US3667626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means
Assignee: Santrade Ltd
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Filing: 1969-07-31
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Granted: 1972-06-06
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Expires: 1989-07-31
Abstract
Abstract In a sealing means between two members that are movable in relation to each other, one of the members having a sealing ridge which ridge is movable towards the other of said members forming a slit therewith, the sealing ridge is provided with a surface facing said other member, said surface being parallel with the surface of said other member, means are provided for biasing the sealing ridge in the direction towards said other member.
Inventors
- 👤 Aldo Torelli
- 👤 Andre Jacquemet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:28
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/168
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
Slit seal for sealing a movable part from a pressure chamber, preferably for sealing a conveyor belt running through a pressure chamber, which slit seal consists essentially of a yieldably mounted sealing ridge forming a slit with the movable part through which slit pressure medium flows, and means subjecting said ridge to a counterpressure acting against the pressure of the pressure medium in the slit, the resultant of the counterpressure being opposed to and aligned with the resultant of the pressure in the slit, thereby avoiding a tilting moment on the ridge.
Claim 2
Dependent Claim
92 words
Slit seal for sealing a movable part from a pressure chamber, preferably for sealing a conveyor belt running through a pressure chamber, which slit seal consists essentially of a yieldably mounted sealing ridge forming a slit with the movable part through which slit pressure medium flows, and means subjecting said ridge to a counterpressure acting against the pressure of the pressure medium in the slit, the resultant of the counterpressure being opposed to and aligned with the resultant of the pressure in the slit, thereby avoiding a tilting moment on the ridge.
Claim 3
Dependent Claim
13 words
Slit as defined in claim 1, in which the counterpressure means are springs.
Claim 4
Dependent Claim
23 words
Slit seal as defined in claim 1, in which a fluid pressure medium is used for subjecting the sealing ridge to said counterpressure.
Claim 5
Dependent Claim
41 words
Slit seal as defined in claim 3 in a pressure chamber for a conveyor, in which a channel connects the pressure chamber to the sealing ridge, the pressure medium in the pressure chamber thus constituting the counterpressure for the sealing ridge.
Claim 6
Dependent Claim
30 words
Sealing means as defined in claim 3 in a pressure chamber for a conveyor, in which there are separate pressure sources for the sealing ridge and for the pressure chamber.
Claim 7
Dependent Claim
143 words
Slit seal for sealing a movable part from a pressure chamber, preferably for sealing a conveyor belt running through a pressure chamber, which slit seal consists essentially of a yieldably mounted sealing ridge forming a slit with the movable part through which slit pressure medium flows, and means subjecting said ridge to a counterpressure acting against the pressure of the pressure medium in the slit, the resultant of the counterpressure being opposed to the resultant of the pressure in the slit, thereby avoiding a tilting moment on the ridge, said sealing ridge being provided with a guiding device, comprising a lever arm projecting therefrom, and, at its free end, carrying a pneumatic cushion device adapted to be fed by air forming an air cushion spacing said pneumatic device from a reference surface, whereby the sealing ridge is held parallel with said reference surface.
Claim 8
Dependent Claim
143 words
Slit seal for sealing a movable part from a pressure chamber, preferably for sealing a conveyor belt running through a pressure chamber, which slit seal consists essentially of a yieldably mounted sealing ridge forming a slit with the movable part through which slit pressure medium flows, and means subjecting said ridge to a counterpressure acting against the pressure of the pressure medium in the slit, the resultant of the counterpressure being opposed to the resultant of the pressure in the slit, thereby avoiding a tilting moment on the ridge, said sealing ridge being provided with a guiding device, comprising a lever arm projecting therefrom, and, at its free end, carrying a pneumatic cushion device adapted to be fed by air forming an air cushion spacing said pneumatic device from a reference surface, whereby the sealing ridge is held parallel with said reference surface.
Claim 9
Dependent Claim
24 words
Slit seal as defined in claim 6 in a pressure chamber for a conveyor belt, in which the reference surface is the conveyor belt.
Claim 10
Dependent Claim
23 words
Slit seal as defined in claim 9, in which means are provided for supplying pressure media of different pressures to said two tubes.
Claim 11
Dependent Claim
29 words
Sealing means as defined in claim 1, in which the sealing ridge is attached to said pressure chamber along two parallel resilient tubes adapted to contain a pressure medium.
Claim 12
Dependent Claim
23 words
Slit seal as defined in claim 1, in which the slit has a constant thickness in the direction of the pressure medium flow.
Claim 13
Dependent Claim
23 words
Slit seal as defined in claim 6, in which the slit has a constant thickness in the direction of the pressure medium flow.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |