Patents Assigned to John Crane Inc.
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Patent number: 11821523Abstract: 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.Type: GrantFiled: September 4, 2020Date of Patent: November 21, 2023Assignee: JOHN CRANE INC.Inventors: James R. Wasser, Prashanthi Tirunagari
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Patent number: 11815185Abstract: 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.Type: GrantFiled: August 30, 2022Date of Patent: November 14, 2023Assignee: JOHN CRANE INC.Inventors: Prashanthi Tirunagari, James R. Wasser
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Patent number: 11808359Abstract: A mechanical seal assembly adapted for arrangement around a rotating shaft of a rotating device and has first and a second seal rings. The assembly also includes an annular carrier having a base and a removable end portion configured to be affixed to a housing of the rotating device. The assembly also includes an annular flexible sealing membrane. The membrane includes an outer portion arrangeable between the first seal ring and a biasing mechanism and that is axially shiftable relative to the rotating shaft. The membrane also includes an inner portion surrounded by the outer portion and positioned between the base and the removable end portion of the annular carrier and the base and a removable end portions hold the inner portion in fixed relative to the annular carrier as the outer portion shifts relative to the rotating shaft.Type: GrantFiled: June 28, 2021Date of Patent: November 7, 2023Assignee: JOHN CRANE INC.Inventor: Darin Merrill Rasmussen
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Patent number: 11761542Abstract: A double seal includes two sliding seals. The seals can be non-pusher secondary seals (NPSS). In one embodiment, by employing an NPSS as the chamber side seal can handle large pressure reversals where the inner diameter pressure (pressure in the chamber) spikes and exceeds the outer diameter pressure that is provided between the two seals forming the double seal.Type: GrantFiled: April 12, 2022Date of Patent: September 19, 2023Assignee: JOHN CRANE INC.Inventor: Darin Merrill Rasmussen
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Patent number: 11473680Abstract: 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.Type: GrantFiled: April 7, 2020Date of Patent: October 18, 2022Assignee: JOHN CRANE INC.Inventors: Darin Merrill Rasmussen, Tom Steigerwald, Syed Niamathullah, Dan Kozlowski, James R. Wasser, Michael G. Kalodimos
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Patent number: 10662523Abstract: A novel composite diamond film comprising of a relatively thick layer of UNCD (Ultrananocrystalline Diamond) with a Young's modulus of less than 900 GPa and a relatively thin MCD (microcrystalline diamond) outermost layer with a Young's modulus of greater than 900 GPa, has been shown to exhibit superior delamination resistance under extreme shear stress. It is hypothesized that this improvement is due to a combination of stress relief by the composite film with a slightly “softer” UNCD layer, a disruption of the fracture mechanism through the composite layer(s), and the near ideal chemical and thermal expansion coefficient match between the two diamond layers. The combination of a thick but “softer” underlying UNCD layer with a thin but harder overlying MCD layer provides an excellent compromise between the low deposition cost and smoothness of UNCD with the extreme hardness and unparalleled chemical, electrochemical and immunological inertness of even a thin layer of MCD.Type: GrantFiled: May 27, 2016Date of Patent: May 26, 2020Assignee: JOHN CRANE INC.Inventors: Hongjun Zeng, John Arthur Carlisle, Ian Wakefield Wylie
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Patent number: 10662550Abstract: A method for forming diamond nanostructures with large specific area can include forming porous diamond nanostructures by means of selectively etching sp2-bonded carbon and partially removing sp3-bonded carbon in nanocrystalline diamond (NCD) and ultrananocrystalline diamond (UNCD® diamond). The diamond nanostructures achieved from the disclosed method can include a long shaft surrounded by a school of barbs. The nanostructure can provide a significantly larger surface area than diamond without such a nanostructure and its fabrication provides relative ease of manufacture compared to traditional techniques.Type: GrantFiled: November 2, 2017Date of Patent: May 26, 2020Assignee: JOHN CRANE INC.Inventors: Hongjun Zeng, Nicolaie A. Moldovan
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Patent number: 10634250Abstract: 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.Type: GrantFiled: July 12, 2017Date of Patent: April 28, 2020Assignee: JOHN CRANE INC.Inventors: Darin Rasmussen, Tom Steigerwald, Syed Niamathullah, Dan Kozlowski, James R. Wasser, Michael G. Kalodimos
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Patent number: 10184565Abstract: A mechanical end face seal having an induction heated seal ring is provided to be used for sealing high-viscosity thermo-sensitive fluids in pressure containing rotating equipment. The different embodiments particularly provide a sealing member fixed to the housing, the sealing element is constructed using ferromagnetic materials. An induction coil attached to a power source is installed outside the housing, said induction coil is supplied with an alternating current producing a time dependent magnetic field that induces eddy currents in the aforementioned sealing member generating heat thus affecting the operating temperatures of the sealing member and hence the interface temperature to achieve greater sealing efficiency, longer seal life and faster equipment startup.Type: GrantFiled: January 23, 2017Date of Patent: January 22, 2019Assignee: John Crane Inc.Inventor: Antonio Raul Leal
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Publication number: 20180017161Abstract: 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.Type: ApplicationFiled: July 12, 2017Publication date: January 18, 2018Applicant: John Crane Inc.Inventors: Darin Rasmussen, Tom Steigerwald, Syed Niamathullah, Dan Kozlowski
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Patent number: 9790952Abstract: A seal monitoring and control system for a gas lubricated non-contacting seal includes various sensors providing signals to a programmable logic control system. The control system is disposed to determine a presence of an anomalous operating condition of the seal, for example, based on phase, relative position of rotor to stator or other signals in combination provided by the various sensors to provide an output signal, which in one embodiment performs at least one mitigating process to correct the anomalous operating condition by adjusting at least one operating parameter of the seal.Type: GrantFiled: February 12, 2014Date of Patent: October 17, 2017Assignee: John Crane Inc.Inventors: Elhanafi Shamseldin, Joe Delrahim, Paul A. Hosking, Joseph L. Savio, Vladimir Bakalchuk
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Patent number: 9651157Abstract: A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly.Type: GrantFiled: February 13, 2014Date of Patent: May 16, 2017Assignee: John Crane Inc.Inventor: David M. Dudek
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Patent number: 8651494Abstract: A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly.Type: GrantFiled: March 14, 2011Date of Patent: February 18, 2014Assignee: John Crane Inc.Inventor: David M. Dudek
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Patent number: 8651801Abstract: A seal monitoring and control system for a gas lubricated non-contacting seal includes various sensors providing signals to a programmable logic control system. The control system is disposed to determine a presence of an anomalous operating condition of the seal, for example, based on phase, relative position of rotor to stator or other signals in combination provided by the various sensors to provide an output signal, which in one embodiment performs at least one mitigating process to correct the anomalous operating condition by adjusting at least one operating parameter of the seal.Type: GrantFiled: May 20, 2009Date of Patent: February 18, 2014Assignee: John Crane Inc.Inventors: Elhanafi A. Shamseldin, Joe Delrahim, Paul A. Hosking, Joseph L. Savio, Vladimir Bakalchuk
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Publication number: 20130031960Abstract: A monitoring and control system for a seal gas supply system for a non-contacting gas seal. The supply includes several gas conditioning elements or units. The monitoring and control system includes an evanescent wave sensor to sense the presence of liquid in the seal gas. Multiple sensors to sense the temperature and pressure of the treated seal gas are disposed at the outlet of the conditioning elements. A programmable logic device is provided with information regarding the phase of the gas at various pressures and temperatures and compares the sensed data to the baseline data. Recognition of liquid concentrate results in an output signal.Type: ApplicationFiled: August 1, 2012Publication date: February 7, 2013Applicant: John Crane Inc.Inventors: Joe Delrahim, Paul A. Hosking
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Publication number: 20110221136Abstract: A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly.Type: ApplicationFiled: March 14, 2011Publication date: September 15, 2011Applicant: John Crane Inc.Inventor: David M. Dudek
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Patent number: 7959156Abstract: A seal assembly for use with a rotating shaft comprises a seal ring, a seal ring shell and bellows. The seal ring defines an axially extending annular surface and a radially extending seal face. The seal ring shell includes a foot portion connected to a radially extending shin portion located radially outward of the foot portion. The foot portion defining an axially extending engagement surface in interference-fit engagement with the annular surface of the seal ring. The engagement surface is positioned so as to have a near-zero moment about the center of gravity of the seal ring due to the engagement. The bellows defines an effective diameter at zero pressure applied on the seal ring. The interface of the foot portion with the seal ring defines an interference diameter.Type: GrantFiled: March 7, 2007Date of Patent: June 14, 2011Assignee: John Crane Inc.Inventors: Prithwish Basu, David P. Casucci
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Patent number: 7857319Abstract: A mechanical end face seal with a pair of annular relatively rotating seal face defining seal rings. An annular compression contact ring disposed in surrounding relation to one of the seal rings includes a plurality of pads at asymmetrical locations in interference contact with the outer cylindrical surface of the ring.Type: GrantFiled: June 6, 2007Date of Patent: December 28, 2010Assignee: John Crane Inc.Inventors: Thomas Steigerwald, Michael Kalodimos, Douglas Volden
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Publication number: 20090290971Abstract: A seal monitoring and control system for a gas lubricated non-contacting seal includes various sensors providing signals to a programmable logic control system. The control system is disposed to determine a presence of an anomalous operating condition of the seal, for example, based on phase, relative position of rotor to stator or other signals in combination provided by the various sensors to provide an output signal, which in one embodiment performs at least one mitigating process to correct the anomalous operating condition by adjusting at least one operating parameter of the seal.Type: ApplicationFiled: May 20, 2009Publication date: November 26, 2009Applicant: John Crane Inc.Inventors: Elhanafi A. Shamseldin, Joe Delrahim, Paul A. Hosking, Joseph L. Savio, Vladimir Bakalchuk
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Patent number: 7611151Abstract: A seal assembly for sealing between a housing component and a rotating shaft. The seal assembly comprises a pair of relatively rotating rings defining a seal interface. One ring is stationary relative to the housing component. A flexible compressive seal element is compressed axially between the housing component and an axially movable biased compression ring to urge it into radial compressive sealing contact with a cylindrical surface on the stationary ring.Type: GrantFiled: April 6, 2007Date of Patent: November 3, 2009Assignee: John Crane Inc.Inventors: David P. Casucci, Daniel Fisher