Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1995-06-07
1997-12-30
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
137801, E03C 110
Patent
active
057019266
ABSTRACT:
A back flow prevention device and/or vacuum breaker device for mounting on a plumbing fixture. The device comprises a body having fluid entry means, fluid exit means and backflow prevention means. The backflow prevention means is located between the fluid entry means and the fluid exit means and the backflow prevention means comprises, a chamber having an entry port contiguous with the fluid entry means, an exit port contiguous with the fluid exit means and a back flow prevention port which is open to atmospheric pressure and a valve movably mounted between a first position sealing the entry port and a second position sealing the backflow prevention port. Fluid flowing into the chamber moves the valve out of the first position into the second position thereby allowing fluid to freely flow through the chamber, out the exit port and along the fluid exit means. The valve, in the absence of fluid flow along the fluid entry means, returns to its first position thereby leaving the backflow prevention port open to atmospheric pressure to prevent backflow and to permit vacuum breakage.
REFERENCES:
patent: 3144873 (1964-08-01), Moore et al.
patent: 4553560 (1985-11-01), Tucker et al.
patent: 4589438 (1986-05-01), Breda
patent: 4609006 (1986-09-01), Parkison et al.
patent: 4922943 (1990-05-01), Gill
patent: 4953585 (1990-09-01), Rollini et al.
patent: 4977920 (1990-12-01), Oberdorfer
patent: 5009247 (1991-04-01), Oberdorfer
patent: 5022429 (1991-06-01), Rollini et al.
patent: 5079781 (1992-01-01), Gnauert et al.
patent: 5095554 (1992-03-01), Gloor
patent: 5121509 (1992-06-01), Juple
patent: 5163465 (1992-11-01), King, Sr.
patent: 5213131 (1993-05-01), Gnauert
patent: 5213268 (1993-05-01), Gnauert et al.
patent: 5217040 (1993-06-01), Hochstrasser
patent: 5285808 (1994-02-01), Clanin
patent: 5305778 (1994-04-01), Traylor
patent: 5404898 (1995-04-01), Stowers
Ritland, Robin L., "Backflow Prevention: Theory and Practice" 1990, pp.: 47-71, 79-81, 83, 91-103, 118-119, 126-132, and 206-215.
Michalsky Gerald A.
The Rubinet Faucet Company
LandOfFree
Backflow prevention device and vacuum breaker for kitchen plumbi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Backflow prevention device and vacuum breaker for kitchen plumbi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backflow prevention device and vacuum breaker for kitchen plumbi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-194931