US3838899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axially preloaded bearing assembly
Assignee: Motors Liquidation Co
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Filing: 1973-07-27
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Granted: 1974-10-01
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Expires: 1993-07-27
Abstract
Abstract An automotive waterpump subassembly comprises a sheet metal housing rotatably supporting an impeller drive shaft by a pair of ball bearing complements located in a sealed chamber in the housing. The outer raceway for one of the ball complements is supported on a sheet metal wall plate which is located in the middle of the housing and which is resiliently deflected to axially preload the bearing complements. A sheet metal end plate carries a ceramic face seal element which engages a carbon face seal element carried by the impeller shaft. The wall plate and end plate form a chamber which is divided into three compartments by a S-shaped baffle mounted on the impeller drive shaft. The drive shaft is hollow and closed at the impeller end by a sheet metal impeller. A radial passage in the hollow drive shaft is aligned with the interface of the face seal element and provides a drainage path directly from the outer compartment to atmosphere through the hollow drive shaft for water leaking past the face seal. A drainage hole in the housing communicates directly with the intermediate compartment providing a second drainage path for water before it can reach the inner compartment. The bearings are further sealed from the inner compartment.
Inventors
- 👤 P Sampatacos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:57
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/10; F01P5/12; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/049; F04D29/08; F04D29/10; F04D29/12; F04D29/126; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/602; F05D2260/6022; F16C2360/00; F16C2360/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
238 words
An axially preloaded bearing assembly comprising, a one-piece generally annular sheet metal housing having a smaller diameter end portion, a larger diameter end portion, a necked portion located between said smaller diameter end portion and said larger diameter end portion forming a first angular contact raceway, and a thrust wall portion located between said necked portion and said larger diameter end portion, a one-piece generally annular sheet metal plate having a lateral resilient generally radial wall and an axially disposed continuous inner flange, said plate being disposed in saiD larger diameter end portion of said housing with the outer margin of said generally radial wall abutting said thrust wall portion of said housing, said inner flange having an inwardly curved portion forming a second angular contact raceway facing in the opposite direction of said first angular contact raceway, a shaft coaxially disposed in said housing, said shaft having first and second axially spaced full groove inner raceway means thereon, and first and second complements of circumferentially spaced bearing balls disposed in said first and second inner raceway means respectively, said first and second complements of bearing balls imparting oblique forces to said first and second angular contact raceways respectively which converge in the radially outward direction, said generally radial wall of said sheet metal plate being laterally resiliently deflected and urging said first and second angular contact raceways away from each other to preload said bearing ball complements.
Claim 2
Dependent Claim
238 words
An axially preloaded bearing assembly comprising, a one-piece generally annular sheet metal housing having a smaller diameter end portion, a larger diameter end portion, a necked portion located between said smaller diameter end portion and said larger diameter end portion forming a first angular contact raceway, and a thrust wall portion located between said necked portion and said larger diameter end portion, a one-piece generally annular sheet metal plate having a lateral resilient generally radial wall and an axially disposed continuous inner flange, said plate being disposed in saiD larger diameter end portion of said housing with the outer margin of said generally radial wall abutting said thrust wall portion of said housing, said inner flange having an inwardly curved portion forming a second angular contact raceway facing in the opposite direction of said first angular contact raceway, a shaft coaxially disposed in said housing, said shaft having first and second axially spaced full groove inner raceway means thereon, and first and second complements of circumferentially spaced bearing balls disposed in said first and second inner raceway means respectively, said first and second complements of bearing balls imparting oblique forces to said first and second angular contact raceways respectively which converge in the radially outward direction, said generally radial wall of said sheet metal plate being laterally resiliently deflected and urging said first and second angular contact raceways away from each other to preload said bearing ball complements.
Claim 3
Dependent Claim
275 words
An axially preloaded bearing assembly comprising, a one-piece generally annular sheet metal housing having a smaller diameter end portion, a larger diameter end portion, a necked portion located between said smaller diameter end portion and said larger diameter end portion forming a first angular contact raceway in said housing, and a generally radial wall portion located between said necked portion and said larger diameter end portion and contiguous with said larger diameter end portion, a one-piece generally annular sheet metal plate having a lateral resilient generally radial wall, an axially disposed continuous inner flange and an axially disposed outer flange extending in opposite directions from said generally radial wall, said plate being disposed in said larger diameter end portion of said housing with the outer margin of said generally radial wall abutting said generally radial wall portion of said housing and said outer flange engaging the inner surface of said larger diameter end portion, said inner flange having an inwardly curved portion forming a second angular contact raceway facing toward said larger diameter end portion, a shaft coaxially disposed in said housing, said shaft having first and second axially spaced full groove inner raceway means thereon, and first and second complements of circumferentially spaced bearing balls disposed in said first and second inner raceway means respectively, said first and second complements of bearing balls imparting oblique forces to said first and second angular contact raceways respectively which converge in the radially outward direction, said generally radial wall of said sheet metal plate being laterally resiliently deflected and urging said first and second angular contact raceways away from each other to preload said bearing ball complements.
Claim 4
Dependent Claim
275 words
An axially preloaded bearing assembly comprising, a one-piece generally annular sheet metal housing having a smaller diameter end portion, a larger diameter end portion, a necked portion located between said smaller diameter end portion and said larger diameter end portion forming a first angular contact raceway in said housing, and a generally radial wall portion located between said necked portion and said larger diameter end portion and contiguous with said larger diameter end portion, a one-piece generally annular sheet metal plate having a lateral resilient generally radial wall, an axially disposed continuous inner flange and an axially disposed outer flange extending in opposite directions from said generally radial wall, said plate being disposed in said larger diameter end portion of said housing with the outer margin of said generally radial wall abutting said generally radial wall portion of said housing and said outer flange engaging the inner surface of said larger diameter end portion, said inner flange having an inwardly curved portion forming a second angular contact raceway facing toward said larger diameter end portion, a shaft coaxially disposed in said housing, said shaft having first and second axially spaced full groove inner raceway means thereon, and first and second complements of circumferentially spaced bearing balls disposed in said first and second inner raceway means respectively, said first and second complements of bearing balls imparting oblique forces to said first and second angular contact raceways respectively which converge in the radially outward direction, said generally radial wall of said sheet metal plate being laterally resiliently deflected and urging said first and second angular contact raceways away from each other to preload said bearing ball complements.
Claim 5
Dependent Claim
338 words
An axially preloaded bearing assembly comprising, a one-piece generally annular sheet metal housing having a smaller diameter cylindrical end portion, a larger diameter cylindrical end portion, a necked portion located between said smaller diameter cylindrical portion and said larger diameter cylindrical end portion forming a first angular contact raceway in said housing contiguous with the internal surface of said smaller diameter cylindrical end portion at its maximum diameter, and a generally radial wall portion located between said necked portion and said larger diameter cylindrical end portion and contiguous with said larger diameter cylindrical end portion, a one-piece generally annular sheet metal plate having a lateral resilient generally radial wall, an axially disposed continuous inner flange and an axially disposed outer flange extending in opposite directions from said generally radial wall, said generally radial wall having a plurality of radial slots extending to its outer periphery, said outer flange having axially disposed slots extending from end to end of said outer flange and aligned with said radial slots in said Radial wall, said plate being disposed in said larger diameter cylindrical end portion of said housing with the outer marginal portion of said generally radial wall abutting said generally radial wall portion of said housing and said outer flange engaging the inner surface of said larger diameter cylindrical end portion with a slight radial bias, said inner flange having an inwardly curved portion forming a second angular contact raceway facing toward said larger diameter cylindrical end portion, a shaft coaxially disposed in said housing, said shaft having first and second axially spaced full groove inner raceways on its outer periphery, and first and second complements of circumferentially spaced bearing balls disposed in said first and second inner raceways respectively, said first and second complements of bearing balls engaging said first and second angular contact raceways respectively, said generally radial wall of said sheet metal plate being laterally resiliently deflected and urging said second angular contact raceway away from said first angular contact raceway to preload said bearing ball complements.
Claim 6
Dependent Claim
338 words
An axially preloaded bearing assembly comprising, a one-piece generally annular sheet metal housing having a smaller diameter cylindrical end portion, a larger diameter cylindrical end portion, a necked portion located between said smaller diameter cylindrical portion and said larger diameter cylindrical end portion forming a first angular contact raceway in said housing contiguous with the internal surface of said smaller diameter cylindrical end portion at its maximum diameter, and a generally radial wall portion located between said necked portion and said larger diameter cylindrical end portion and contiguous with said larger diameter cylindrical end portion, a one-piece generally annular sheet metal plate having a lateral resilient generally radial wall, an axially disposed continuous inner flange and an axially disposed outer flange extending in opposite directions from said generally radial wall, said generally radial wall having a plurality of radial slots extending to its outer periphery, said outer flange having axially disposed slots extending from end to end of said outer flange and aligned with said radial slots in said Radial wall, said plate being disposed in said larger diameter cylindrical end portion of said housing with the outer marginal portion of said generally radial wall abutting said generally radial wall portion of said housing and said outer flange engaging the inner surface of said larger diameter cylindrical end portion with a slight radial bias, said inner flange having an inwardly curved portion forming a second angular contact raceway facing toward said larger diameter cylindrical end portion, a shaft coaxially disposed in said housing, said shaft having first and second axially spaced full groove inner raceways on its outer periphery, and first and second complements of circumferentially spaced bearing balls disposed in said first and second inner raceways respectively, said first and second complements of bearing balls engaging said first and second angular contact raceways respectively, said generally radial wall of said sheet metal plate being laterally resiliently deflected and urging said second angular contact raceway away from said first angular contact raceway to preload said bearing ball complements.
Claim 7
Dependent Claim
117 words
The axially preloaded bearing assembly defined in claim 3 further comprising a tube disposed in said housing, said tube having a necked end engaging an internal surface of said necked portion of said housing with a press fit and another end engaging an outer circumferential surface on said inner flange of said plate with a slip fit, first seal means for closing an annular space between said shaft and said smaller diameter portion outboard of said first bearing ball complement, and second seals means for closing an annular space between said shaft and said inner flange on said plate outboard of said second bearing ball complement whereby said bearing ball complements are in a sealed bearing chamber.
References Cited (Backward Citations)
US2521638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |