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Element for a slip-ring sealing arrangement
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06/02/2003
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PATENTS
Long history John Crane developed the first non-contacting, dry-running gas seal 30 years ago, according to Hosanna. He says that since then the Type 28 seals have been used in thousands of
Patents Element for a slip-ring sealing arrangement Applicant: Burgmann Dichtungswerke GmbH & Co KG, Germany The subject of this patent is an element for a slip-ring seal arrangement. It comprises a bellows section with terminal assembly sections, one of which is embodied for fixed assembly to a component and the other for housing a slip ring. At least the surfaces of the seal element (which face the medium to be sealed) are made from a synthetic material that is essentially resistant to the medium. At least one threaded drilling is provided on the assembly section for fixed assembly, into which is screwed a threaded pin (made from a ceramic material) for tensioning the assembly section against the component. Patent number: WO 02/093047 Inventors: M. Riedl, W. Ries and R. Svejkovsky Publication date: 21 November 2002
Mechanical seal Applicant: AES Engineering Ltd, UK This patent describes a mechanical seal that is designed to be positioned between a rotatable shaft and a housing. It includes a seal face that is provided with a textured portion and a non-textured portion. The non-textured portion acts as a sealing dam. Patent number: WO 02/093046 Inventor: A. Roddis Publication date: 21 November 2002
Annular seal for plug-in connectors Applicant: MSA Auer GmbH, Germany In an annular seal for plug-in connectors, a sealing ring may be introduced in a sliding manner into an annular groove on a first component. This ring is composed of a sealing lip that runs around the middle of the circumference of the sealing surface, facing a second component. The opposing bearing surface comprises a ‘dished’ bearing surface recess to form a lubricant chamber, which runs into bearing surface sealing lips at their edges. A peripheral enclosing sealing lip is formed on both sides of the sealing surface extension running from a sealing surface recess. This annular seal is characterized by a high sealing efficiency and low frictional forces, claims its developers. Patent number: WO 02/093045 Inventors: C. Leuschner, P. Kling and P. Kadow Publication date: 21 November 2002
Sealing Technology February 2003
applications around the world. Many of the seals have been performing for 10 years or more.
USA. Tel: +1 847 967 2400, Fax: +1 847 967 3915. Web: www.johncrane.com.
For more information, contact: John Crane Inc, 6400 West Oakton Street, Morton Grove, IL 60053,
Or contact: John Crane, Nash Road, Trafford Park, Manchester M17 1SS, UK. Tel: +44 161 886 5996, Fax: +44 161 886 5990.
Multi-layer unitary gasket
Metallic labyrinth seal
Assignee: W.L. Gore & Associates GmbH, Germany; Gore Enterprise Holdings Inc, USA; and Japan Gore-Tex Inc, Japan A multi-layer, unitary gasket is detailed. Included is at least one inner layer of expanded polytetrafluoroethylene disposed between a first substantially air-impermeable outer layer and a second substantially air-impermeable outer layer, and a substantially air-impermeable region bridges the first and second substantially airimpermeable layers. The gasket forms a seal that is impermeable air when compressed at low stress. Patent number: US 6485809 Inventors: B.R. Minor, K.E. Dove, R.G. Egres Jr., A. Riedl, H. Hisano and D.J. Mills Publication date: 26 November 2002
Assignee: JM Clipper Corp, USA A two-piece interlocked labyrinth seal device is the subject of this patent. In use, it provides a seal between a housing and a shaft formed from two ring members, specifically a rotor and stator that are connected to each other by an element which is plastically deformable. The rotor further includes one, or a series of protrusions and recesses, for providing a tortuous passage for fluid travel within the sealing device. The system can be used on rotating shafts, rotating bores or as a baffle, and it possesses improved oil retention and water-exclusion properties. Patent number: US 6485022 Inventor: G. Fedorovich Publication date: 26 November 2002
Water pump seal
Assignee: International Business Machines Corp, USA A system using several wavelengths, preferably from the output of a single laser, is described for curing a dual-cure glue seal that affixes two substrates to form a liquid crystal display panel. Here the liquid crystal is already in place before the glue seal is cured so that a high temperature bake (to promote the sealant curing) is not permissible. The multiple wavelengths from the single source of radiation result both from frequency doubling and mixing of the fundamental laser to achieve frequency tripling. Ultraviolet is scanned along the entire peripheral region of the glue seal. Other wavelengths, typically infrared and possibly the first frequency doubled (first harmonic) of the infrared are separately collected and separately scanned only along those regions of the glue seal shadowed by circuit lines. These wavelengths are partially absorbed by the metal lines to cause thermal initiation of the dual component glue seal which is used in such a system. Patent number: US 6485599 Inventors: J.H. Glownia and R.J. von Gutfeld Publication date: 26 November 2002
Assignee: NSK Ltd, Japan This device comprises (in combination) a seal ring and what is referred to as a ‘singer’ to prevent foreign matter from progressing into a rolling bearing. The amount of compression of the second seal lip, which occurs when the tip edge of the second seal lip of the seal ring comes into contact with the outside surface of the ‘singer’, is at least 1/10 (and up to 7/10) the height of the second seal lip in a free state. In addition, the roughness of a portion of the outside surface of the ‘singer’, with which the tip edge of the second seal lip makes sliding contact, is from 0.2 µm to 2.0 µm in the arithmetic mean, or is from 0.8 µm to 8.0 µm in the maximum height. Patent number: US 6485256 Inventor: M. Iketani Publication date: 26 November 2002
Bearing seal Assignee: Roller Bearing Industries Inc, USA A seal for use with a tapered roller bearing includes a seal affixed to a first seal support, and comprises an inner sealing member in contact with a second seal support, an outer sealing member extending towards and in contact with the second seal support, and a central sealing member extending towards but not in contact with the second seal support. A rain shield, covering a gap between the first and second seal supports, also may be included. Patent number: US 6485185 Inventors: D.T. Conway, Jr., P.G. Steets, M.E. Paul; P.R. Price and T.K. Chu Publication date: 26 November 2002
Curing sealants using radiation
Liquid seal pump with helical screw Applicant: Jets AS, Norway This patent covers a liquid seal pump (of the helical screw type), including a pump housing with an inlet, outlet, and within the housing is provided a helical screw rotor that is driven by means of a motor. The outlet of the pump is provided with a sealing liquid tank for supplying liquid to the pump and thereby maintaining the liquid seal under idle running conditions of the pump.
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06/02/2003
13:55
Page 11
PATENTS
Long history John Crane developed the first non-contacting, dry-running gas seal 30 years ago, according to Hosanna. He says that since then the Type 28 seals have been used in thousands of
Patents Element for a slip-ring sealing arrangement Applicant: Burgmann Dichtungswerke GmbH & Co KG, Germany The subject of this patent is an element for a slip-ring seal arrangement. It comprises a bellows section with terminal assembly sections, one of which is embodied for fixed assembly to a component and the other for housing a slip ring. At least the surfaces of the seal element (which face the medium to be sealed) are made from a synthetic material that is essentially resistant to the medium. At least one threaded drilling is provided on the assembly section for fixed assembly, into which is screwed a threaded pin (made from a ceramic material) for tensioning the assembly section against the component. Patent number: WO 02/093047 Inventors: M. Riedl, W. Ries and R. Svejkovsky Publication date: 21 November 2002
Mechanical seal Applicant: AES Engineering Ltd, UK This patent describes a mechanical seal that is designed to be positioned between a rotatable shaft and a housing. It includes a seal face that is provided with a textured portion and a non-textured portion. The non-textured portion acts as a sealing dam. Patent number: WO 02/093046 Inventor: A. Roddis Publication date: 21 November 2002
Annular seal for plug-in connectors Applicant: MSA Auer GmbH, Germany In an annular seal for plug-in connectors, a sealing ring may be introduced in a sliding manner into an annular groove on a first component. This ring is composed of a sealing lip that runs around the middle of the circumference of the sealing surface, facing a second component. The opposing bearing surface comprises a ‘dished’ bearing surface recess to form a lubricant chamber, which runs into bearing surface sealing lips at their edges. A peripheral enclosing sealing lip is formed on both sides of the sealing surface extension running from a sealing surface recess. This annular seal is characterized by a high sealing efficiency and low frictional forces, claims its developers. Patent number: WO 02/093045 Inventors: C. Leuschner, P. Kling and P. Kadow Publication date: 21 November 2002
Sealing Technology February 2003
applications around the world. Many of the seals have been performing for 10 years or more.
USA. Tel: +1 847 967 2400, Fax: +1 847 967 3915. Web: www.johncrane.com.
For more information, contact: John Crane Inc, 6400 West Oakton Street, Morton Grove, IL 60053,
Or contact: John Crane, Nash Road, Trafford Park, Manchester M17 1SS, UK. Tel: +44 161 886 5996, Fax: +44 161 886 5990.
Multi-layer unitary gasket
Metallic labyrinth seal
Assignee: W.L. Gore & Associates GmbH, Germany; Gore Enterprise Holdings Inc, USA; and Japan Gore-Tex Inc, Japan A multi-layer, unitary gasket is detailed. Included is at least one inner layer of expanded polytetrafluoroethylene disposed between a first substantially air-impermeable outer layer and a second substantially air-impermeable outer layer, and a substantially air-impermeable region bridges the first and second substantially airimpermeable layers. The gasket forms a seal that is impermeable air when compressed at low stress. Patent number: US 6485809 Inventors: B.R. Minor, K.E. Dove, R.G. Egres Jr., A. Riedl, H. Hisano and D.J. Mills Publication date: 26 November 2002
Assignee: JM Clipper Corp, USA A two-piece interlocked labyrinth seal device is the subject of this patent. In use, it provides a seal between a housing and a shaft formed from two ring members, specifically a rotor and stator that are connected to each other by an element which is plastically deformable. The rotor further includes one, or a series of protrusions and recesses, for providing a tortuous passage for fluid travel within the sealing device. The system can be used on rotating shafts, rotating bores or as a baffle, and it possesses improved oil retention and water-exclusion properties. Patent number: US 6485022 Inventor: G. Fedorovich Publication date: 26 November 2002
Water pump seal
Assignee: International Business Machines Corp, USA A system using several wavelengths, preferably from the output of a single laser, is described for curing a dual-cure glue seal that affixes two substrates to form a liquid crystal display panel. Here the liquid crystal is already in place before the glue seal is cured so that a high temperature bake (to promote the sealant curing) is not permissible. The multiple wavelengths from the single source of radiation result both from frequency doubling and mixing of the fundamental laser to achieve frequency tripling. Ultraviolet is scanned along the entire peripheral region of the glue seal. Other wavelengths, typically infrared and possibly the first frequency doubled (first harmonic) of the infrared are separately collected and separately scanned only along those regions of the glue seal shadowed by circuit lines. These wavelengths are partially absorbed by the metal lines to cause thermal initiation of the dual component glue seal which is used in such a system. Patent number: US 6485599 Inventors: J.H. Glownia and R.J. von Gutfeld Publication date: 26 November 2002
Assignee: NSK Ltd, Japan This device comprises (in combination) a seal ring and what is referred to as a ‘singer’ to prevent foreign matter from progressing into a rolling bearing. The amount of compression of the second seal lip, which occurs when the tip edge of the second seal lip of the seal ring comes into contact with the outside surface of the ‘singer’, is at least 1/10 (and up to 7/10) the height of the second seal lip in a free state. In addition, the roughness of a portion of the outside surface of the ‘singer’, with which the tip edge of the second seal lip makes sliding contact, is from 0.2 µm to 2.0 µm in the arithmetic mean, or is from 0.8 µm to 8.0 µm in the maximum height. Patent number: US 6485256 Inventor: M. Iketani Publication date: 26 November 2002
Bearing seal Assignee: Roller Bearing Industries Inc, USA A seal for use with a tapered roller bearing includes a seal affixed to a first seal support, and comprises an inner sealing member in contact with a second seal support, an outer sealing member extending towards and in contact with the second seal support, and a central sealing member extending towards but not in contact with the second seal support. A rain shield, covering a gap between the first and second seal supports, also may be included. Patent number: US 6485185 Inventors: D.T. Conway, Jr., P.G. Steets, M.E. Paul; P.R. Price and T.K. Chu Publication date: 26 November 2002
Curing sealants using radiation
Liquid seal pump with helical screw Applicant: Jets AS, Norway This patent covers a liquid seal pump (of the helical screw type), including a pump housing with an inlet, outlet, and within the housing is provided a helical screw rotor that is driven by means of a motor. The outlet of the pump is provided with a sealing liquid tank for supplying liquid to the pump and thereby maintaining the liquid seal under idle running conditions of the pump.
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