US3889923A — Leakage resistant fitting

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.

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

Leakage resistant fitting

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