Patent US3917150A successfully refreshed from Google Patents.
US3917150A
Expired / Lapsed
US
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Seals and method of manufacture thereof
Assignee: Rolls Royce PLC
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Filing: 1974-11-15
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Granted: 1975-11-04
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Expires: 1994-11-15
Abstract
Abstract A method of manufacture of an annular seal element comprises the steps of providing an apertured backing ring with closely packed bristles extending radially outwardly from the circumference thereof, clamping the free ends of the bristle between a pair of co-axial rings and welding the rings and the outermost tips of the bristles into a unitary structure and subsequently machining away the original backing ring to leave the rings with radially inwardly extending bristles. The invention also includes a sealing element made by the method.
Inventors
- 👤 John Gilbert Ferguson
- 👤 Geoffrey Dallinger Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/001; F04; F04D; F04D29/00; F04D29/08; F04D29/083; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3288; F05; F05D; F05D2240/00; F05D2240/55; F05D2240/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A method of manufacturing a seal element comprising the steps of making a brush having a plurality of tightly packed bristles secured to and projecting from a surface of a backing member, clamping the free ends of the bristles between a pair of clamping members, integrally joining the clamping members and the tips of the bristles, and subsequently removing the backing member and the ends of the bristles attached thereto.
Claim 2
Independent Claim
70 words
A method of manufacturing a seal element comprising the steps of making a brush having a plurality of tightly packed bristles secured to and projecting from a surface of a backing member, clamping the free ends of the bristles between a pair of clamping members, integrally joining the clamping members and the tips of the bristles, and subsequently removing the backing member and the ends of the bristles attached thereto.
Claim 3
Dependent Claim
26 words
A method according to claim 1 and in which the bristles and clamping rings are metallic and are integrally joined by welding, brazing of diffusion bonding.
Claim 4
Dependent Claim
40 words
A method according to claim 1 and wherein the bristles are made to project at an angle to the surface of the backing member, whereby in the finished seal element, the bristles project at an angle from the clamping members.
Claim 5
Dependent Claim
55 words
A method according to claim 1 and wherein the bAcking member is annular and the bristles project radially from the radially inner circumferential surface thereof, and the clamping members are co-axial rings which clamp the free radially inner ends of the bristles whereby the resulting seal element is annular and has radially outwardly extending bristles.
Claim 6
Dependent Claim
55 words
A method according to claim 1 and wherein the backing member is annular and the bristles project radially from the radially outer circumferential surface thereof, and the clamping members are co-axial rings which clamp the free radially outer ends of the bristles whereby the resulting seal element is annular and has radially inwardly extending bristle.
Claim 7
Dependent Claim
10 words
A seal element manufactured by the method according to claim
References Cited (Backward Citations)
US3050891A
Cited
US3807620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |