Patent US3578803A successfully refreshed from Google Patents.
US3578803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide-ring seal
Assignee: Individual
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Filing: 1969-02-13
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Granted: 1971-05-18
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Expires: 1989-02-13
Abstract
Abstract A slide-ring seal for rotating shafts seals two spaces separated by a transverse wall. The seal comprises a seal ring rotating with the shaft and a counter-ring in the said wall. A helical spring urges the seal ring towards the counter-ring. An O-ring or sleeve seals the ring against the periphery of the shaft. The cross section of the spring wire is substantially greater in its radial direction than in its axial direction, the spring transmitting to the shaft the entire or a substantial part of the slide friction between the slide surfaces. The spring is of conical shape and exerts both axial and radial forces so as to effect sealing between the sleeve and the periphery of the shaft also.
Inventors
- 👤 Dieter Karl Wilhelm Huhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:59
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A slide-ring seal for sealing two spaces separated by a transverse wall with a rotating shaft passing through an aperture in said wall, said seal comprising: a counter-ring physically fixed and sealed about said aperture and having a flat surface radially disposed with respect to the centerline of said shaft; a seal ring rotatable with said shaft and sealed thereto and having a mating flat surface also radially disposed with respect to the centerline of said shaft for sealing against said first-mentioned flat surface of said counter-ring; and a pressure spring wire disposed in a coil about said shaft and fixed at one end thereto for exerting an abutting axially directed sealing force between the said flat surfaces of said counter-ring and said seal ring wherein said wire has a crosssectional shape having a radial dimension with respect to said centerline which is substantially greater than an axial dimension along said centerline thereby permitting the transfer of substantially all frictional forces between said rings through said spring wire to said shaft regardless of the direction of shaft rotation.
Claim 2
Dependent Claim
178 words
A slide-ring seal for sealing two spaces separated by a transverse wall with a rotating shaft passing through an aperture in said wall, said seal comprising: a counter-ring physically fixed and sealed about said aperture and having a flat surface radially disposed with respect to the centerline of said shaft; a seal ring rotatable with said shaft and sealed thereto and having a mating flat surface also radially disposed with respect to the centerline of said shaft for sealing against said first-mentioned flat surface of said counter-ring; and a pressure spring wire disposed in a coil about said shaft and fixed at one end thereto for exerting an abutting axially directed sealing force between the said flat surfaces of said counter-ring and said seal ring wherein said wire has a crosssectional shape having a radial dimension with respect to said centerline which is substantially greater than an axial dimension along said centerline thereby permitting the transfer of substantially all frictional forces between said rings through said spring wire to said shaft regardless of the direction of shaft rotation.
Claim 3
Dependent Claim
74 words
A slide-ring seal as in claim 1 further comprising: a sealing sleeve disposed about the periphery of said shaft for sealing said seal ring to said shaft and wherein said coil of spring wire is conically shaped and disposed about at least a portion of said sleeve for exerting an inwardly directed radial force upon said sleeve as well as said axially directed force thereby sealing said sleeve against the periphery of said shaft.
Claim 4
Dependent Claim
105 words
An improved ring seal in which a first flat surface rotating with a shaft is sealed against a second physically fixed flat surface by axial force from a coiled spring wire disposed about the shaft and which wire is physically fIxed at one end to said first flat surface and at the other end to said shaft, the improvement comprising; spring wire having a substantially greater radial than axial cross-sectional dimension with respect to the centerline of said shaft thereby permitting efficient transfer of frictional forces occurring between said flat surfaces through said spring wire to said shaft irrespective of the direction of shaft rotation.
Claim 5
Dependent Claim
105 words
An improved ring seal in which a first flat surface rotating with a shaft is sealed against a second physically fixed flat surface by axial force from a coiled spring wire disposed about the shaft and which wire is physically fIxed at one end to said first flat surface and at the other end to said shaft, the improvement comprising; spring wire having a substantially greater radial than axial cross-sectional dimension with respect to the centerline of said shaft thereby permitting efficient transfer of frictional forces occurring between said flat surfaces through said spring wire to said shaft irrespective of the direction of shaft rotation.
Claim 6
Dependent Claim
14 words
An improvement as in claim 3 wherein said wire has a rectangular cross-sectional shape.
Claim 7
Dependent Claim
58 words
An improvement as in claim 3 wherein said coiled spring wire is coiled in a conical shape for simultaneously exerting axial and radial forces when compressed thereby effecting radial sealing forces for se in sealing said first flat surface against said shaft as well as axial forces for use in urging said first and second flat surfaces together.
References Cited (Backward Citations)
CA708400A
Cited
US2999709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |