Patent US3867254A successfully refreshed from Google Patents.
US3867254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sealing a rotating plug in a nuclear reactor
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1973-09-11
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Granted: 1975-02-18
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Expires: 1993-09-11
Abstract
Abstract The invention relates to the sealing of a rotating plug in a nuclear reactor. The sealing arrangement comprises a friction track which is formed along the periphery of the top of a ring mounted on a stationary element. An annular base coaxial with the plug is secured in sealing-tight manner to the stationary bearing around the ring and the track by means of a seal which rests on the annular base and also on the friction track of the ring and which comprises at least one friction ring and a clamping spring ring. The seal is clamped against the friction track by retractable clamping means when the plug is stationary, the retractable clamping means being carried by a ring secured to the first-mentioned ring.
Inventors
- 👤 Robert Brandstetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:53
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; G21C13/073; G21C13/0735; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A device for sealing a nuclear reactor plug rotating in a stationary bearing and secured to a ring disposed above the stationary bearing and resting on an annular track positioned on the bearing comprising a second annular friction track on the entire periphery of the top part of the ring, an annular base coaxial with the plug and secured in sealing-tight manner to the stationary bearing around the ring and the track, an annular seal mounted on the annular base and bearing on the friction track of the ring, said seal comprising at least one friction ring, an annular spring ring above and engaging said friction ring, a resilient annular ring above and engaging said spring ring and an annular clamping spring ring above and engaging said resilient ring, and retractable means for clamping said seal against said friction track mounted above said seal and disposed in a second ring secured to said first ring.
Claim 2
Independent Claim
155 words
A device for sealing a nuclear reactor plug rotating in a stationary bearing and secured to a ring disposed above the stationary bearing and resting on an annular track positioned on the bearing comprising a second annular friction track on the entire periphery of the top part of the ring, an annular base coaxial with the plug and secured in sealing-tight manner to the stationary bearing around the ring and the track, an annular seal mounted on the annular base and bearing on the friction track of the ring, said seal comprising at least one friction ring, an annular spring ring above and engaging said friction ring, a resilient annular ring above and engaging said spring ring and an annular clamping spring ring above and engaging said resilient ring, and retractable means for clamping said seal against said friction track mounted above said seal and disposed in a second ring secured to said first ring.
Claim 3
Dependent Claim
32 words
A device according to claim 1, wherein said clamping means include an inflatable hollow seal disposed in a groove in said second ring in contact with the upper surface of said seal.
Claim 4
Dependent Claim
27 words
A device according to claim 1, wherein said clamping means include jacks mounted in recesses in said second ring and engaging the upper surface of said seal.
Claim 5
Dependent Claim
57 words
A device according to claim 1, wherein said clamping means include a flat ring parallel to said seal, rods connected to said flat ring extending through said second ring, electromagnets above said second ring acting on said rods moving said flat ring to a retracted position, and springs for clamping said flat ring on said seal. >
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |