Patent US3889923A successfully refreshed from Google Patents.
US3889923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakage resistant fitting
Assignee: Pneudraulics Inc
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Filing: 1973-05-07
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Granted: 1975-06-17
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Expires: 1993-05-07
Abstract
Abstract A leakage resistant fitting for fluid handling systems. The fitting has two members with confronting boundary surfaces which define a potential interfacial leakage space between the members. One member has an integral resiliently flexible sealing flange bounded at one side by the boundary surface of the member, and means for urging the flange into sealing contact with the boundary surface of the other member to block fluid leakage through the interfacial leakage space. The described fitting is a valve in which the fitting members constitute a valve body and movable valve member, respectively. The valve body and member have fluid passages opening through their confronting boundary surfaces which are aligned for communication with one another when the valve member occupies its open position and are misaligned when the valve member occupies its closed position. The valve body has a resilient annular sealing flange surrounding the open end of its passage which is urged into sealing contact with the valve member by a compression screw threaded in the body passage to block fluid leakage between the body and valve member in both the open and closed positions of the member.
Inventors
- 👤 Eric J Saville
- 👤 Jr Raymond S Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:20
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/04; F16K5/0414; F16K5/0492
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
A leakage resistant fitting for fluid handling systems comprising: first and second relatively movable members having confronting boundary surfaces defining an intervening interfacial potential leakage space and fluid passages in said members, respectively, each opening at one end through the boundary surface of the respective member for conducting fluid through said fitting in a manner such that fluid flow occurs from one passage to the other acrosS said leakage space, means for retaining said members in assembled relation, said one end of the passage in one member being reduced in diameter to form at the latter passage end a radially inwardly projecting resiliently flexible annular sealing flange formed integrally with and comprising the same material as said latter member, said flange surrounding said one end of the passage in the latter member and being bounded at one side by said boundary surface of the latter member and at the other side by a surface facing the opposite end of the latter passage, and a compression sleeve threaded in the passage in said one member between said sealing flange and opposite passage end and engageable with said latter sealing flange surface for urging said sealing flange into fluid sealing contact with the boundary surface of the other member to block fluid leakage through said space.
Claim 2
Dependent Claim
214 words
A leakage resistant fitting for fluid handling systems comprising: first and second relatively movable members having confronting boundary surfaces defining an intervening interfacial potential leakage space and fluid passages in said members, respectively, each opening at one end through the boundary surface of the respective member for conducting fluid through said fitting in a manner such that fluid flow occurs from one passage to the other acrosS said leakage space, means for retaining said members in assembled relation, said one end of the passage in one member being reduced in diameter to form at the latter passage end a radially inwardly projecting resiliently flexible annular sealing flange formed integrally with and comprising the same material as said latter member, said flange surrounding said one end of the passage in the latter member and being bounded at one side by said boundary surface of the latter member and at the other side by a surface facing the opposite end of the latter passage, and a compression sleeve threaded in the passage in said one member between said sealing flange and opposite passage end and engageable with said latter sealing flange surface for urging said sealing flange into fluid sealing contact with the boundary surface of the other member to block fluid leakage through said space.
Claim 3
Dependent Claim
211 words
A leakage resistant fitting for fluid handling systems comprising: first and second relatively movable members having confronting boundary surfaces defining an intervening interfacial potential leakage space and fluid passages in said members, respectively, each opening at one end through the boundary surface of the respective member, means for retaining said members in assembled relation, one member having a resiliently flexible annular sealing flange formed integrally with and comprising the same material as said latter member, said flange surrounding said one end of the passage in the latter member and being bounded at one side by said boundary surface of the latter member, means for urging said sealing flange into fluid sealing contact with the boundary surface of the other member, and said members being relatively movable between valve open positions wherein said passages are aligned for communication with one another and said sealing flange engages the boundary surface of said other member about said one end of the passage in the latter member and valve closed positions wherein said passages are misaligned and said sealing flange engages the boundary surface of said other member at a location displaced from said one end of the passage in said other member to seal said one end of the passage in said one member.
Claim 4
Dependent Claim
211 words
A leakage resistant fitting for fluid handling systems comprising: first and second relatively movable members having confronting boundary surfaces defining an intervening interfacial potential leakage space and fluid passages in said members, respectively, each opening at one end through the boundary surface of the respective member, means for retaining said members in assembled relation, one member having a resiliently flexible annular sealing flange formed integrally with and comprising the same material as said latter member, said flange surrounding said one end of the passage in the latter member and being bounded at one side by said boundary surface of the latter member, means for urging said sealing flange into fluid sealing contact with the boundary surface of the other member, and said members being relatively movable between valve open positions wherein said passages are aligned for communication with one another and said sealing flange engages the boundary surface of said other member about said one end of the passage in the latter member and valve closed positions wherein said passages are misaligned and said sealing flange engages the boundary surface of said other member at a location displaced from said one end of the passage in said other member to seal said one end of the passage in said one member.
Claim 5
Dependent Claim
39 words
A leakage resistant fitting according to claim 2 wherein: said members are relatively movable in rotation between said open and closed positions, and said boundary surfaces are circularly curved about the axis of the relative rotation of said members.
Claim 6
Dependent Claim
50 words
A leakage resistant fitting according to claim 1 wherein: said sealing flange has a relatively rigid annular body concentrically disposed within and radially spaced from the wall of the passage in said one member, and a relatively thin resiliently flexible annular web integrally joining said one member and flange body.
Claim 7
Dependent Claim
190 words
A leakage resistant fitting for fluid handling systems comprising: a first member having a bore with a central axis and a second member slidable in said bore, whereby said members have confronting inner and outer boundary surfaces, respectively, circularly curved about the axis of said bore and defining an intervening interfacial potential leakage space, said members having fluid passages, respectively, each opening at one end through the boundary surfaces of the respective member for conducting fluid through said fitting in a manner such that fluid flow occurs from one passage to the other across said leakage space, means for retaining said members in assembled relation, one member having a resiliently flexible annular sealing flange formed integrally with and comprising the same material as said latter member, said flange surrounding said one end of the passage in the latter member and being bounded at one side by said boundary surface of the latter member, and means for urging said sealing flange into fluid sealing contact with the boundary surface of the other member to block fluid leakage through said space to and frOm at least the passage in said one member.
Claim 8
Dependent Claim
190 words
A leakage resistant fitting for fluid handling systems comprising: a first member having a bore with a central axis and a second member slidable in said bore, whereby said members have confronting inner and outer boundary surfaces, respectively, circularly curved about the axis of said bore and defining an intervening interfacial potential leakage space, said members having fluid passages, respectively, each opening at one end through the boundary surfaces of the respective member for conducting fluid through said fitting in a manner such that fluid flow occurs from one passage to the other across said leakage space, means for retaining said members in assembled relation, one member having a resiliently flexible annular sealing flange formed integrally with and comprising the same material as said latter member, said flange surrounding said one end of the passage in the latter member and being bounded at one side by said boundary surface of the latter member, and means for urging said sealing flange into fluid sealing contact with the boundary surface of the other member to block fluid leakage through said space to and frOm at least the passage in said one member.
Claim 9
Dependent Claim
167 words
A leakage resistant fitting according to claim 5 wherein: said sealing flange has a relatively rigid annular body concentrically disposed within and radially spaced by a narrow annular clearance space from the wall of the passage in said one member, a seating face on said flange body at the other side of said flange, and a relatively thin annular resilient web extending across the end of said clearance space adjacent said bore and joining said one member and flange body, the axial depth of said annular clearance space relative to said flange seating face varying about the flange in a manner such that said flange has a generally uniform thickness about its full circumferential extent, said flange body and web are bounded at said one side of the flange by said boundary surface of said one member, and said urging means comprises a compression screw threaded in said passage of said one member and against said flange seating face to urge said flange against said other member.
Claim 10
Dependent Claim
110 words
A leakage resistant fitting according to claim 6 wherein: said fitting is a valve, said one member comprises the valve body, said other member comprises a valve member movable in said body bore between a valve open position wherein said passages are aligned for communication with one another and said sealing flange engages said other member about said one end of its passage and a valve closed position wherein said passages are misaligned and said sealing flange engages the boundary surface of said movable valve member at a location spaced from said one end of the passage in the latter member to seal said one end of said body passage.
Claim 11
Dependent Claim
27 words
A leakage resistant fitting according to claim 7 wherein: said movable valve member is rotatable about the axis of said body bore between open and closed positions.
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |