US3694616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of securing a bearing race by welding using heat
Assignee: Rolls Royce PLC
•
Filing: 1970-11-03
•
Granted: 1972-09-26
•
Expires: 1990-11-03
Abstract
Abstract The invention concerns a method of securing a bearing track which is journalled on a hollow shaft against rotational movement relative to the shaft. The bearing inner track is journalled against a step on the shaft and abutted by a retaining collar mounted on the shaft. An electron beam is applied to the bore of the shaft in a radial direction to penetrate firstly the shaft wall and then the retaining collar to weld them together so that a residual axial compressive load is produced sufficient to hold the bearing track against rotation relative to the shaft.
Inventors
- 👤 Edward Reginald Brealey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:37
CPC Classifications
B; B23; B23K; B23K15/00; B23K15/04; F; F16; F16C; F16C35/00; F16C35/04; F16C35/06; F16C35/063; F16D; F16D1/00; F16D1/06; F16D1/064; F16D1/068; F16C19/00; F16C19/22; F16C19/24; F16C19/26; F16C2226/00; F16C2226/30; F16C2226/36; Y; Y10; Y10T; Y10T403/00; Y10T403/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A method for securing a bearing race on a hollow shaft having a stop formed on the external surface thereof against rotational movement with respect to said shaft, comprising the steps of: mounting said bearing race externally on said shaft abutting said stop; mounting a retaining collar externally on said shaft in abutting engagement with said bearing race; applying an external force to said collar in the direction of said bearing race; directing a concentrated beam of heat energy substantially radially outwardly of the longitudinal axis of said shaft; penetrating first said shaft and then said collar with said concentrated beam to weld said shaft and collar together; and maintaining said applIed external force during said welding step to maintain said bearing race in abutting engagement with said stop; wherein, after completion of said welding step said shaft and collar contract by different amounts to urge said collar and said bearing race towards said stop.
Claim 2
Independent Claim
155 words
A method for securing a bearing race on a hollow shaft having a stop formed on the external surface thereof against rotational movement with respect to said shaft, comprising the steps of: mounting said bearing race externally on said shaft abutting said stop; mounting a retaining collar externally on said shaft in abutting engagement with said bearing race; applying an external force to said collar in the direction of said bearing race; directing a concentrated beam of heat energy substantially radially outwardly of the longitudinal axis of said shaft; penetrating first said shaft and then said collar with said concentrated beam to weld said shaft and collar together; and maintaining said applIed external force during said welding step to maintain said bearing race in abutting engagement with said stop; wherein, after completion of said welding step said shaft and collar contract by different amounts to urge said collar and said bearing race towards said stop.
Claim 3
Dependent Claim
9 words
An article made by the method of claim 1.
Claim 4
Independent Claim
155 words
A method for securing a bearing race on a hollow shaft having a stop formed on the internal surface thereof against rotational movement with respect to said shaft, comprising the steps of: mounting said bearing race internally on said shaft abutting said stop; mounting a retaining collar internally on said shaft in abutting engagement with said bearing race; applying an internal force to said collar in the direction of said bearing race; directing a concentrated beam of heat energy substantially radially inwardly of the longitudinal axis of said shaft; penetrating first said shaft and then said collar with said concentrated beam to weld said shaft and collar together; and maintaining said applied internal force during said welding step to maintain said bearing race in abutting engagement with said stop; wherein, after completion of said welding step said shaft and collar contract by different amounts to urge said collar and said bearing race towards said stop.
Claim 5
Independent Claim
155 words
A method for securing a bearing race on a hollow shaft having a stop formed on the internal surface thereof against rotational movement with respect to said shaft, comprising the steps of: mounting said bearing race internally on said shaft abutting said stop; mounting a retaining collar internally on said shaft in abutting engagement with said bearing race; applying an internal force to said collar in the direction of said bearing race; directing a concentrated beam of heat energy substantially radially inwardly of the longitudinal axis of said shaft; penetrating first said shaft and then said collar with said concentrated beam to weld said shaft and collar together; and maintaining said applied internal force during said welding step to maintain said bearing race in abutting engagement with said stop; wherein, after completion of said welding step said shaft and collar contract by different amounts to urge said collar and said bearing race towards said stop.
Claim 6
Dependent Claim
9 words
An article made by the method of claim 3.
References Cited (Backward Citations)
US1810028A
Cited
US1840926A
Cited
US2308307A
Cited
US2536784A
Cited
US3185815A
Cited
US3203268A
Cited
US3250581A
Cited
US3245273A
Cited
US3458683A
Cited
US3460237A
Cited
US3512612A
Cited
US3562888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |