Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent
1994-04-25
1995-04-11
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Fluid pressure responsive indicator, recorder or alarm
137312, 137613, F16K 3700
Patent
active
054049059
ABSTRACT:
A backflow prevention device with a failure indicator designed to determine the functional state of integral backflow prevention device(s) or check valve(s). Check valve(s) are assembled in combination with pressure gauge(s) or failure indicator(s) and valve(s) or flow regulation device(s) between an inlet area and outlet area, and is designed to allow a working fluid to flow in the desired direction of fluid flow and prevent backflow. A built in test or procedure enables the functional condition of backflow prevention device(s) or check valve(s) to be determined readily, easily, and reliably.
REFERENCES:
patent: 2587960 (1952-05-01), Bletcher et al.
patent: 2587961 (1952-05-01), Bletcher et al.
patent: 3028877 (1962-04-01), Thieme
patent: 3376884 (1968-04-01), Bucknell et al.
patent: 3860033 (1975-01-01), Grove et al.
patent: 3905392 (1975-09-01), Gray
patent: 4043355 (1977-08-01), Cerruti et al.
patent: 4071045 (1978-01-01), Brandt
patent: 4271862 (1981-01-01), Snoek
patent: 4271863 (1981-06-01), Bishop
patent: 4271864 (1981-06-01), Neff
patent: 4290446 (1981-09-01), Seiler
patent: 4395018 (1983-07-01), Moen
patent: 4706705 (1987-11-01), Lee
patent: 4706706 (1987-11-01), Page et al.
patent: 4991655 (1991-02-01), McHugh
patent: 5148828 (1992-09-01), Farnham
patent: 5195552 (1993-03-01), Nehm
patent: 5203872 (1993-04-01), Naffziger
Nupro "50" Series Lift Check Valve (Aug., 1990) N-189-3 1 page Jan. 1993.
Metraflex "Silent Check Valves" (Catalog page from Mechanical Products Catalog) 1 page Jan. 1990.
PTO Disclosure Document 389536 dated Aug. 21, 1991.
Author (Applicant) 6 total pages Title: Backflow Preventer with Visual Failure Indicator.
Watts Regulator Company "Backflow Prevention Products" Catalog Binder and Material. All Sections and catalogs relevant except price lists, Jan. 1993.
LandOfFree
Backflow preventer with failure indicator 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 preventer with failure indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backflow preventer with failure indicator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1532555