US4667967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft sealing system with lip and labyrinth seals
Assignee: Goetze GmbH
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Filing: 1986-10-03
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Granted: 1987-05-26
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Expires: 2006-10-03
Abstract
Abstract A shaft seal assembly adapted for installation on and concentrically with a rotary shaft for sealing off a chamber laden with a gas/liquid mixture from a space situated externally of the chamber. The assembly has a chamber side and an air side and further comprises a sealing lip circumferentially surrounding a stationary part of the assembly; a labyrinth sealing ring situated axially adjacent the sealing sleeve on the chamber side of the assembly. The labyrinth sealing ring comprises a rotary wall component and a stationary wall component together defining a labyrinth gap formed of a plurality of consecutive axial and radial passages for guiding the mixture in a path having a plurality of radial and axial deflections. The shaft seal assembly further has a liquid return device situated between the sealing lip and the labyrinth sealing ring as viewed along a path of propagation of the mixture in the assembly; and a radially oriented, operationally stationary return channel situated between the sealing lip and the labyrinth sealing ring for returning liquid from the assembly into the chamber in a radially outward direction.
Inventors
- 👤 Hans Deuring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:17
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/54; F16J15/002; F16J15/004
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
184 words
In a shaft seal assembly adapted for installation on and concentrically with a rotary shaft for sealing off a chamber laden with a gas/liquid mixture from a space situated externally of the chamber; the assembly having a chamber side and an air side and further comprising a sealing lip circumferentially surrounding a stationary part of the assembly; a labyrinth sealing ring situated axially adjacent said sealing sleeve on the chamber side of the assembly; the improvement wherein said labyrinth sealing ring comprises a rotary wall component and a stationary wall component together defining a labyrinth gap formed of a plurality of consecutive axial and radial passages for guiding the mixture in a path having a plurality of radial and axial deflections; further comprising a liquid return device situated between said sealing lip and said labyrinth sealing ring as viewed along a path of propagation of the mixture in said assembly; and means defining a radially oriented, operationally stationary return channel situated between said sealing lip and said labyrinth sealing ring for returning liquid from the assembly into the chamber in a radially outward direction.
Claim 2
Dependent Claim
184 words
In a shaft seal assembly adapted for installation on and concentrically with a rotary shaft for sealing off a chamber laden with a gas/liquid mixture from a space situated externally of the chamber; the assembly having a chamber side and an air side and further comprising a sealing lip circumferentially surrounding a stationary part of the assembly; a labyrinth sealing ring situated axially adjacent said sealing sleeve on the chamber side of the assembly; the improvement wherein said labyrinth sealing ring comprises a rotary wall component and a stationary wall component together defining a labyrinth gap formed of a plurality of consecutive axial and radial passages for guiding the mixture in a path having a plurality of radial and axial deflections; further comprising a liquid return device situated between said sealing lip and said labyrinth sealing ring as viewed along a path of propagation of the mixture in said assembly; and means defining a radially oriented, operationally stationary return channel situated between said sealing lip and said labyrinth sealing ring for returning liquid from the assembly into the chamber in a radially outward direction.
Claim 3
Dependent Claim
38 words
A shaft seal assembly as defined in claim 1, further comprising a radial projection forming part of said rotary wall component and being oriented towards said return channel, said radial projection forming an end of said labyrinth gap.
Claim 4
Dependent Claim
17 words
A shaft seal assembly as defined in claim 2, wherein said radial projection has a chamfered terminus.
Claim 5
Dependent Claim
49 words
A shaft seal assembly as defined in claim 1, wherein said stationary part comprises a stationary ring; and further wherein said liquid return device has a rotary part having a screw-thread face being in a sliding engagement with said stationary ring and being situated adjacent said labyrinth sealing ring.
Claim 6
Dependent Claim
55 words
A shaft seal assembly as defined in claim 1, further comprising a housing ring arranged to surround the shaft and to rotate therewith; said liquid return device comprising an elastomer part; and a sealing sleeve having an end forming said sealing lip; said sealing sleeve and said elastomer part being bonded to said housing ring.
Claim 7
Dependent Claim
40 words
A shaft seal assembly as defined in claim 1, wherein said stationary part comprises a stationary ring having an end situated adjacent said labyrinth ring seal; said end of said stationary ring having a radial projection including a chamfered end.
Claim 8
Dependent Claim
52 words
A shaft seal assembly as defined in claim 1, further comprising a sealing sleeve having an end forming said sealing lip; a space defined together by said sealing sleeve and said stationary part; and a polymer filling contained in said space; said filling and said stationary part together defining a narrow clearance.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |