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公开(公告)号：US20230074820A1
公开(公告)日：2023-03-09
申请号：US17898864
申请日：2022-08-30
Applicant: John Crane Inc.
Inventor： Prashanthi Tirunagari , James R. Wasser
Abstract: A mechanical seal assembly adapted for arrangement around a rotating shaft of a pump has first and second seals. Both include primary and mating rings, biasing mechanisms and annular flexible sealing membranes. The two seals can have different seal balances or different biasing forces (or both) to allow the second seal to run dry for extended periods.
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公开(公告)号：US11815185B2
公开(公告)日：2023-11-14
申请号：US17898864
申请日：2022-08-30
Applicant: John Crane Inc.
Inventor： Prashanthi Tirunagari , James R. Wasser
CPC classification number: F16J15/36 , F16J15/004 , F16J15/348 , F16J15/3452
Abstract: A mechanical seal assembly adapted for arrangement around a rotating shaft of a pump has first and second seals. Both include primary and mating rings, biasing mechanisms and annular flexible sealing membranes. The two seals can have different seal balances or different biasing forces (or both) to allow the second seal to run dry for extended periods.
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Patent Agency Ranking
公开(公告)号：US20230028905A1
公开(公告)日：2023-01-26
申请号：US17956043
申请日：2022-09-29
Applicant: John Crane Inc.
Inventor： Darin Merrill Rasmussen , Tom Steigerwald , Syed Niamathullah , Dan Kozlowski , James R. Wasser , Michael G. Kalodimos
Abstract: A non-collapsible flexible sealing membrane (or bellows) for incorporation in a mechanical seal assembly and use in rotary shaft equipment. The sealing membrane includes a substantially radially outward extending first flange portion, which can be urged into an axially shiftable ring by a biasing mechanism. The sealing membrane further includes a substantially axially outboard extending second coaxial portion, substantially radially inward of the balance diameter of the seal. The horizontal portion is advantageously held fixed to a stub sleeve by an annular band. The angle between the vertical portion and the horizontal portion of sealing membrane enables directional control of the forces acting on stub sleeve and primary ring.
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公开(公告)号：US11473680B2
公开(公告)日：2022-10-18
申请号：US16842004
申请日：2020-04-07
Applicant: John Crane Inc.
Inventor： Darin Merrill Rasmussen , Tom Steigerwald , Syed Niamathullah , Dan Kozlowski , James R. Wasser , Michael G. Kalodimos
Abstract: A non-collapsible flexible sealing membrane (or bellows) for incorporation in a mechanical seal assembly and use in rotary shaft equipment. The sealing membrane includes a substantially radially outward extending first flange portion, which can be urged into an axially shiftable ring by a biasing mechanism. The sealing membrane further includes a substantially axially outboard extending second coaxial portion, substantially radially inward of the balance diameter of the seal. The horizontal portion is advantageously held fixed to a stub sleeve by an annular band. The angle between the vertical portion and the horizontal portion of sealing membrane enables directional control of the forces acting on stub sleeve and primary ring.
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5.发明申请公开(公告)号：US20200232562A1
公开(公告)日：2020-07-23
申请号：US16842004
申请日：2020-04-07
Applicant: John Crane Inc.
Inventor： Darin Merrill Rasmussen , Tom Steigerwald , Syed Niamathullah , Dan Kozlowski , James R. Wasser , Michael G. Kalodimos
Abstract: A non-collapsible flexible sealing membrane (or bellows) for incorporation in a mechanical seal assembly and use in rotary shaft equipment. The sealing membrane includes a substantially radially outward extending first flange portion, which can be urged into an axially shiftable ring by a biasing mechanism. The sealing membrane further includes a substantially axially outboard extending second coaxial portion, substantially radially inward of the balance diameter of the seal. The horizontal portion is advantageously held fixed to a stub sleeve by an annular band. The angle between the vertical portion and the horizontal portion of sealing membrane enables directional control of the forces acting on stub sleeve and primary ring.
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公开(公告)号：US12055222B2
公开(公告)日：2024-08-06
申请号：US17956043
申请日：2022-09-29
Applicant: John Crane Inc.
Inventor： Darin Merrill Rasmussen , Tom Steigerwald , Syed Niamathullah , Dan Kozlowski , James R. Wasser , Michael G. Kalodimos
CPC classification number: F16J15/363 , F16J15/348 , F01D1/00 , F16J15/002 , F16J15/32 , F16J15/38
Abstract: A non-collapsible flexible sealing membrane (or bellows) for incorporation in a mechanical seal assembly and use in rotary shaft equipment. The sealing membrane includes a substantially radially outward extending first flange portion, which can be urged into an axially shiftable ring by a biasing mechanism. The sealing membrane further includes a substantially axially outboard extending second coaxial portion, substantially radially inward of the balance diameter of the seal. The horizontal portion is advantageously held fixed to a stub sleeve by an annular band. The angle between the vertical portion and the horizontal portion of sealing membrane enables directional control of the forces acting on stub sleeve and primary ring.
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公开(公告)号：US11821523B2
公开(公告)日：2023-11-21
申请号：US17419934
申请日：2020-09-04
Applicant: JOHN CRANE INC.
Inventor： James R. Wasser , Prashanthi Tirunagari
CPC classification number: F16J15/344 , F16J15/3484 , F16J15/36
Abstract: A seal that can be used alone or as a containment seal for another seal includes a primary ring (36) and a mating ring (30), the primary ring being axially shiftable relative to a rotating shaft (12) and the mating ring being axially fixable relative to the rotating shaft, a biasing mechanism (500) that urges the primary ring toward the mating ring, and an annular flexible sealing membrane (100). The membrane includes a flange portion (102) disposed at least partially between the biasing mechanism and the primary ring, a coaxial portion (104) that is axially fixable relative to the shaft, and a flexible connection portion (106) positioned within a radially inward extent of the flange portion and connecting the flange portion to the coaxial portion. At least one of the mating ring and the primary ring includes grooves formed on a face thereof that cause the formation of a gas film to develop between the primary ring and the mating ring that keeps the primary ring and the mating ring from contacting each other in operation.
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