US4787641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for sealing a chamber containing pressure medium
Assignee: Valmet Technologies Oy
•
Filing: 1987-12-22
•
Granted: 1988-11-29
•
Expires: 2007-12-22
Abstract
Abstract An arrangement for sealing a chamber containing pressure medium against a movable band. The band is arranged to form one side of the chamber. The arrangement comprises a sealing framework which is fastened to a body part of the chamber by means of a resilient membrane. The sealing framework is further provided with a sealing means for providing a sealing effect between the movable band and the rest of the chamber. The sealing means is thereby arranged to be pressed against the band by the pressure effect of a load medium fed on one side of the resilient membrane. In order to obtain an effective and adaptable sealing effect, the means for providing the sealing effect is formed by at least two sealing elements arranged in parallel and between which a sealing liquid is provided.
Inventors
- 👤 Paavo Rautakorpi
- 👤 Pekka Majaniemi
- 👤 Jukka Lehtinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:25
CPC Classifications
B; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B30B5/062; D; D21; D21F; D21F3/00; D21F3/02; D21F3/0209; D21F5/00; D21F5/004; F; F16; F16J; F16J15/00; F16J15/16; F16J15/168; F16J15/40; Y; Y10; Y10S; Y10S277/00; Y10S277/906; Y10S277/93
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
An arrangement for sealing a chamber containing pressure medium against a movable band arranged to form one side of the chamber, comprising a sealing framework fastened to a body part of the chamber by means of a resilient membrane, a sealing means being arranged in said sealing framework for obtaining a sealing effect between the movable band and the rest of the chamber, whereby the sealing means is arranged to be pressed against the band by the pressure effect of a load medium to be fed on one side of the resilient membrane, said means for providing a sealing effect being formed by at least two sealing elements arranged in parallel and between which a sealing liquid is provided.
Claim 2
Dependent Claim
119 words
An arrangement for sealing a chamber containing pressure medium against a movable band arranged to form one side of the chamber, comprising a sealing framework fastened to a body part of the chamber by means of a resilient membrane, a sealing means being arranged in said sealing framework for obtaining a sealing effect between the movable band and the rest of the chamber, whereby the sealing means is arranged to be pressed against the band by the pressure effect of a load medium to be fed on one side of the resilient membrane, said means for providing a sealing effect being formed by at least two sealing elements arranged in parallel and between which a sealing liquid is provided.
Claim 3
Dependent Claim
21 words
An arrangement according to claim 1, wherein the load of the sealing elements against the band is arranged to be unequal.
Claim 4
Dependent Claim
14 words
An arrangement according to claim 1, wherein the sealing elements are different in profile.
Claim 5
Dependent Claim
15 words
An arrangement according to claim 1, wherein the sealing elements are made of different materials.
Claim 6
Dependent Claim
29 words
An arrangement according to claim 1, wherein each one of the sealing elements is positioned in a separate groove the bottom of which is provided with a depressurizing groove.
Claim 7
Dependent Claim
28 words
An arrangement according to claim 1, wherein said pressure medium consists of gaseous pressure medium and the sealing liquid consists of the condensation liquid of the pressure medium.
Claim 8
Dependent Claim
27 words
An arrangement according to claim 6 for sealing a chamber containing steam, wherein said gaseous pressure medium consists of steam and the sealing liquid consists of water.
References Cited (Backward Citations)
US2932183A
Cited
US2986911A
Cited
US3460359A
Cited
US3802961A
Cited
US3927540A
Cited
US3939576A
Cited
US4058435A
Cited
US4545764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |