Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent
1981-08-04
1985-02-12
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Fluid pressure responsive indicator, recorder or alarm
137554, 137559, 116267, 210 90, F16K 3700
Patent
active
044984952
ABSTRACT:
A magnetic differential pressure valve is provided, having an indicator showing when the valve has moved into one of the open and closed positions, comprising a housing including a valve seat; valve means reciprocably mounted in the housing for movement towards and away from the valve seat between open and closed positions; first magnetic means movable with the valve means toward and away from the valve seat; first bias means urging the valve means and first magnetic means in one direction and normally retaining the valve means and first magnetic means in one of the closed and open positions; second magnetic means movable toward and away from the first magnetic means and normally retained in a first nonindicating position, reacting with the first magnetic means whenever the two means are within their mutually reactive magnetic fields of force, and the valve means is in one of the closed and open positions; and second bias means urging the second magnetic means into one of the nonindicating and indicating positions when the first magnetic means has moved to a predetermined distance from the second magnetic means, the second magnetic means in its indicating position indicating that the valve means has either opened or closed fluid flow communication between the first and second fluid duct means.
REFERENCES:
patent: 2942572 (1960-06-01), Pall
patent: 3029836 (1962-04-01), Gruner
patent: 3077854 (1963-02-01), Pall
patent: 3140690 (1964-07-01), Siebel
patent: 3420266 (1969-01-01), Downey
patent: 3633612 (1972-01-01), Gross
Stallard Paul
Worwood Bryan H.
Chambers A. Michael
Pall Corporation
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