US3768505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain check valve and mounting means
Assignee: BKB CO
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Filing: 1971-04-28
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Granted: 1973-10-30
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Expires: 1991-04-28
Abstract
Abstract A drain check valve using a peripheral mounting gasket compressionally loaded to bind itself against the interior of a pipe, with the maximum amount of compressive loading being fixed by a mechanical stop. A valve is guided in the unit by a guide post engaging the float internally away from liquid flow. A vent is available to communicated gases to atmosphere.
Inventors
- 👤 B Benke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/04; E03F5/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
435 words
A drain check valve in a drain combination including a sewer drain pipe having an upper open bell portion connected to a lower smaller diameter conduit portion by a shoulder defining a surface, a fitting ring having one end portion resting on said surface and having another end portion terminating approximately level with said upper open bell portion, said fitting ring having an outer surface having a recessed wall portion and defining an annular chamber with said upper open bell portion, said fitting ring having an inner surface having a wall thereon defining a shoulder, cement in said annular chamber and in said recessed wall portion of said fitting ring to hold said fitting ring fixedly in position, said check valve comprising a lower body member having upper and lower end portions and having a bore extending therethrough, said upper end portion of said lower body member having a stop surface and a force applying surface thereon, an upper body member having upper and lower end portions and having a bore extending therethrough generally coaxially with said bore in said lower body member, wall means in said upper body member bore defining a valve seat, said lower end portion of said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding said lower end portion of said upper body member and located between said force applying surfaces on said upper and lower body members respectively, a plurality of generally axially extending bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand into contact with said inner surface of said fitting ring below said shoulder thereon, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, an axially extending valve guide secured to said lower end portion of said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member, and a vent opening in said upper body member for providing communication from said bore of said lower body member to atmosphere.
Claim 2
Dependent Claim
435 words
A drain check valve in a drain combination including a sewer drain pipe having an upper open bell portion connected to a lower smaller diameter conduit portion by a shoulder defining a surface, a fitting ring having one end portion resting on said surface and having another end portion terminating approximately level with said upper open bell portion, said fitting ring having an outer surface having a recessed wall portion and defining an annular chamber with said upper open bell portion, said fitting ring having an inner surface having a wall thereon defining a shoulder, cement in said annular chamber and in said recessed wall portion of said fitting ring to hold said fitting ring fixedly in position, said check valve comprising a lower body member having upper and lower end portions and having a bore extending therethrough, said upper end portion of said lower body member having a stop surface and a force applying surface thereon, an upper body member having upper and lower end portions and having a bore extending therethrough generally coaxially with said bore in said lower body member, wall means in said upper body member bore defining a valve seat, said lower end portion of said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding said lower end portion of said upper body member and located between said force applying surfaces on said upper and lower body members respectively, a plurality of generally axially extending bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand into contact with said inner surface of said fitting ring below said shoulder thereon, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, an axially extending valve guide secured to said lower end portion of said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member, and a vent opening in said upper body member for providing communication from said bore of said lower body member to atmosphere.
Claim 3
Dependent Claim
351 words
A drain check valve in a drain combination including a sewer drain pipe having an upper open bell portion connected to a lower smaller diameter conduit portion by a shoulder defining a surface, a fitting riNg having one end portion resting on said surface and having another end portion terminating approximately level with said upper open bell portion, said fitting ring having an outer surface defining an annular chamber with said upper open bell portion, said fitting ring having an inner surface, cement in said annular chamber to hold said fitting ring fixedly in position, said check valve comprising a lower body member having a bore extending therethrough, said lower body member having a stop surface and a force applying surface thereon, an upper body member having a bore extending therethrough generally coaxial with said bore in said lower body member, wall means in said upper body member bore defining a valve seat, said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding one of said upper and lower body members and located between said force applying surfaces on said upper and lower body members respectively, a plurality of bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand into contact with said inner surface of said fitting ring, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, a valve guide secured to said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member.
Claim 4
Dependent Claim
351 words
A drain check valve in a drain combination including a sewer drain pipe having an upper open bell portion connected to a lower smaller diameter conduit portion by a shoulder defining a surface, a fitting riNg having one end portion resting on said surface and having another end portion terminating approximately level with said upper open bell portion, said fitting ring having an outer surface defining an annular chamber with said upper open bell portion, said fitting ring having an inner surface, cement in said annular chamber to hold said fitting ring fixedly in position, said check valve comprising a lower body member having a bore extending therethrough, said lower body member having a stop surface and a force applying surface thereon, an upper body member having a bore extending therethrough generally coaxial with said bore in said lower body member, wall means in said upper body member bore defining a valve seat, said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding one of said upper and lower body members and located between said force applying surfaces on said upper and lower body members respectively, a plurality of bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand into contact with said inner surface of said fitting ring, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, a valve guide secured to said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member.
Claim 5
Dependent Claim
341 words
A drain check valve comprising a lower body member having upper and lower end portions and having a bore extending therethrough, said upper end portion of said lower body member having a stop surface and a force applying surface thereon, an upper body member having upper and lower end portions and having a bore extending therethrough generally coaxial with said bore in said lower body member, one of said upper end portion of said lower body member and said lower end portion of said upper body member comprising an unthreaded counterbore and the other comprising an unthreaded extension fitting within said unthreaded counterbore, wall means in said upper body member bore defining a valve seat, said lower end portion of said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding said lower end portion of said upper body member and located between said force applying surfaces on said upper and lower body members respectively, a plurality of generally axially extending bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand, said two stop surfaces, limiting axial movement of said body members and radial expansion of said ring, an axially extending valve guide secured to said lower end portion of said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member, and a vent opening in said upper body member for providing communication from said bore of said lower body member to atmosphere.
Claim 6
Dependent Claim
341 words
A drain check valve comprising a lower body member having upper and lower end portions and having a bore extending therethrough, said upper end portion of said lower body member having a stop surface and a force applying surface thereon, an upper body member having upper and lower end portions and having a bore extending therethrough generally coaxial with said bore in said lower body member, one of said upper end portion of said lower body member and said lower end portion of said upper body member comprising an unthreaded counterbore and the other comprising an unthreaded extension fitting within said unthreaded counterbore, wall means in said upper body member bore defining a valve seat, said lower end portion of said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding said lower end portion of said upper body member and located between said force applying surfaces on said upper and lower body members respectively, a plurality of generally axially extending bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand, said two stop surfaces, limiting axial movement of said body members and radial expansion of said ring, an axially extending valve guide secured to said lower end portion of said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member, and a vent opening in said upper body member for providing communication from said bore of said lower body member to atmosphere.
Claim 7
Dependent Claim
274 words
A drain check valve comprising a lower body member having a bore extending therethrough, said lower body member having a stop surface and a force applying surface thereon, an upper body member having a bore extending therethrough generally coaxial with said bore in said lower body member, one of said lower body member and said upper body member comprising an unthreaded counterbore and the other comprising an unthreaded extension fitting within said unthreaded counterbore, wall means in said upper body member bore defining a valve seat, said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding one of said upper and lower body members and located between said force applying surfaces on said upper and lower body members respectively, a plurality of bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, a valve guide secured to said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member.
Claim 8
Dependent Claim
274 words
A drain check valve comprising a lower body member having a bore extending therethrough, said lower body member having a stop surface and a force applying surface thereon, an upper body member having a bore extending therethrough generally coaxial with said bore in said lower body member, one of said lower body member and said upper body member comprising an unthreaded counterbore and the other comprising an unthreaded extension fitting within said unthreaded counterbore, wall means in said upper body member bore defining a valve seat, said upper body member having a stop surface and a force applying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding one of said upper and lower body members and located between said force applying surfaces on said upper and lower body members respectively, a plurality of bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, a valve guide secured to said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member.
Claim 9
Dependent Claim
169 words
A drain check valve comprising a body having a bore therein, a valve seat in said bore, a valve mounting member in said bore, said valve mounting member having at least three spaced and axially extending bearing surfaces, a valve member adapted to close against said valve seat, said valve member comprising a cylindrically shaped hollow member having an open lower end to fit over said valve mounting member whereby said valve member is guided between open and closed positions on said bearing surfaces on said valve mounting member, said cylindrically shaped hollow member having a closed airtight upper end which has an outer convex surface adapted to engage said valve seat in said closed position of said valve member, mounting means for securing the body against a surrounding structure including a deformable gasket, means for compressing said gasket longitudinally with respect to said bore to cause deformation thereof radially with respect to said bore, and stop means to limit the compression of said gasket to a predetermined value.
Claim 10
Dependent Claim
169 words
A drain check valve comprising a body having a bore therein, a valve seat in said bore, a valve mounting member in said bore, said valve mounting member having at least three spaced and axially extending bearing surfaces, a valve member adapted to close against said valve seat, said valve member comprising a cylindrically shaped hollow member having an open lower end to fit over said valve mounting member whereby said valve member is guided between open and closed positions on said bearing surfaces on said valve mounting member, said cylindrically shaped hollow member having a closed airtight upper end which has an outer convex surface adapted to engage said valve seat in said closed position of said valve member, mounting means for securing the body against a surrounding structure including a deformable gasket, means for compressing said gasket longitudinally with respect to said bore to cause deformation thereof radially with respect to said bore, and stop means to limit the compression of said gasket to a predetermined value.
Claim 11
Dependent Claim
49 words
A drain check valve as claimed in claim 5, wherein said means for compressing said gasket comprises said body having two separate parts with opposed facing surfaces on either side of said deformable gasket, and means acting between said two separate parts to move the same toward each other.
Claim 12
Dependent Claim
351 words
A drain check valve in a drain combination including a sewer drain pipe having an upper open bell portion connected to a lower smaller diameter conduit portion by a shoulder defining a surface, a fitting ring having one end portion resting on said surface and having another end portion terminating approximately level with said upper open bell portion, said fitting ring having an outer surface defining an annular chamber with said upper open bell portion, said fitting ring having an inner surface, means in said annular chamber to hold said fitting ring fixedly in position, said check valve comprising a lower body member having a bore extending therethrough, said lower body member having a stop surface and a force applying surface thereon, an upper body member having a bore extending therethrough generally coaxial with said bore in said lower body member, wall means in said upper body member bore defining a valve seat, said upper body member having a stop surface and a force appLying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding one of said upper and lower body members and located between said force applying surfaces on said upper and lower body members respectively, a plurality of bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand into contact with said inner surface of said fitting ring, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, a valve guide secured to said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member.
Claim 13
Dependent Claim
351 words
A drain check valve in a drain combination including a sewer drain pipe having an upper open bell portion connected to a lower smaller diameter conduit portion by a shoulder defining a surface, a fitting ring having one end portion resting on said surface and having another end portion terminating approximately level with said upper open bell portion, said fitting ring having an outer surface defining an annular chamber with said upper open bell portion, said fitting ring having an inner surface, means in said annular chamber to hold said fitting ring fixedly in position, said check valve comprising a lower body member having a bore extending therethrough, said lower body member having a stop surface and a force applying surface thereon, an upper body member having a bore extending therethrough generally coaxial with said bore in said lower body member, wall means in said upper body member bore defining a valve seat, said upper body member having a stop surface and a force appLying surface thereon axially in line respectively with said stop surface and said force applying surface on said lower body member, a deformable ring surrounding one of said upper and lower body members and located between said force applying surfaces on said upper and lower body members respectively, a plurality of bolts extending between said upper and lower body members and in tightened condition axially pulling said body members together and axially compressing said ring between said two force applying surfaces causing it to radially expand into contact with said inner surface of said fitting ring, said two stop surfaces limiting axial movement of said body members and radial expansion of said ring, a valve guide secured to said lower body member, a valve member movable on said valve guide between an upper closed position in engagement with said valve seat and a lower open position, said valve member comprising a generally cylindrically shaped member having an open lower end and a closed upper end, said closed upper end including a hemispherically shaped wall which engages said valve seat in said closed position of said valve member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |