Rotary expansible chamber devices – With plural working fluid inlet or outlet passages
Patent
1996-01-05
1997-08-26
Vrablik, John J.
Rotary expansible chamber devices
With plural working fluid inlet or outlet passages
418133, 418149, 418152, 418154, F04C 500, F04C 1300, F04C 1500
Patent
active
056605366
ABSTRACT:
A sea water pump (130) for a marine propulsion system includes a housing (130) having a generally cylindrical pumping chamber (134) defined by a generally cylindrical sidewall (136) extending axially between opposite end walls (138 and 140). A multi-vaned rotary impeller (44) in the chamber is driven by an impeller shaft (28) extending axially into the chamber through one of the endwalls (40). An intake port (146) at the other endwall (140) has a first branch (148) providing radial flow (170, 172) into the chamber, and a second branch (154) providing axial flow (178) into the chamber. A discharge port (158) has a first branch (160) receiving radial flow (174, 176) out of the chamber, and a second branch (166) receiving axial flow (180) out of the chamber. The housing (132) is an integrally molded one-piece cup-shaped unit including the cylindrical sidewall (136) integral with an end cap (144) providing a flat inner wall wear surface (140) providing the noted endwall engaging an axial end (50) of the impeller in sealing sliding relation.
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Hydraulics & Pneumatics, "Square Rings", May 1978.
Mercury Marine Sea Water Pump Serial No. C849992 thru D725646 and D725647 thru F213244, 465 Engine, pp. 40-43, Jan. 1995.
Brown George E.
Doty Darrin L.
Jaeger Matthew W.
Karls Michael A.
Schroeder Bruce A.
Brunswick Corporation
Vrablik John J.
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