Patent US3917288A successfully refreshed from Google Patents.
US3917288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing seal
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1973-05-31
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Granted: 1975-11-04
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Expires: 1993-05-31
Abstract
Abstract A packing seal for closing the space between a rotating shaft and a stationary machine part is described. A ring is located in an annular slot formed in one of the shaft or machine parts. The ring is tensioned radially on the rotating or on the non-rotating part and axially spaced from the frontal faces of the slot so that a fluid media can be located therebetween. At least one face of the ring has a plurality of arcuate grooves by which the pressure of the fluid medium between the ring and the opposing frontal face of the slot is generated on rotation of said shaft.
Inventors
- 👤 Wolfgang Huber
- 👤 Anton Marx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:48
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441; F16J15/16; F16J15/32; F16J15/3268; F16J15/3272; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412; F16J15/40; F16J15/406
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A seal for closing the space between a rotating shaft and a stationary machine part comprising an annular ring located in an annular slot formed in a circumferential surface of one of said shaft or machine parts, said ring being tensioned radially on one of the rotating or non-rotating parts and axially spaced from at least one of the frontal faces of said slot for the introduction of a fluid media therebetween, at least the face of said ring opposed to the spaced frontal face of said slot having a plurality of arcuate grooves comprising spiral sections uniformly spaced about the face of said ring parallel to each other and extending curvedly in the same direction with respect to the direction of rotation of said shaft from the inner edge to the outer edge of said ring, said arcuate grooves generating a centripetal flow creating pressure in said fluid medium located between the frontal face of the slot and the opposing face of the ring on rotation of said shaft.
Claim 2
Dependent Claim
170 words
A seal for closing the space between a rotating shaft and a stationary machine part comprising an annular ring located in an annular slot formed in a circumferential surface of one of said shaft or machine parts, said ring being tensioned radially on one of the rotating or non-rotating parts and axially spaced from at least one of the frontal faces of said slot for the introduction of a fluid media therebetween, at least the face of said ring opposed to the spaced frontal face of said slot having a plurality of arcuate grooves comprising spiral sections uniformly spaced about the face of said ring parallel to each other and extending curvedly in the same direction with respect to the direction of rotation of said shaft from the inner edge to the outer edge of said ring, said arcuate grooves generating a centripetal flow creating pressure in said fluid medium located between the frontal face of the slot and the opposing face of the ring on rotation of said shaft.
Claim 3
Dependent Claim
37 words
The system according to claim 1 wherein the grooves are formed on both sides of said ring, said grooves conforming and both sides being arcuately directed in the same direction with respect to the direction of rotation.
Claim 4
Dependent Claim
23 words
The system according to claim 1 wherein said ring is axially movable in said slot and is responsive to an increase in pressure.
Claim 5
Dependent Claim
47 words
The system according to claim 3 wherein fluid under pressure is supplied to said seal to normally urge the frontal face of said ring into said contact with the face of said slot, said increase of pressure creating a resilient counter force maintaining said seal in equilibrium.
Claim 6
Dependent Claim
18 words
The apparatus according to claim 1 wherein said seal comprises a plurality of rings spaced from each other.
Claim 7
Dependent Claim
67 words
The system according to claim 1 wherein said shaft is provided with a pair of slots, each having a ring located therein, and the means for delivering the fluid media is located between said rings, said rings having arcuate grooves formed in the axially outer face thereof conforming to each other and extending in the same direction with respect to the direction of rotation of said shaft.
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) | 1978-11-03 | 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 |