Deco-grand, Inc.

Verle Propst

Joseph Paliwoda

Keith F Hale

A coolant pump system features a pump impeller supported on a pump shaft without bearings, and an axially in-line drive shaft with bearings coupled to the pump drive shaft. The system minimally includes a pump body having a bore therein, a coolant pump impeller, a pump shaft passing through the bore and having the impeller mounted on one end thereof, and a bearingless seal shaft assembly disposed in the bore which prevents coolant from leaking out of the body around the rotating pump shaft. The outer end of the pump shaft and the drive shaft are designed to be quickly disconnected to allow simpler, easier, less expensive interconnection of or replacement of the coolant pump, should that ever be necessary. This interconnection mechanism may take the form of a socket with bayonet slot on one shaft and mating pin on the other shaft that fits in the slot, an in-line threaded stem on one shaft and complementary mating socket on the other shaft, or an in-line unthreaded stem on one shaft and a mating socket on the other shaft with a transverse fastener to secure the shafts from separating. This direct-coupled axial in-line design may be advantageously used with an electric drive motor, a chain-driven, belt-driven or gear-driven drive shaft.

Bearingless automotive coolant pump with in-line drive

A coolant pump system driven initially by an electric motor in-line with the pump shaft to the pump housing incorporates a ram air-assisted cooling system. The ram air-assisted cooling system includes an electric motor whose rotating shaft drives the primary fan member. A second fan member is located about and connected to the periphery of the primary fan member and is rotated by high velocity air streams purposefully directed at the secondary fan blades. The air which drives the secondary fan member is preferably gathered by one or more air inlet funnels. Typically, two air inlet funnels are equiangularly disposed adjacent the periphery of the secondary fan blade members so that a balanced current of air is swept across the secondary fan blades. A shroud extends over the secondary fan blade members to force the inlet air over the fan blade members.

Ram air electric drive water pump

A coolant pump system driven by an electric motor mounted in-line with the pump shaft to the pump housing. The system minimally includes a pump body having a bore therein, a coolant pump impeller, a pump shaft passing through the bore and having the impeller mounted on one end thereof, and a bearingless seal shaft assembly disposed in the bore which prevents coolant from leaking out of the body around the rotating pump shaft. The outer end of the pump shaft and the drive shaft of the electric motor preferably include a quick-disconnect coupler which allows the two shafts to be repeatedly coupled and uncoupled without damage and without tools. This coupling mechanism may take the form of a socket with bayonet slot on one shaft and mating pin on the other shaft that fits in the slot. A face-mounted electric motor is rigidly but removably bolted to the pump housing, and its drive shaft provides complete support for the pump shaft which rotates therewith. A double-ended drive may be used in the electric shaft motor if desired. allows a cooling fan assembly with integral clutch mechanism to be driven off one end of the motor shaft, while the coolant pump shaft is driven off of the other end of the motor shaft.

Electric drive water pump

The rotating parts of a vehicle engine water pump are assembled directly upon the engine block so that the block forms the pump housing. The pump parts include a drive wheel, such as a pulley or sprocket wheel, mounted upon one end of a drive shaft, with a pump impeller mounted upon the opposite end of the shaft. An open cavity is formed in the block to receive the impeller. A cover, having a central opening through which the shaft extends, covers the impeller and cavity and is sealed against the block, around the cavity, so that the cover and block together form a complete, sealed housing. The shaft is rotatably connected to the block, within the cavity, and the drive wheel is located on the outside of the cover, adjacent the block, for connection to a belt or chain from the power supply.

Engine block water pump assembly

An engine water pump assembly is formed of a rotatable shaft divided along its length into a bearing portion terminating in a drive connection and a sealing portion terminating in an impeller end upon which a water impeller is mounted. A tubular, journal-type bearing surrounds the shaft bearing portion. A pump housing surrounds the shaft and bearing and has an integral, enlarged chamber formed on one end within which the impeller is located. The opposite end of the housing has an opening through which the shaft drive connection extends. The bearing has an integral, annular flange which surrounds a part of the shaft sealing portion. A seal mounted upon the shaft sealing portion seals against the flange to prevent the flow of water from the impeller chamber to the bearing part of the housing and its opening. The housing is molded around the bearing to form an integral subassembly. The shaft and seal may be pre-assembled and then inserted, as a subassembly, through the housing chamber towards and into the bearing and its flange.

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Rochester Hills, MI, United States of America

Verle Propst