Patent US4067583A successfully refreshed from Google Patents.
US4067583A
Expired / Lapsed
US
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Sealing device with closure system for compressor
Assignee: Safran Aircraft Engines SAS
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Filing: 1976-12-21
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Granted: 1978-01-10
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Expires: 1996-12-21
Abstract
Abstract The device comprises a driving mechanism, disconnectable coupling means, aotor in which is conveyed a toxic gas, and an annular seal clamped between stationary knife-edges on the rotor and movable knife-edges associated with a movable annular support unit. A closure control element consisting of an annular jack causes the annular support unit to move between an inactive position and an active position and conversely. A second control element consisting of a resilient washer applies a complementary force to the annular support unit under the action of withdrawal of the driving mechanism.
Inventors
- 👤 Roger Louis Elysee Germain
- 👤 Claude Eugene Desire Duquenne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:36
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/143; Y; Y10; Y10S; Y10S277/00; Y10S277/929
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
169 words
A sealing device with closure system for a rotary machine having a vertical axis of rotation, comprising a driving mechanism, disconnectable coupling means and a rotor in which a noxious fluid is conveyed, an annular seal in a plane at right angles to said axis of rotation and clamped between stationary knife-edges on an annular support unit moving along said axis, two closure control means operated successively, the first of said control means effecting the displacement of said annular support unit between an inactive position and an active position and conversely actuated externally of the machine and the second of said control means exerting a complementary effort on said annular support unit upon withdrawal of said driving mechanism, said second control means being a resilient member applied on one side against a ring retaining said annular support unit and applied on the other side against a ring rigidly fixed to said driving mechanism in an inactive position and against a stop integral with said rotor in an active position.
Claim 2
Dependent Claim
169 words
A sealing device with closure system for a rotary machine having a vertical axis of rotation, comprising a driving mechanism, disconnectable coupling means and a rotor in which a noxious fluid is conveyed, an annular seal in a plane at right angles to said axis of rotation and clamped between stationary knife-edges on an annular support unit moving along said axis, two closure control means operated successively, the first of said control means effecting the displacement of said annular support unit between an inactive position and an active position and conversely actuated externally of the machine and the second of said control means exerting a complementary effort on said annular support unit upon withdrawal of said driving mechanism, said second control means being a resilient member applied on one side against a ring retaining said annular support unit and applied on the other side against a ring rigidly fixed to said driving mechanism in an inactive position and against a stop integral with said rotor in an active position.
Claim 3
Dependent Claim
16 words
A device according to claim 1, wherein said first closure control means is an annular jack.
Claim 4
Dependent Claim
29 words
A device according to claim 2, said annular jack having at least one stationary wall and one movable wall joined together by semi-toric diaphragms connected tangentially to said walls.
Claim 5
Dependent Claim
12 words
A device according to claim 3, wherein said diaphragms are metallic diaphragms.
Claim 6
Dependent Claim
15 words
A device according to claim 4, wherein said metallic diaphragms are welded to said walls.
Claim 7
Dependent Claim
13 words
A device according to claim 1, wherein said resilient member is a washer.
Claim 8
Dependent Claim
29 words
A device according to claim 1, wherein a stop washer rigidly fixed to said annular support unit cooperates with said retaining ring to limit the wear of the seal.
Claim 9
Dependent Claim
23 words
A device according to claim 1, including a resilient washer for returning said annular support unit and for counteracting said two control means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |