Pumps – Expansible chamber type – Including valve assembly – disassembly – or inspection...
Patent
1984-07-24
1986-10-21
Freeh, William L.
Pumps
Expansible chamber type
Including valve assembly, disassembly, or inspection...
F04B 2100, F04B 3914
Patent
active
046183167
ABSTRACT:
A liquid end for a reciprocating pump having easily removable valves and valve retainers in which the liquid end has a cylindrical valve chamber communicating with the fluid inlet and fluid outlet and the pump cylinder, the chamber having increased internal diameter portions so that the internal diameter of each portion is slightly larger than the portion just below it, the intake valve being received on an internal ledge, and intake valve retainer engaging and holding the intake valve in position and having a cylindrical ceiling surface engaging a portion of a wall of the valve chamber, an exhaust valve supported on top of the intake valve retainer and exhaust valve retainer engaging the exhaust valve and holding it in place, the exhaust valve retainer having a circumferential cylindrical portion sealably engaging a portion of the valve chamber so that the valves may be removed by removing the chamber and each chamber may be removed by a short upward pull, each retainer, upon upward pull, immediately passing into an area of the valve chamber having an increased internal diameter. Intake and exhaust valves are identical in size. Valve seats and valve discs are fully reversible, providing two useful wear surfaces, instead of one. Fast, convenient removal is provided by the construction.
REFERENCES:
patent: 1640408 (1927-08-01), House
patent: 1687029 (1928-10-01), McClatchie
patent: 1977806 (1934-10-01), Richardson
patent: 3009423 (1961-11-01), Leissner
patent: 3030978 (1962-04-01), Griffith et al.
patent: 3078868 (1963-02-01), Lamb
patent: 3399694 (1968-09-01), Vinson
patent: 3415271 (1968-12-01), Maasberg et al.
patent: 3792939 (1974-02-01), Zallis
patent: 4039003 (1977-08-01), Cheek
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