Engine water pump assembly and method of making same

Patent · Tue May 24 04:00:00 EDT 1988

OSTI ID:7128707

Hale, K F; Paliwoda, J; Propst, V

In an automotive engine water pump assembly having a rotatable shaft with a drive end provided with connection means for rotating the shaft and an opposite impeller end upon which a water impeller is mounted, and with the shaft being divided along its length into a bearing portion adjacent the drive end and a sealing portion adjacent the impeller end; and having a bearing surrounding the shaft bearing portion; with a housing having a body surrounding the shaft and bearing along their lengths and having an enlarged chamber around the impeller end of the shaft, within which the impeller is positioned; and a seal surrounding the shaft seal portion for sealing against the flow of water from the housing impeller chamber to the housing bearing surrounding part, the improvement is described comprising: the bearing being formed for a unitary, tubular bushing whose interior surface is adjacent the overlapped bearing portion of the shaft; and the bearing having an integral, annular flange formed on one end for surrounding the part of the shaft sealing portion which is adjacent the shaft bearing portion. The housing is formed of an integral plastic molding, with the bearing being bonded to the surrounding surface of the interior of the wall of the housing body; and the seal extending within and sealing the shaft against the bearing flange. The housing and bearing may be formed in a single subassembly, and the shaft and seal may be formed as a separate subassembly, and the shaft and seal subassemblies may be inserted in an axial direction into the housing through the impeller chamber to position the shaft bearing portion within the bearing for assembly of the pump.

• Assignee: Deco-Grand, Inc., Troy, MI
• Patent Number(s): US 4746270
• OSTI ID: 7128707
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
BEARINGS
COOLING SYSTEMS
DESIGN
ENERGY SYSTEMS
ENGINES
FABRICATION
FLANGES
HEAT ENGINES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
MATERIALS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PUMPING
PUMPS
SEALS
SYNTHETIC MATERIALS
WATER
WATER PUMPS