US4765810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testable gasket seal arrangement
Assignee: Clestra Hauserman SA
•
Filing: 1987-06-08
•
Granted: 1988-08-23
•
Expires: 2007-06-08
Abstract
Abstract A selective fluid flow control device has a control element which is held in sealing relationship with a housing, with first and second seals being formed to confine the fluid flow through the control element. The first and second seals define a sealed chamber from which the fluid is excluded, and a gas conduit communicates between outside of the housing and the sealed chamber for applying a test pressure to the chamber to test the quality of these seals. In a preferred embodiment, the selective fluid control device is a filter arrangement for a clean room or the like, and the seals are formed against the filter gasket by a seating arrangement formed of an extruded rail that has a web and first and second ribs, the ribs being biased against the gasket.
Inventors
- 👤 Lawrence E. Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:22
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/42; B01D2271/00; B01D2271/02; B01D2273/00; B01D2273/18
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
180 words
A selective fluid control device in which a control element, through which a fluid passes, is held in a sealing relationship with a housing therefor, with first and second sealing means for isolating the fluid flow through the control element and with a portion of the housing defining a sealed chamber from which said fluid is to be excluded; wherein said device further comprises a gas conduit communicating between outside said housing and said sealed chamber for applying a test pressure condition to said chamber to test the quality of the seals formed by said first and second sealing means with respect to said control element; and in which said control element is a filter for removing particulates or other impurities from the fluid, and said first and second sealing means include a rail having first and second sealing ribs and a sealing gasket, with one of said rail and said gasket being formed on said filter and the other thereof being formed on said housing, the ribs mating with said gasket to form an annular space as said chamber.
Claim 2
Dependent Claim
180 words
A selective fluid control device in which a control element, through which a fluid passes, is held in a sealing relationship with a housing therefor, with first and second sealing means for isolating the fluid flow through the control element and with a portion of the housing defining a sealed chamber from which said fluid is to be excluded; wherein said device further comprises a gas conduit communicating between outside said housing and said sealed chamber for applying a test pressure condition to said chamber to test the quality of the seals formed by said first and second sealing means with respect to said control element; and in which said control element is a filter for removing particulates or other impurities from the fluid, and said first and second sealing means include a rail having first and second sealing ribs and a sealing gasket, with one of said rail and said gasket being formed on said filter and the other thereof being formed on said housing, the ribs mating with said gasket to form an annular space as said chamber.
Claim 3
Dependent Claim
160 words
A ball valve having as a control element a rotatable ball with a through passage extending perpendicular to its axis of rotation, and a housing defining a sealed chamber for the rotatable ball including an entrance port, an exit port, first and second sealing means for isolating fluid flow through the rotatable ball in a fully open position and sealing against said ball in a fully closed position, means surrounding said entrance and exit ports for holding said first and second sealing means against said ball to define a sealed chamber within said housing when said ball is in its fully open and its fully closed positions; and a gas conduit communicating between outside said housing and said sealed chamber for applying a test pressure condition to said chamber to test the quality of the seals formed by said first and second sealing means with respect to said rotatably ball in either the fully open or fully closed positions thereof.
Claim 4
Dependent Claim
160 words
A ball valve having as a control element a rotatable ball with a through passage extending perpendicular to its axis of rotation, and a housing defining a sealed chamber for the rotatable ball including an entrance port, an exit port, first and second sealing means for isolating fluid flow through the rotatable ball in a fully open position and sealing against said ball in a fully closed position, means surrounding said entrance and exit ports for holding said first and second sealing means against said ball to define a sealed chamber within said housing when said ball is in its fully open and its fully closed positions; and a gas conduit communicating between outside said housing and said sealed chamber for applying a test pressure condition to said chamber to test the quality of the seals formed by said first and second sealing means with respect to said rotatably ball in either the fully open or fully closed positions thereof.
Claim 5
Dependent Claim
66 words
A ball valve according to claim 2 in which said valve includes a hollow rotatable valve stem affixed on said ball and extending through said housing, and having means thereon to effect rotation of said ball, and said gas conduit includes means for injecting gas through said hollow stem into the sealed chamber formed by said ball, said housing, and said first and second sealing means.
Claim 6
Dependent Claim
142 words
A double-wedge gate valve comprising a housing and, as a control element, a pair of wedges which are selectively raised and lowered in said housing with respect to a pair of valve seats, said housing having an inlet port and an outlet port, first and second sealing means for isolating fluid flow into said housing when said wedges are lowered into engagement with said valve seats, said sealing means being disposed to seal said wedges against their respective valve seats; means extending through said housing for selectively raising and lowering said wedges; third sealing means for sealing said raising and lowering means against said housing; and a gas conduit communicating between outside said housing and inside thereof for applying a test pressure condition within said housing to test the quality of the seals formed by said first, second, and third sealing means.
Claim 7
Dependent Claim
142 words
A double-wedge gate valve comprising a housing and, as a control element, a pair of wedges which are selectively raised and lowered in said housing with respect to a pair of valve seats, said housing having an inlet port and an outlet port, first and second sealing means for isolating fluid flow into said housing when said wedges are lowered into engagement with said valve seats, said sealing means being disposed to seal said wedges against their respective valve seats; means extending through said housing for selectively raising and lowering said wedges; third sealing means for sealing said raising and lowering means against said housing; and a gas conduit communicating between outside said housing and inside thereof for applying a test pressure condition within said housing to test the quality of the seals formed by said first, second, and third sealing means.
Claim 8
Dependent Claim
154 words
In a filter arrangement for a clean room or the like in which a filter removes particulates or other impurities from a fluid, a gasket arrangement is disposed in contact with said filter to define an inlet area surrounded by the gasket arrangement, and a filter mounting arrangement mounts said filter and has an annular seat which mates against said gasket arrangement to form a substantially fluid-tight seal with the gasket arrangement biased between said filter and said seat; the improvement wherein said gasket arrangement and said seat together comprise means forming inner and outer annular seals around the periphery of said filter inlet area to form a sealed test chamber between the inner and outer annular seals, and a gas conduit communicates with said sealed test chamber for applying a test pressure condition to said chamber to test the quality of the seals formed by said filter, said gasket arrangement, and said seat.
Claim 9
Dependent Claim
154 words
In a filter arrangement for a clean room or the like in which a filter removes particulates or other impurities from a fluid, a gasket arrangement is disposed in contact with said filter to define an inlet area surrounded by the gasket arrangement, and a filter mounting arrangement mounts said filter and has an annular seat which mates against said gasket arrangement to form a substantially fluid-tight seal with the gasket arrangement biased between said filter and said seat; the improvement wherein said gasket arrangement and said seat together comprise means forming inner and outer annular seals around the periphery of said filter inlet area to form a sealed test chamber between the inner and outer annular seals, and a gas conduit communicates with said sealed test chamber for applying a test pressure condition to said chamber to test the quality of the seals formed by said filter, said gasket arrangement, and said seat.
Claim 10
Dependent Claim
35 words
A filter arrangement according to claim 5 in which said seat includes first and second ribs which extend around the periphery of the filter inlet area to form a sealing condition with said gasket arrangement.
Claim 11
Dependent Claim
28 words
A filter arrangement according to claim 6 in which said seat includes an extruded rail having a web and said first and second ribs are formed integrally therewith.
Claim 12
Dependent Claim
17 words
A filter arrangement according to claim 7 in which said extruded rail has a pi-shaped cross section.
Claim 13
Dependent Claim
26 words
A filter arrangement according to claim 7 in which said gas conduit includes a pipe that extends through one of said ribs into said sealed chamber.
Claim 14
Dependent Claim
26 words
A filter arrangement according to claim 7, in which said gasket includes a tray containing a fluid sealant into which the first and second ribs penetrate.
Claim 15
Dependent Claim
32 words
A filter arrangement according to claim 10 in which said gasket includes a resilient gasket member in said tray beneath said fluid sealant and against which said first and second ribs repose.
Claim 16
Dependent Claim
25 words
A filter arrangement according to claim 5 in which said gasket arrangement includes inner and outer annular gaskets which define the sealed test chamber therebetween.
Claim 17
Dependent Claim
30 words
A filter arrangement according to claim 5 in which said gasket arrangement includes an annular gasket member having inner and outer annular ribs which define the sealed test chamber therebetween.
References Cited (Backward Citations)
US333412A
Cited
US2536793A
Cited
US2766614A
Cited
US3834134A
Cited
US4019371A
Cited
US4202201A
Cited
US4324568A
Cited
US4373635A
Cited
US4349363A
Cited
US4344784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |