Patent US4133585A successfully refreshed from Google Patents.
US4133585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient foil journal bearing
Assignee: RTX Corp
•
Filing: 1977-08-04
•
Granted: 1979-01-09
•
Expires: 1997-08-04
Abstract
Abstract A fluid-film journal bearing wherein a resilient foil-insert assembly is disposed between a rotatable journal and a stationary retainer member. The resilient foil-insert may comprise a continuous length of foil coiled into a plurality of layers with the innermost layer providing a bearing surface and another layer preformed into a quasipolygonal configuration.
Inventors
- 👤 Lazar Licht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:58
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/02; F16C17/024; F16C27/00; F16C27/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
In a journal bearing comprising a stationary retaining member having a bore, a rotating journal having a bearing surface and, within said bore, a resilient foil-insert having a bearing surface wherein a fluid film is induced between said bearing surfaces, the improvement in said foil-insert which comprises a continuous length of foil having a portion thereof initially preformed to the shape of an open polygon and coiled within said bore, said initial polygon having a plurality of rounded vertices of prescribed curvatures and a plurality of sides joining and tangent to said rounded vertices, said sides being of prescribed lengths and being inclined to one another at prescribed angles.
Claim 2
Dependent Claim
109 words
In a journal bearing comprising a stationary retaining member having a bore, a rotating journal having a bearing surface and, within said bore, a resilient foil-insert having a bearing surface wherein a fluid film is induced between said bearing surfaces, the improvement in said foil-insert which comprises a continuous length of foil having a portion thereof initially preformed to the shape of an open polygon and coiled within said bore, said initial polygon having a plurality of rounded vertices of prescribed curvatures and a plurality of sides joining and tangent to said rounded vertices, said sides being of prescribed lengths and being inclined to one another at prescribed angles.
Claim 3
Dependent Claim
17 words
The invention of claim 1 wherein said vertices are contiguous to the bore of said retaining member.
Claim 4
Dependent Claim
13 words
The invention of claim 1 wherein said sides are contiguous to said journal.
Claim 5
Dependent Claim
16 words
The invention of claim 1 wherein said polygon portion is preceded by a plane foil section.
Claim 6
Dependent Claim
16 words
The invention of claim 1 wherein said polygon portion is succeeded by a plane foil section.
Claim 7
Dependent Claim
18 words
The invention of claim 1 wherein said polygon portion is both preceded and succeeded by plane foil sections.
Claim 8
Dependent Claim
14 words
The invention of claim 1 wherein said length of foil is of variable thickness.
Claim 9
Dependent Claim
15 words
The invention of claim 1 wherein said length of foil is of variable surface quality.
Claim 10
Dependent Claim
11 words
The invention of claim 1 wherein said vertices have unequal curvature.
Claim 11
Dependent Claim
12 words
The invention of claim 1 wherein said sides are of unequal length.
Claim 12
Dependent Claim
10 words
The invention of claim 1 wherein said angles are unequal.
Claim 13
Dependent Claim
17 words
The invention of claim 1 wherein one of said bearing surfaces is provided with a herringbone-groove pattern.
Claim 14
Dependent Claim
18 words
The invention of claim 1 wherein one of said bearing surfaces is provided with a pocketed Rayleigh-shoe pattern.
Claim 15
Dependent Claim
19 words
The invention of claim 1 wherein said foil is provided with a matrix pattern of protuberances on its surface.
References Cited (Backward Citations)
US3635534A
Cited
US3795427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |