US3907386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing assembly systems
Assignee: Avco Corp
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Filing: 1974-01-11
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Granted: 1975-09-23
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Expires: 1994-01-11
Abstract
Abstract A mid-span bearing support for the power take-off shaft of a fan type gas turbine engine is described. The power take-off shaft extends radially through frame struts in the core engine inlet and fan ducts of the engine. These struts are separated by a gap in which a bearing assembly is mounted to journal the power takeoff shaft. This assembly includes a spring bellows which permits the height of the assembly to be reduced by a rotatable sleeve to permit retraction of interdigitating locating means in the installation and removal of the assembly. The spring bellows also provides sealing pressure of the assembly against opposed surfaces of the gap so that oil may flow through the struts and assembly for return to the engine''s oil pump.
Inventors
- 👤 Joseph R Kasmarik
- 👤 Ambros S Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/32; F01; F01D; F01D25/00; F01D25/16; F01D25/162; F02C7/06; F02K; F02K3/00; F02K3/02; F02K3/04; F02K3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A housing comprising two opposed portions separated by a gap, said portions having shaft receiving openings, said opposed portions respectively having opposed parallel surfaces surrounding said openings and defining opposite sides of said gap, a shaft extending through the opening of said opposed portions and spanning said gap, and a bearing assembly disposed in said gap and comprising a pair of flanges surrounding said shaft and respectively juxtaposed relative to said opposed surfaces for sealing relation therewith, a compressed spring bellows extending between said flanges and urging them in opposite directions, a bearing mounted on one of said flanges and journaling said shaft, means interdigitating axially between one of said flanges and said housing for accurately locating said bearing relative to said housing and said shaft, and means connected between said flanges for reducing the overall height of said bearing assembly to permit lateral removal of the bearing assembly from said gap when said shaft is withdrawn.
Claim 2
Dependent Claim
157 words
A housing comprising two opposed portions separated by a gap, said portions having shaft receiving openings, said opposed portions respectively having opposed parallel surfaces surrounding said openings and defining opposite sides of said gap, a shaft extending through the opening of said opposed portions and spanning said gap, and a bearing assembly disposed in said gap and comprising a pair of flanges surrounding said shaft and respectively juxtaposed relative to said opposed surfaces for sealing relation therewith, a compressed spring bellows extending between said flanges and urging them in opposite directions, a bearing mounted on one of said flanges and journaling said shaft, means interdigitating axially between one of said flanges and said housing for accurately locating said bearing relative to said housing and said shaft, and means connected between said flanges for reducing the overall height of said bearing assembly to permit lateral removal of the bearing assembly from said gap when said shaft is withdrawn.
Claim 3
Dependent Claim
32 words
A housing as in claim 1 wherein the flanges are in the form or rings and the interdigitating means extend between the housing and the ring on which the bearing is mounted.
Claim 4
Dependent Claim
96 words
A housing as in claim 2 wherein the interdigitating means comprise a pilot formed concentrically of said bearing and extending into a locating hole formed in the adjacent housing portion and the height reducing means comprise a sleeve surrounding said rings, said sleeve being threaded onto one of said rings and having an inturned flange underlying a circumferential rim formed on the outer ring and further comprising means for preventing relative rotation between said assembly and said houSing to facilitate rotation of said sleeve in varying the height of said assembly during its installation and removal.
References Cited (Backward Citations)
US3473853A
Cited
US3504952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |