Shut-off valve having variable input

Details Shut-off valve having variable input Shut-off valve having variable input

1988-12-19

1991-02-12

Hepperle, Stephen M.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

13750518, B25B 2314

Patent

active

049916637

ABSTRACT:
A shut-off valve 50 is disclosed including annular grooves 54 and a valve sleeve 26 including openings 36 which are configured and located relative to each other to define an orifice of variable flow area for supplying fluid from supply passage 16s to motor 16m, the variable orifice having less than maximum flow area when valve 50 is in a normally open position and the variable orifice expanding to maximum flow area during a portion of the travel of valve 50 from the normally open position to a shut-off position.

REFERENCES:
patent: 2721572 (1955-10-01), MacDonnell
patent: 2793075 (1957-05-01), Gulick
patent: 3385378 (1968-05-01), Weber et al.
patent: 3904305 (1975-09-01), Boyd
patent: 4434858 (1984-03-01), Whitehouse
patent: 4635671 (1987-01-01), Viegas
patent: 4844176 (1989-07-01), Podsobinski

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