screwed through the threaded seat. The threaded seat has several outward extending fixing arms interlaced with the extension arms of the driving unit. An outer end of each fixing arm is pivotally connected with a claw. An activating arm is pivotally connected with a middle section of the claw and pivotally connected with each connecting arm of the connecting seat. By means of adjusting the thread rod to push the work piece and further screwing the differential nut, the driving unit is operated up and down to make the activating unit open or close the claws for grasping the work piece.

REFERENCES:
patent: 1043400 (1912-11-01), Collison
patent: 1552616 (1925-09-01), Kister

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