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US 5,836,271 AGranted
Water pump
AssigneeAisin Seiki Kabushiki Kaisha
InventorsNorio Sasaki, Mitsutoshi Hagiwara, Yasuo Ozawa, Itsuro Hashiguchi
Life of this patent
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Abstract
A water pump is provided with pressure-feed means whereby coolant that has leaked into a space between a bearing and a seal member in a pump housing is recovered by being forcibly fed into an radiator reservoir tank.
Claims6
A water pump comprising:
- a housing defining a working chamber;
- a rotary shaft freely rotatably supported in the housing via a bearing;
- an impeller fixedly secured to one end of said rotary shaft and accommodated in said working chamber;
- a seal member provided between said impeller and said bearing, within said housing and around said rotary shaft, said housing having further defined therein a space between said bearing and said seal member;
- pressure-feed means for forcibly feeding coolant that has leaked into said space into a radiator reservoir tank;
- and
- drive means for rotating said rotary shaft to circulate the coolant.
4 more elements
Dependencies are inferred from the claim text.