Pumps – Expansible chamber type – Including valve assembly – disassembly – or inspection...
Patent
1979-01-02
1981-04-07
Freeh, William L.
Pumps
Expansible chamber type
Including valve assembly, disassembly, or inspection...
417554, 285377, 285362, F04B 2106, F16L 1706
Patent
active
042603412
ABSTRACT:
A double acting pump includes an elongated thin walled hollow barrel, having an inlet end and a head end, and an elongated hollow plunger slidably received in said barrel and forming with its inner surface an annular space. A two piece detachable fitting includes one part on the head end of the barrel, and a mating part with a seal between one end of the barrel and the outer surface of the plunger. A valve assembly and seal is mounted on the inlet end of the plunger, with that seal engaging the interior of said plunger. A nozzle is mounted on the discharge end of the plunger. A two piece inlet fitting includes one part on the inlet end of the barrel, a mating detachable part having an inlet valve seat, and a check valve captured between the parts of the inlet fitting and cooperating with the seat to allow flow into the barrel. A filter piece is supported in the detachable part of the inlet fitting and also functions to capture the check valve between the seat and the filter piece.
REFERENCES:
patent: 193810 (1877-08-01), Eccloston
patent: 771094 (1904-09-01), Rhoads
patent: 1033187 (1912-07-01), Metzger
patent: 1213492 (1917-04-01), Hughes
patent: 1241962 (1917-10-01), Greve
patent: 1299934 (1919-04-01), Harnett
patent: 3040712 (1962-06-01), Harrah
patent: 3131646 (1964-05-01), Parrott
patent: 3537730 (1970-11-01), Kresin
patent: 3583837 (1971-06-01), Rolsten
patent: 3701548 (1972-10-01), McGuire
Freeh William L.
The Wright Company
LandOfFree
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