Patent US3795333A successfully refreshed from Google Patents.
US3765071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a roller bearing of superior runout characteristics
Assignee: Individual
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Filing: 1972-09-07
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Granted: 1973-10-16
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Expires: 1992-09-07
Abstract
Abstract This disclosure relates to a method of forming a roller bearing assembly which, when used to support a shaft for rotation, unexpectedly greatly reduces the run-out of the shaft even as compared to previous super precision roller bearings. It has been discovered that if hollow rollers are substituted in a roller bearing for solid rollers and the hollow rollers are positioned between an outer race and a shaft or inner race in a preloaded condition with the allowable flexure of the rollers being at least slightly greater than the variations in radial spacing between the races, the run-out of a shaft axis so supported is greatly reduced. Further, the life of such a bearing is greatly extended. In addition, less precision rollers may be utilized.
Inventors
- 👤 W Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:54
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/34; F16C19/00; F16C19/22; F16C19/24; F16C19/26; F16C27/00; F16C27/04; F16C2322/00; F16C2322/39; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49682; Y10T29/49693
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
The discovery of a method of forming a roller bearing of superior runout characteristics utilizing bearing components of an inferior dimension control, comprising in conjunction wIth an acceptable standard of grading bearings and bearing components wherein the quality of bearings and bearing components are graded in a predetermined sequence, the steps of selecting companion bearing races of known inferior grade in accordance with said standard, selecting hollow rollers of a known grade in accordance with said standard and of a diameter greater than the maximum spacing between said races, assembling said rollers in a preloaded condition between said races for obtaining a bearing having the runout characteristics of a bearing of a grade in accordance with said standard superior than that expected from a bearing utilizing races of said known inferior grade and rollers of said known grade without clearance between each roller and said races.
Claim 2
Dependent Claim
146 words
The discovery of a method of forming a roller bearing of superior runout characteristics utilizing bearing components of an inferior dimension control, comprising in conjunction wIth an acceptable standard of grading bearings and bearing components wherein the quality of bearings and bearing components are graded in a predetermined sequence, the steps of selecting companion bearing races of known inferior grade in accordance with said standard, selecting hollow rollers of a known grade in accordance with said standard and of a diameter greater than the maximum spacing between said races, assembling said rollers in a preloaded condition between said races for obtaining a bearing having the runout characteristics of a bearing of a grade in accordance with said standard superior than that expected from a bearing utilizing races of said known inferior grade and rollers of said known grade without clearance between each roller and said races.
Claim 3
Dependent Claim
35 words
The discovered method of claim 1 wherein the runout of said bearing is less than the permissible runout for one only of said races according to the standard of the grade of the selected race.
Claim 4
Dependent Claim
34 words
The discovered method of claim 1 wherein the runout of said bearing is less than one half the combined permissible runout of said races according to the standard of the grade of selected races.
Claim 5
Dependent Claim
34 words
The discovered method of claim 1 wherein the runout of said bearing is less than one quarter the combined permissible runout of said races according to the standard of the grade of selected races.
Claim 6
Dependent Claim
16 words
The discovered method of claim 1 wherein said rollers and races are of the same grade.
Claim 7
Dependent Claim
46 words
The discovered method of claim 1 wherein said acceptable standards are the known AFBMA standards and the grades thereof are numerical grades with grade 1 bearings and components having largest tolerance and least accuracy and grade 9 bearings and components having least tolerance and greatest accuracy.
Claim 8
Dependent Claim
42 words
The discovered method of claim 6 wherein the selected races are of grade 5 tolerances, the selected rollers are of at least grade 5 tolerances, and the runout of the resultant bearing is within the allowable tolerances for a grade 9 bearing.
Claim 9
Dependent Claim
14 words
The discovered method of claim 7 wherein said rollers are of grade 5 tolerances.
References Cited (Backward Citations)
US3410618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |