Abstract: In a water pump, a water reservoir portion into which cooling water leaking from between a bearing portion and a rotating shaft flows via an introduction hole is divided into a first division portion and a second division portion by a gasket. The first division portion and the second division portion communicate with each other through a communication hole formed in the gasket. The second division portion includes a drain hole through which cooling water is discharged to outside.

Abstract: In a water pump, a water reservoir portion into which cooling water leaking from between a bearing portion and a rotating shaft flows via an introduction hole is divided into a first division portion and a second division portion by a gasket. The first division portion and the second division portion communicate with each other through a communication hole formed in the gasket. The second division portion includes a drain hole through which cooling water is discharged to outside.

Abstract: A water pump includes a mechanical seal provided between a housing and a rotary shaft for preventing cooling water from leaking from a whirl chamber. The housing forms a space into which cooling water leaked from between the mechanical seal and the rotary shaft is flown and a water vent for discharging cooling water flown into the space. The housing is joined with a thermostat cover to form a reservoir communicating with the water vent. The reservoir has a drain for releasing evaporated cooling water to the air and a control wall for preventing cooling water remaining as liquid from flowing out through the drain.

Abstract: The object is to obtain reasonably a blade member for a pump having superior fluid transporting performance. A blade member for a fluid pump includes a cylindrical portion formed around a rotational axis, a plurality of base portions protruding radially outwardly of the rotational axis from one end portion of the cylindrical portion along the rotational axis and provided along a circumferential direction, a bent portion bent from each of the respective base portion in one direction along the rotational axis, and a hole portion provided in a border portion between root portions of the adjacent base portions. A rising edge portion extending from the hole portion to a leading end of the bent portion and an overhang edge portion extending from the hole portion to a leading end of the base portion are formed by a common cut portion.

Abstract: A water pump includes a mechanical seal provided between a housing and a rotary shaft for preventing cooling water from leaking from a whirl chamber. The housing forms a space into which cooling water leaked from between the mechanical seal and the rotary shaft is flown and a water vent for discharging cooling water flown into the space. The housing is joined with a thermostat cover to form a reservoir communicating with the water vent. The reservoir has a drain for releasing evaporated cooling water to the air and a control wall for preventing cooling water remaining as liquid from flowing out through the drain.

Abstract: A water pump comprises a pump body, a cylindrical supporting portion, a pulley, a shaft portion, an impeller, a seal member, a pulley cylinder portion, a wall portion, a through-hole formed, a cover covering the wall portion and the pulley cylinder portion of the pulley from one side of the pulley, and the cover formed in a cylindrical shape with a bottom portion and including a reservoir for receiving fluid that has leaked through the seal member.

Abstract: A water pump includes a pump body and a block which are respectively provided with attachment surfaces that surround an opening defined by a vortex chamber. A first one of the attachment surfaces is provided with an annular groove. An annular sealing member is embedded in the annular groove. A sealing mechanism for the water pump includes the annular sealing member having a protruding segment protruding from a periphery of the annular sealing member such that the protruding segment extends outward from an outer periphery of a second one of the attachment surfaces; and the annular groove having a branching groove segment which branches out from the annular groove and is provided in the first one of the attachment surfaces such that the protruding segment is embedded in the branching groove segment.

Abstract: A water pump includes a rotation member, a hollow shaft portion having an opening on one end and connected to the rotation member for unitary rotating with the rotation member, an impeller connected to the shaft portion for unitary rotating with the shaft portion, a body defining a fluid chamber in which the impeller is rotated, a bearing for rotatably supporting the shaft portion on the body, a sealing member provided between the shaft portion and the body for sealing the fluid chamber and a cover portion for substantively closing the opening of the shaft portion.

Abstract: A water pump comprises a pump body, a cylindrical supporting portion, a pulley, a shaft portion, an impeller, a seal member, a pulley cylinder portion, a wall portion, a through-hole formed, a cover covering the wall portion and the pulley cylinder portion of the pulley from one side of the pulley, and the cover formed in a cylindrical shape with a bottom portion and including a reservoir for receiving fluid that has leaked through the seal member.

Abstract: A water pump includes a driven portion, a shaft including a hollow portion for rotating with the driven portion as a unit, an impeller rotating with the shaft as a unit, a body including a cylindrical supporting portion inserted by the shaft, a bearing provided between an external peripheral surface of the supporting portion and an internal peripheral surface of the driven portion for rotatably supporting the driven portion, and a mechanical seal sealing one side of a cylindrical space defined between an external peripheral surface of the shaft and an internal peripheral surface of the supporting portion, wherein a vibration absorption member is provided in the hollow portion of the shaft.

Abstract: A water pump includes a rotation member, a hollow shaft portion having an opening on one end and connected to the rotation member for unitary rotating with the rotation member, an impeller connected to the shaft portion for unitary rotating with the shaft portion, a body defining a fluid chamber in which the impeller is rotated, a bearing for rotatably supporting the shaft portion on the body, a sealing member provided between the shaft portion and the body for sealing the fluid chamber and a cover portion for substantively closing the opening of the shaft portion.

Abstract: A water pump is provided with pressure-feed means whereby coolant that has leaked into the space between a bearing and a seal member in a pump housing is forcibly fed into an radiator reservoir tank in order to be recovered.

Abstract: A liquid pump in which a perfect seal is achieved between a liquid and the atmosphere without the use of magnets includes a driving unit coupled to external power for being rotated thereby, a shaft installed obliquely with respect to the axial direction of the driving unit and having one end thereof rotatably supported on the driving unit, an impeller, rotatably supported on a housing so as to rotate in coaxial relation to the driving unit, for rotatably supporting the other end of the shaft and impelling a liquid by being rotated, and a bellows provided between the shaft and the housing for effecting sealing liquid-tightly between the shaft and the housing on the side of the impeller.

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.

Abstract: A fluid pump includes a housing body mounted to a mounting plate in a liquid-tight manner, a pump shaft having a journal portion rotatably supported on the mounting plate and a cylindrical cam portion integrally formed with one end of the journal portion located in the housing body, an impeller mounted on the other end of the pump shaft immersed in hydraulic fluid at a backside of the mounting plate, a drive shaft rotatably mounted within the housing body to be applied with a drive torque and positioned coaxially with the journal portion of the pump shaft, the drive shaft being formed with an eccentric bore the center axis of which is radially displaced from the center axis of the journal portion, a carrier having a cylindrical cap portion rotatably coupled with the cylindrical cam portion of the pump shaft and a shaft portion integrally formed with the cylindrical cap portion coaxially therewith and rotatably coupled within the eccentric bore of the drive shaft, and a diaphragm of elastic material coupled at

Abstract: A liquid pump in which a perfect seal is achieved between a liquid and the atmosphere without the use of magnets includes a pump shaft rotatably supported inside housings and having an impeller secured thereto for impelling a liquid through the pump, a driven unit provided inside the housing for rotating the pump shaft, a driving unit coupled to external power, and a resilient member provided between the driven unit and the driving unit for effecting sealing liquid-tightly between the driven unit and the driving unit on the side of the impeller and transmitting force from the driving unit to the driven unit.