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Mechanical seal with banded ring
PATENTS Spark plug with tapered fired-in suppressor seal Applicant: Federal-Mogul Corp. USA A method for providing an extended suppressor seal between the conductor and insulator in an internal combustion engine spark plug is described. Patent number: WO/2007/147030 Inventors: J.W. Hoffman and J.D. Lykowski Publication date: 21 December 2007
Bearing seal This duo-cone seal has an elastic layer on the metal cone surfaces to help prevent wear of the O-rings by debris.
Floating seal Applicant: Komatsu Ltd. Japan This patent is concerned with the duo-cone type of mechanical face seal that is used in earthmoving equipment applications. Elastic layers (28, 29) are used on the conical surfaces of the seal rings and housing respectively. The purpose is to inhibit entrainment of debris. Patent number: WO/2007/145135 Inventor: Y. Kometani Publication date: 21 December 2007
Applicant: Freudenberg-NOK GP, USA A bearing seal is described that is intended to provide low friction sealing and good accommodation of tolerance stack-up whilst also permitting the venting from the bearing housing. It has a pair of radial sealing lips and an axial excluder lip. The lips are demonstrated as having high flexibility. Patent number: WO/2007/146078 Inventors: A. Berdichevsky, K.R. Colby and L.A. Cieslinski Publication date: 21 December 2007
Tool for installing a seal in a groove Applicant: Rieter Perfojet, France A tool for installing a seal in a groove is described. It is particularly intended for water jet cutting equipment. Patent number: WO/2007/144479 Inventors: L. Schmit and C. Decolin Publication date: 21 December 2007
assembly. It is designed to overcome the problem of squeal that occurs once the seal is run-in. A metal ring is pressed onto the outer diameter of the carbon ring near the sealing face. This ring has intermittent sections on the ring inside diameter contacting the carbon with an interference fit at a number of designated asymmetrically located positions. This imparts stresses on the carbon which, in turn, result in slight deformations on the seal face. The stress ring exerts circumferential pressure on the primary seal face which is unequal, and thus is ever changing depending upon the rotational speed of the shaft and axial load exerted on the seal. Thermal changes at the seal faces also affect the changes in stress. The changing state of stress on the primary ring serves to interrupt harmonic vibration at the seal faces and thus results in quiet dry running operation. Patent number: WO/2007/146749 Inventors: T. Steigerwald, M. Kalodimos and D. Volden Publication date: 21 December 2007
Seal and seal arrangement Applicant: Trelleborg Sealing Solutions Germany GmbH, Germany A seal of the S-section type that may be used for reciprocating or rotary sealing applications, particularly in pneumatic applications is described. This design is intended to prevent blow-by that can occur due to radial compression of the S section of the seal during pressure reversals when it may seal against the groove wall. To maintain the seal away from the groove walls and permit pressure actuation of the S section a series of buttons are moulded onto the radial faces of the seal. Patent number: WO/2007/147391 Inventor: M. Keck Publication date: 27 December 2007
Tube seal components Applicant: Freudenberg-NOK GP, USA This patent describes a tube seal device that is used to provide a sealed fluid passage between two components. It is designed to overcome problems of assembly, misalignment and labour costs associated with tube connectors that have O-rings and the poor reliability of elastomer coated tubes that rely on rubber to metal bonding. The design described has a recessed annular groove at each end into which an elastomer seal is moulded. This retains the benefits of the over moulded designs but is not reliant on the bonding for a long term seal. Patent number: WO/2007/145779 Inventor: T.T. Smith Publication date: 21 December 2007 14
Sealing Technology
The bearing seal described in WO/2007/146078 showing the free and assembled geometry.
Mechanical seal with banded ring Applicant: John Crane Inc. USA This patent describes a mechanical seal arrangement that is specifically intended for top entry mixers that have a dry running seal
A pneumatic piston seal that has a series of moulded features on the radial surfaces to ensure that the seal is energised by the pressure during reversals.
April 2008
Bearing seal This duo-cone seal has an elastic layer on the metal cone surfaces to help prevent wear of the O-rings by debris.
Floating seal Applicant: Komatsu Ltd. Japan This patent is concerned with the duo-cone type of mechanical face seal that is used in earthmoving equipment applications. Elastic layers (28, 29) are used on the conical surfaces of the seal rings and housing respectively. The purpose is to inhibit entrainment of debris. Patent number: WO/2007/145135 Inventor: Y. Kometani Publication date: 21 December 2007
Applicant: Freudenberg-NOK GP, USA A bearing seal is described that is intended to provide low friction sealing and good accommodation of tolerance stack-up whilst also permitting the venting from the bearing housing. It has a pair of radial sealing lips and an axial excluder lip. The lips are demonstrated as having high flexibility. Patent number: WO/2007/146078 Inventors: A. Berdichevsky, K.R. Colby and L.A. Cieslinski Publication date: 21 December 2007
Tool for installing a seal in a groove Applicant: Rieter Perfojet, France A tool for installing a seal in a groove is described. It is particularly intended for water jet cutting equipment. Patent number: WO/2007/144479 Inventors: L. Schmit and C. Decolin Publication date: 21 December 2007
assembly. It is designed to overcome the problem of squeal that occurs once the seal is run-in. A metal ring is pressed onto the outer diameter of the carbon ring near the sealing face. This ring has intermittent sections on the ring inside diameter contacting the carbon with an interference fit at a number of designated asymmetrically located positions. This imparts stresses on the carbon which, in turn, result in slight deformations on the seal face. The stress ring exerts circumferential pressure on the primary seal face which is unequal, and thus is ever changing depending upon the rotational speed of the shaft and axial load exerted on the seal. Thermal changes at the seal faces also affect the changes in stress. The changing state of stress on the primary ring serves to interrupt harmonic vibration at the seal faces and thus results in quiet dry running operation. Patent number: WO/2007/146749 Inventors: T. Steigerwald, M. Kalodimos and D. Volden Publication date: 21 December 2007
Seal and seal arrangement Applicant: Trelleborg Sealing Solutions Germany GmbH, Germany A seal of the S-section type that may be used for reciprocating or rotary sealing applications, particularly in pneumatic applications is described. This design is intended to prevent blow-by that can occur due to radial compression of the S section of the seal during pressure reversals when it may seal against the groove wall. To maintain the seal away from the groove walls and permit pressure actuation of the S section a series of buttons are moulded onto the radial faces of the seal. Patent number: WO/2007/147391 Inventor: M. Keck Publication date: 27 December 2007
Tube seal components Applicant: Freudenberg-NOK GP, USA This patent describes a tube seal device that is used to provide a sealed fluid passage between two components. It is designed to overcome problems of assembly, misalignment and labour costs associated with tube connectors that have O-rings and the poor reliability of elastomer coated tubes that rely on rubber to metal bonding. The design described has a recessed annular groove at each end into which an elastomer seal is moulded. This retains the benefits of the over moulded designs but is not reliant on the bonding for a long term seal. Patent number: WO/2007/145779 Inventor: T.T. Smith Publication date: 21 December 2007 14
Sealing Technology
The bearing seal described in WO/2007/146078 showing the free and assembled geometry.
Mechanical seal with banded ring Applicant: John Crane Inc. USA This patent describes a mechanical seal arrangement that is specifically intended for top entry mixers that have a dry running seal
A pneumatic piston seal that has a series of moulded features on the radial surfaces to ensure that the seal is energised by the pressure during reversals.
April 2008