Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent
1980-10-03
1982-07-06
Nilson, Robert G.
Fluid handling
Systems
Sequentially closing and opening alternately seating flow...
13759617, F16K 1116
Patent
active
043377980
ABSTRACT:
A converter for electromagnetic operation of a valve is provided with a tubular, hydraulically balanced piston which has an upper end whose outer diameter is only slightly larger than its inner diameter so that it forms a valve seat with the pressure pin of the magnet to produce a slight difference in coupling back pressure in magnetic operation of the valve. Preferably, the electromagnet only operates in on-off states.
REFERENCES:
patent: 2889814 (1959-06-01), Mercier
patent: 3112769 (1963-12-01), Broadwell
patent: 3150856 (1964-09-01), Deibel
patent: 3354894 (1967-11-01), Stoll
patent: 3874406 (1975-04-01), Von Loewis
patent: 4077674 (1978-03-01), Doto
patent: 4117865 (1978-10-01), Beck
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