US4221390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact seal
Assignee: Ovivo UK Ltd
•
Filing: 1978-08-10
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Granted: 1980-09-09
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Expires: 1998-08-10
Abstract
Abstract A seal between a surface and an edge or further surface movable with respect to the first surface in a plane parallel to it. A sealing member projects from a seal housing and can move through a predetermined distance with respect to the housing. The sealing member is resiliently urged into the position in which it projects as far as possible beyond the housing.
Inventors
- 👤 George E. Bainbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:01
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3208; B; B01; B01D; B01D33/00; B01D33/06; B01D33/067; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
229 words
Apparatus for screening contaminated liquids, which comprises a screen housing, a screening portion, which screening portion is movable along a predetermined path with respect to the screen housing, a member having a contact surface and fixed to one of the screen housing and the screening portion and sealing means for forming a seal with the contact surface and fixed to the other of the screen housing and the screening portion, the sealing means comprising a seal housing, the seal housing having a first wall, which first wall has an aperture therein, a second wall opposite the first wall, and two opposed side walls joining the first and second walls, a sealing member, which sealing member is movable towards and away from the second wall and has a first portion and a second portion, the first portion being within the seal housing and being wider than the aperture to maintain the first portion captive in the housing, and the second portion projecting through the aperture for contacting the contact surface, and a body of resilient material, the body of resilient material being interposed between the second wall and the first portion of the sealing member and contacting the side walls, movement of the sealing member towards the second wall compressing the resilient material and the resilient material, when compressed, tending to urge the sealing member away from the second wall.
Claim 2
Dependent Claim
229 words
Apparatus for screening contaminated liquids, which comprises a screen housing, a screening portion, which screening portion is movable along a predetermined path with respect to the screen housing, a member having a contact surface and fixed to one of the screen housing and the screening portion and sealing means for forming a seal with the contact surface and fixed to the other of the screen housing and the screening portion, the sealing means comprising a seal housing, the seal housing having a first wall, which first wall has an aperture therein, a second wall opposite the first wall, and two opposed side walls joining the first and second walls, a sealing member, which sealing member is movable towards and away from the second wall and has a first portion and a second portion, the first portion being within the seal housing and being wider than the aperture to maintain the first portion captive in the housing, and the second portion projecting through the aperture for contacting the contact surface, and a body of resilient material, the body of resilient material being interposed between the second wall and the first portion of the sealing member and contacting the side walls, movement of the sealing member towards the second wall compressing the resilient material and the resilient material, when compressed, tending to urge the sealing member away from the second wall.
Claim 3
Dependent Claim
14 words
Apparatus as claimed in claim 1, wherein the resilient material comprises resilient foam material.
Claim 4
Dependent Claim
14 words
Apparatus as claimed in claim 2, wherein the resilient foam material is neoprene foam.
Claim 5
Dependent Claim
21 words
Apparatus as claimed in claim 1, wherein the sealing member is constructed from a material having a low coefficient of friction.
Claim 6
Dependent Claim
14 words
Apparatus as claimed in claim 4, wherein the sealing member is constructed from polytetrafluoroethylene.
Claim 7
Dependent Claim
26 words
Apparatus as claimed in claim 1, wherein the seal housing is elongate and the aperture is a slot extending along the length of the seal housing.
Claim 8
Dependent Claim
35 words
Apparatus as claimed in claim 1 having the form of a band screen, the member having the contact surface being fixed to the screening portion and the sealing means being fixed to the screen housing.
Claim 9
Dependent Claim
35 words
Apparatus as claimed in claim 1 having the form of a cup screen, the sealing means being fixed to the screening portion and the member having the contact surface being fixed to the screen housing.
Claim 10
Dependent Claim
39 words
Apparatus as claimed in claim 1, wherein the sealing means is fixed to the screening portion and the member having the contact surface is fixed to the screen housing, part of the predetermined path being outside the screen housing.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |