Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1983-02-07
1985-02-19
Scott, Samuel
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
137242, 251 30, 251 45, F16K 31126
Patent
active
045000670
ABSTRACT:
Upon energization a solenoid (58) activates a pilot valve means (44,46) for opening a pilot flow passage (34) causing flow from a pilot portion (52) of the valving chamber. Flow from the main valving chamber (18) and through a bleeder passage (50) is insufficient to prevent a loss of pressure in the chamber (52) and the pressure in valving chamber (18) urges diaphragm pad (29) upward away from contact with valve seat (26) to permit flow from chamber (16) to outlet (20). A diaphragm insert (30) has a portion (32) with a lip (68) extending into a narrow section (66) of outlet (32) for providing a downstream restriction to maintain sufficient pilot circuit differential to provide valve movement until rim (68) moves out of passage (66) thus providing any desired stroke by adjusting the level of (66) to prevent trapping fine particles of foreign matter at the valve seat.
REFERENCES:
patent: 1013213 (1912-01-01), Noyes
patent: 1118440 (1914-11-01), Perkins
patent: 1157870 (1915-10-01), Houser
patent: 1233937 (1917-07-01), Twigg et al.
patent: 1248777 (1917-12-01), Ahlheim
patent: 1911748 (1933-05-01), Carlstedt
patent: 1985257 (1934-12-01), Kocour
patent: 3114532 (1963-12-01), Gray
patent: 3593957 (1971-07-01), Dolter
patent: 3784154 (1974-01-01), Ostrowski
patent: 3791578 (1974-02-01), Brand
patent: 3872878 (1975-03-01), Kozel
patent: 3989222 (1976-11-01), Yoshiyasu
patent: 4078574 (1978-03-01), Kosarzecki
patent: 4174824 (1979-11-01), Kolze
patent: 4222410 (1980-09-01), Geimer
patent: 4283040 (1981-08-01), Kolze
patent: 4387878 (1983-06-01), Zukausky
Eaton Corporation
Flanigan Allen J.
Grace C. H.
Johnston R. A.
Scott Samuel
LandOfFree
Pilot operated low flow valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pilot operated low flow valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pilot operated low flow valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-609024