Patent US4379560A successfully refreshed from Google Patents.
US4379560A
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Turbine seal
Assignee: FERN ENGR
•
Filing: 1981-08-13
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Granted: 1983-04-12
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Expires: 2001-08-13
Abstract
Abstract Seal for two concentric tubular elements of a gas turbine, consisting of rings associated with each element and having facing grooves, and of a connector extending between the grooves and consisting of two annuli which are in concentric spaced relationship and are joined by a web.
Inventors
- 👤 Gordon J. Bakken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:02
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/023; F01D11/00; F01D11/005; F01D25/00; F01D25/24; F01D25/246; F23; F23R; F23R3/00; F23R3/42; F23R3/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
Turbine seal, comprising: (a) an outer tubular element, (b) an inner tubular element, the elements being concentric and radially spaced, (c) a first ring joined to the outer tubular element, the ring having an inwardly-directed groove, (d) a second ring joined to the inner tubular element, the ring having an outwardly-directed groove, each groove of the first and second rings being with spaced, parallel radial surfaces, and (e) a junction element in the form of a washer having an outer peripheral edge lying in the inwardly-directed groove and an inner peripheral edge lying in the outwardly-directed groove, the edge of the junction element lying in each groove having an annular enlargement of circular cross-section that fits snugly between the radial surfaces, the grooves in the first and second rings having a depth in the radial direction that is at least greater than the minor diameter of the enlargement.
Claim 2
Dependent Claim
148 words
Turbine seal, comprising: (a) an outer tubular element, (b) an inner tubular element, the elements being concentric and radially spaced, (c) a first ring joined to the outer tubular element, the ring having an inwardly-directed groove, (d) a second ring joined to the inner tubular element, the ring having an outwardly-directed groove, each groove of the first and second rings being with spaced, parallel radial surfaces, and (e) a junction element in the form of a washer having an outer peripheral edge lying in the inwardly-directed groove and an inner peripheral edge lying in the outwardly-directed groove, the edge of the junction element lying in each groove having an annular enlargement of circular cross-section that fits snugly between the radial surfaces, the grooves in the first and second rings having a depth in the radial direction that is at least greater than the minor diameter of the enlargement.
Claim 3
Dependent Claim
51 words
Turbine seal as recited in claim 1, wherein the enlargement at the outer edge of the junction elements is joined to the enlargement at the inner edge by a thin-walled web, and wherein the junction element is formed of a metal permitting limited axial displacement between the two enlargements without damage.
Claim 4
Dependent Claim
44 words
Turbine seal as recited in claim 2, wherein the radial width of the web is several times the minor diameter of the enlargement, and wherein the said minor diameter of the outer edge enlargement is the same as that of the inner edge enlargement.
References Cited (Backward Citations)
US1073916A
Cited
US1807460A
Cited
US2919891A
Cited
US3056615A
Cited
US3458207A
Cited
US3398978A
Cited
US3645092A
Cited
US3704034A
Cited
US3771798A
Cited
US3889958A
Cited
US4063845A
Cited
GB1534660A
Cited
US4072327A
Cited
US4188037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |