Variable speed inlet control valve

Details Variable speed inlet control valve Variable speed inlet control valve

1982-04-28

1984-10-16

Kazenske, E. R.

Tool driving or impacting

Passage in manipulating handle for drive motor motive fluid

Motive fluid control valve in handle passage

173168, 173170, 251 84, 251DIG1, B23B 4504

Patent

active

044769423

ABSTRACT:
An inlet control valve particularly useful in connection with pneumatic tools or the like. The valve includes a longitudinally depressible member passing loosely through a frusto-conical plug in a matching frusto-conical valve seat. In the closed position, the plug is seated and the stem is sealed by an O-ring. As the trigger is depressed, the O-ring first releases a path for fluid flow about the shaft within the plug providing an idle speed. Further depressing of the trigger causes a shoulder to contact the plug and, thereafter, move the plug rearward which provides an increasing amount of fluid flow around the plug proportional to the amount of depression thus providing a variable speed.

REFERENCES:
patent: 2823646 (1958-02-01), Brown
patent: 3510099 (1970-05-01), Crump
patent: 3635605 (1972-01-01), Hall et al.
patent: 3811514 (1974-05-01), Blomberg et al.
patent: 3983947 (1976-10-01), Wills et al.
patent: 4024892 (1977-05-01), Prisco et al.
patent: 4109735 (1978-08-01), Bent
patent: 4321722 (1982-03-01), Klocke

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