Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Reissue Patent
2007-07-17
2007-07-17
Edgar, Richard A. (Department: 3745)
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
C415S169100, C415S193000
Reissue Patent
active
10884825
ABSTRACT:
delete-start id="DEL-S-00001" date="20070717" ?A cooling water pump for internal combustion engine includes a base and an outer cover forming a water input chamber, an impeller supported on a shaft within said chamber, fed shaft includes a bearing/seal unit mounted within the base and the shaft extended outwardly for connection to the engine. A one-piece, fully enclosed and double shrouded impeller is secured to the shaft. Impeller has a central hub with an outer peripheral concave surface, a bottom convex end wall, vanes are secured to the central portion of the concave wall in the bottom wall and project outwardly therefrom with an outer top shroud. The base has a recess within which the bearing/seal unit is mounted. The recess extends outwardly beyond the outer edge convex wall of the hub from a cooling chamber. The vanes direct a portion of the water flowing through the passageway into the recess for cooling purposes and then back into the radially outer portion of the passageway for discharge with the flowing water into the outlet passageway. The radially inner end of the shroud and outer convex wall overlap each other to form a controlled entrance into the outlet passageway to divert part of the flow into the recess.delete-end id="DEL-S-00001" ?insert-start id="INS-S-00001" date="20070717" ?The invention pertains to a cooling water pump for an internal combustion engine. The pump has a base and a cover that form a water chamber. The chamber includes a one-piece, shrouded impeller secured to a drive shaft driven by the engine. The impeller has a central hub with vanes that project outwardly along with its integral shroud to form a flow passageway to a discharge opening. The base has a recess within which a bearing/seal unit is mounted. The recess extends outwardly beyond the hub to form a cooling passageway to the recess. A portion of the water flowing through the flow passageway is directed into the recess to cool the seal unit, and then back to the flow passageway for discharge. The shroud and hub can overlap to help control the flow to the recess.insert-end id="INS-S-00001" ?
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Boyer John
Morris R. David
Tomlinson George
Ulm Curtis
Cook & Franke S.C.
Edgar Richard A.
Sokol Jeffrey S.
United Components, Inc.
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