Fluid handling – With indicator – register – recorder – alarm or inspection means – Inspection means
Patent
1976-04-08
1977-05-10
Nilson, Robert G.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Inspection means
1375157, 137855, F16K 3700, F16K 1514
Patent
active
040222454
ABSTRACT:
A swing type check valve is connected by a double compression coupling to an irrigation pipe. The compression sleeve over the valve is transparent so that the valve may be sight checked or visually inspected.
REFERENCES:
patent: 2388432 (1945-11-01), Nelson
patent: 2867213 (1959-01-01), Thomas
patent: 3131716 (1964-05-01), Griswold
patent: 3279487 (1966-10-01), Elam
Coffee Wendell
Davis Devin S.
Nilson Robert G.
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