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Magnetic seal assembly
PATENTS Metal-to-metal non elastomeric seal stack Applicant: Baker Hughes Inc. USA A seal assembly is described that is for use in down-hole sliding sleeve valves used for the control of functions in an oil well. This design is intended to operate at higher temperatures and pressures and overcome problems of erosion of the seal stack. The assembly comprises a stack of V-shaped rings manufactured from a thermoplastic. In addition it includes a pair of annular metallic seal members that have a C-ring cross-section. On opposite axial sides of each metallic C- seal are a C-seal support ring and an
end adapter that are shaped and sized to assist the metallic C-seals to be axially compressed and uncompressed to resiliently seal against both the inner sleeve member and the outer housing. Patent number: WO/2007/050618 Inventor: A. Gomez. Publication date: 3 May 2007 Editor’s comment: You will note that this looks as if it will create a potentially effective plastic seal arrangement. But, I perceive from the title that it can be marketed to those in the oil industry who insist on having metal to metal seals as a being just that, with non-elastomer back-ups. We must not mention plastic, it sounds very cheap and unworthy.
Arrangement for simplified seal installation Applicant: Renault sas, France This patent describes an arrangement for installing a seal on a body panel of a motor vehicle. The seal has a removable guide which is used for location while the seal is adhered in position. The guide can then be removed. Patent number: WO/2007/051937 Inventor: P. Cordier. Publication date: 10 May 2007
A down hole sliding sleeve valve seal that has plastic V-rings supported by a metal C-ring seal.
Rigid joint sealing system Applicant: GKN Driveline North America, Inc. USA This invention is a sealing system for constant velocity automotive shaft joints and describes the use of seal in a rigid casing as an alternative to the use of a flexible boot. This offers the advantage of avoiding the use of the boot which is prone to damage. Other benefits include higher allowable internal joint pressure, improved environmental resistance, use in high speed high angle joint seal applications, improved seal life due to internal sealing
structure and may eliminate crimped connections. A seal is fitted in a groove on the outer surface of the flexible joint member. The rigid section of the joint has an outer casing, with a spherical shape that matches the outer surface of the flexible section to provide a counterface for the seal. A variety of seal sections are described including quad ring type designs, single and double acting lip seals some with garter spring retention. Patent number: WO/2007/051100 Inventors: H. Wormsbaecher and E.J. Lamothe. Publication date: 3 May 2007
A constant velocity joint that has a rigid outer cover and a seal to replace the usual boot.
September 2007
The guide (30) locates the seal while it is fixed in position (top), it can subsequently be removed (bottom).
Magnetic seal assembly Applicant: Omega-Kemix Private Ltd. India Although the title is for a magnetic seal, this patent appears to describe a magnetic coupling. It is specifically designed to overcome the limitations of conventional magnetic drives, which have limited torque capacity, making it suitable for commercial scale chemical mixing applications. This also requires a suitable bearing arrangement to accommodate the overhung shaft of a mixer. The design features an axially extended magnetic drive assembly. It also appears to include a bearing and anti dust bush on the product side of the coupling which does not seem particularly compatible with chemical mixer operation. Patent number: WO/2007/052287 Inventor: R. Deshpande. Publication date: 10 May 2007
Sealing Technology
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end adapter that are shaped and sized to assist the metallic C-seals to be axially compressed and uncompressed to resiliently seal against both the inner sleeve member and the outer housing. Patent number: WO/2007/050618 Inventor: A. Gomez. Publication date: 3 May 2007 Editor’s comment: You will note that this looks as if it will create a potentially effective plastic seal arrangement. But, I perceive from the title that it can be marketed to those in the oil industry who insist on having metal to metal seals as a being just that, with non-elastomer back-ups. We must not mention plastic, it sounds very cheap and unworthy.
Arrangement for simplified seal installation Applicant: Renault sas, France This patent describes an arrangement for installing a seal on a body panel of a motor vehicle. The seal has a removable guide which is used for location while the seal is adhered in position. The guide can then be removed. Patent number: WO/2007/051937 Inventor: P. Cordier. Publication date: 10 May 2007
A down hole sliding sleeve valve seal that has plastic V-rings supported by a metal C-ring seal.
Rigid joint sealing system Applicant: GKN Driveline North America, Inc. USA This invention is a sealing system for constant velocity automotive shaft joints and describes the use of seal in a rigid casing as an alternative to the use of a flexible boot. This offers the advantage of avoiding the use of the boot which is prone to damage. Other benefits include higher allowable internal joint pressure, improved environmental resistance, use in high speed high angle joint seal applications, improved seal life due to internal sealing
structure and may eliminate crimped connections. A seal is fitted in a groove on the outer surface of the flexible joint member. The rigid section of the joint has an outer casing, with a spherical shape that matches the outer surface of the flexible section to provide a counterface for the seal. A variety of seal sections are described including quad ring type designs, single and double acting lip seals some with garter spring retention. Patent number: WO/2007/051100 Inventors: H. Wormsbaecher and E.J. Lamothe. Publication date: 3 May 2007
A constant velocity joint that has a rigid outer cover and a seal to replace the usual boot.
September 2007
The guide (30) locates the seal while it is fixed in position (top), it can subsequently be removed (bottom).
Magnetic seal assembly Applicant: Omega-Kemix Private Ltd. India Although the title is for a magnetic seal, this patent appears to describe a magnetic coupling. It is specifically designed to overcome the limitations of conventional magnetic drives, which have limited torque capacity, making it suitable for commercial scale chemical mixing applications. This also requires a suitable bearing arrangement to accommodate the overhung shaft of a mixer. The design features an axially extended magnetic drive assembly. It also appears to include a bearing and anti dust bush on the product side of the coupling which does not seem particularly compatible with chemical mixer operation. Patent number: WO/2007/052287 Inventor: R. Deshpande. Publication date: 10 May 2007
Sealing Technology
15