Anti-siphon and backflow prevention valve

Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

137217, F16K 2400

Patent

active

RE0308498

ABSTRACT:
An anti-siphon and back-flow prevention valve having a main valve chamber including air ports, an inlet at its lower end and an outlet at its upper end. Contained within the main valve chamber is a check valve including a check valve seat, through which the flow of liquid in the valve must pass. The check valve seat has a flexible diaphragm which mates with the check valve seat and functions to block any back flow of liquid from the main valve chamber into the inlet. A flexible ring is also contained in the main valve chamber and mates with the air ports to function as an air valve, allowing air to enter the main valve chamber during low pressure conditions down stream from the valve. The check valve and air valve operate independently of each other, responding to the various air and liquid pressures in and around the main valve chamber. Both valves are normally held closed by the force of gravity and static water pressure within the main valve chamber during no-flow conditions.

REFERENCES:
patent: Re26235 (1967-07-01), Woodford
patent: 833559 (1906-10-01), Stebbins
patent: 833560 (1906-10-01), Stebbins
patent: 1160707 (1915-11-01), Garber
patent: 2174742 (1939-10-01), Groeniger
patent: 2259984 (1941-10-01), Anderson
patent: 2449573 (1948-09-01), White
patent: 2472933 (1949-06-01), Anderson
patent: 2655171 (1953-10-01), Cantor
patent: 2814304 (1957-11-01), Sloan
patent: 2877789 (1959-03-01), Campbell
patent: 2988103 (1961-06-01), Canvasser
patent: 2990843 (1961-07-01), Smith
patent: 3025870 (1962-03-01), Mackey
patent: 3145724 (1964-08-01), Pelzer
patent: 3171424 (1965-03-01), Shames et al.
patent: 3172128 (1965-03-01), Ducey
patent: 3180355 (1965-04-01), Long
patent: 3183924 (1965-05-01), Duchin
patent: 3414003 (1968-12-01), Wyckoff
patent: 3454032 (1969-07-01), Hinz et al.
patent: 3491788 (1970-01-01), Kilayko
patent: 3543786 (1970-12-01), Woodford
patent: 3550616 (1970-12-01), Graham et al.
patent: 3559673 (1971-02-01), Perlman
patent: 3565097 (1971-02-01), Costa
patent: 3572377 (1971-03-01), Graham et al.
patent: 3633613 (1972-01-01), Julow
patent: 3670760 (1972-06-01), Butcher et al.
patent: 3818929 (1974-06-01), Braukmann
patent: 3850190 (1974-11-01), Carlson
patent: 3918477 (1975-11-01), Grams
patent: 3952766 (1976-04-01), Johnson

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Anti-siphon and backflow prevention 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 Anti-siphon and backflow prevention valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-siphon and backflow prevention valve will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1909368

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.