Patent US3829239A successfully refreshed from Google Patents.
US3829239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple element journal bearing
Assignee: RTX Corp
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Filing: 1973-02-21
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Granted: 1974-08-13
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Expires: 1993-02-21
Abstract
Abstract Journal bearing structure utilizing a plurality of cylindrical journal bearing elements supported by a resilient mounting within a housing, the bearing elements being spaced apart axially a finite amount.
Inventors
- 👤 R Rybicki
- 👤 C Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:45
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/38; F16F1/3863; B; B64; B64C; B64C27/00; B64C27/32; B64C27/35; F16C; F16C27/00; F16C27/06; F16C27/063; F16C2326/00; F16C2326/43
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A bearing mounting for an articulated helicopter rotor in which a rotor blade is connected to a rotor head hub; said hub having an opening therein; a rotor blade member extending within said hub opening; a plurality of elastomeric bearings connecting said hub and said blade member; and a journal bearing within said connection supporting said blade member; said journal bearing including a plurality of relatively closely spaced bearing elements; elastic means molding said bearing elements with said connection; the edges of adjacent bearing elements being spaced apart sufficiently to permit independent alignment changes of said bearing elements.
Claim 2
Dependent Claim
98 words
A bearing mounting for an articulated helicopter rotor in which a rotor blade is connected to a rotor head hub; said hub having an opening therein; a rotor blade member extending within said hub opening; a plurality of elastomeric bearings connecting said hub and said blade member; and a journal bearing within said connection supporting said blade member; said journal bearing including a plurality of relatively closely spaced bearing elements; elastic means molding said bearing elements with said connection; the edges of adjacent bearing elements being spaced apart sufficiently to permit independent alignment changes of said bearing elements.
Claim 3
Dependent Claim
26 words
A bearing mounting according to claim 1 in which said elastomeric bearings include an annular, flat, laminated elastomeric bearing and an annular, spherical, laminated elastomeric bearing.
Claim 4
Dependent Claim
133 words
In a helicopter rotor structure, a bearing mounting for connecting a rotor blade to a rotor head hub; said hub having an opening therein; a rotor blade member extending within said hub opening; a connection for said blade member to said hub including: an annular, flat elastomeric bearing connected to an end of said blade member; a connecting member connected to said flat elastomeric bearing; and an annular, spherical elastomeric bearing connected to said connecting member and said hub; a plurality of relatively closely spaced journal bearing elements mounted within said connecting member and supporting said blade member; elastic means molding said bearing elements into said connecting member to form an integral bearing unit; the edges of adjacent bearing elements being spaced apart sufficiently to permit relative alignment changes between individual bearing elements.
Claim 5
Dependent Claim
133 words
In a helicopter rotor structure, a bearing mounting for connecting a rotor blade to a rotor head hub; said hub having an opening therein; a rotor blade member extending within said hub opening; a connection for said blade member to said hub including: an annular, flat elastomeric bearing connected to an end of said blade member; a connecting member connected to said flat elastomeric bearing; and an annular, spherical elastomeric bearing connected to said connecting member and said hub; a plurality of relatively closely spaced journal bearing elements mounted within said connecting member and supporting said blade member; elastic means molding said bearing elements into said connecting member to form an integral bearing unit; the edges of adjacent bearing elements being spaced apart sufficiently to permit relative alignment changes between individual bearing elements.
Claim 6
Dependent Claim
26 words
In a helicopter rotor structure, a bearing mounting in accordance with claim 3 in which the elements of the journal bearing are fully circumferential in extent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |