Three-stage valve switch structure

Details Three-stage valve switch structure Three-stage valve switch structure

2009-03-18

2011-12-13

Rada, Rinaldi (Department: 3721)

Tool driving or impacting

Passage in manipulating handle for drive motor motive fluid

Motive fluid control valve in handle passage

C173S168000

Reexamination Certificate

active

08074733

ABSTRACT:
Disclosed is a three-stage valve switch structure, having a specifically designed main switch and an auxiliary switch, and is operated in cooperation with a forward rotation air passageway, and a reverse rotation air passageway, so that air of an air pump enters into a pneumatic device from said air passageway in driving an oil piston into forward rotation, pulling action, and reverse rotation; and said auxiliary switch is utilized in a condition that, in case that retrieving from a rivet nut done by a pneumatic machine tool is not complete, then said auxiliary switch can be pressed down for driving said pneumatic device into rotating its blades in a reverse manner, hereby reversely rotating said oil piston to make said retrieval from rivet nut more complete. The application of the present invention is not restricted to rivet-nut-riveter, it can also be utilized in pneumatic machine tools requiring forward rotation, pulling action, and reverse rotation functions.

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