Pumps – Expansible chamber type – Electrically or magnetically actuated distributor
Patent
1997-01-06
1998-09-22
Freay, Charles G.
Pumps
Expansible chamber type
Electrically or magnetically actuated distributor
417901, 277205, F04B 3908
Patent
active
058105700
ABSTRACT:
A novel reciprocating pump for cryogenic fluids having a super-low NPSH requirement. The pump has a spring-loaded intake valve made of magnetic material and a reciprocating piston having a permanent magnet at its head end. The intake valve is positioned such that when the piston is at or near the top of its stroke, the magnet will tend to pull said intake valve into an open position. The pump also preferably includes a mechanical spring energized (MSE) seal on the upper end of the piston.
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Chemical Seal & Packing, Inc.
Freay Charles G.
Montgomery John W.
Shiells Theodore F.
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