Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1992-12-15
1994-07-19
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
137217, 13762517, E03C 110, F16K 2402
Patent
active
053299574
ABSTRACT:
A fluid flow system (20) includes fluid inlet conduits for supplying fluid through a fluid flow path (86) as formed by a manifold (74) and a module (76). The fluid is directed through fluid flow path (86) to a flexible conduit (54) and to a fluid dispensing wand (36) whereat the fluid can be selectively dispensed in a stream or a spray. A linking passageway (102) is formed by manifold (74) and module (76) to couple selectively the pressure of a pressurized environment, such as atmospheric pressure, to fluid flow path (86). An umbrella valve (104) is located in linking passageway (102) and is responsive to the development of a negative pressure at the fluid supply and thereafter couples the pressure of the pressurized environment to fluid flow path (86). This action neutralizes the effects of the negative pressure and precludes the reverse flow of fluid within fluid flow system (20).
REFERENCES:
patent: Re32981 (1989-07-01), Marty
patent: 2394911 (1946-02-01), Griswold
patent: 2587960 (1952-03-01), Bletcher et al.
patent: 3056418 (1962-10-01), Adams et al.
patent: 3917172 (1975-11-01), O'Hare
patent: 4221337 (1980-09-01), Shames et al.
patent: 4609006 (1986-09-01), Parkison et al.
patent: 4696322 (1987-09-01), Knapp et al.
patent: 4805661 (1989-02-01), Knapp et al.
patent: 4827538 (1989-05-01), Heimann et al.
patent: 4969483 (1990-11-01), Knapp
patent: 4977920 (1990-12-01), Oberdorfer
patent: 5009247 (1991-04-01), Oberdorfer
patent: 5038814 (1991-08-01), Gayton et al.
patent: 5060687 (1991-10-01), Gayton
patent: 5079781 (1992-01-01), Gnauert et al.
patent: 5095554 (1992-03-01), Gloor
patent: 5103856 (1992-04-01), Fleischmann
Baker Reid H.
Semchuck Mario E.
Emhart Inc.
Hoofnagle J. Bruce
Michalsky Gerald A.
LandOfFree
Fluid flow system vacuum breaker does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid flow system vacuum breaker, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid flow system vacuum breaker will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-513740