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Self energizing seal element
PATENTS Well plunger and plunger seal for plunger lift pumping system Applicant: Rapad Rabbit LLC, USA A lift pump plunger for an oil or gas well is described where a feature of the plunger is that it has a thermoset seal on the plunger to improve the pumping. The seal may be a composite material and the design also facilitates easy seal replacement. Few actual seal details seem to be provided. Publication number: WO/2008/143986 Inventors: T.J. Akers et al. Publication date: 27 November 2008
Seal assembly for a pump Applicant: APC Co Pty Ltd, Australia The invention is intended for pumps in the slurry, waste, pulp, paper and chemical industries. The seal assembly comprises a seal housing that contains a mechanical seal as the external seal and what is described as a hydraulic seal, preferably a lip seal as an internal seal. A flush fluid is provided to the seal chamber and the hydraulic seal controls the flow between the pump and the chamber depending on the operating conditions. The system will also ensure that the mechanical seal does not run dry if there is no process fluid in the pump. Publication number: WO/2008/141377 Inventor: A.P.J. Collins Publication date: 27 November 2008
Piston rod seal for insulating cylinder of coating plant Applicant: Dürr Systems GmbH, Germany This invention relates to a piston rod seal for an insulating cylinder of an electrostatic coating plant. The piston rod supports a doctoring piston to scrape paint residues off the internal wall of the insulating cylinder. The piston rod seal has a first seal for sealing the piston rod guide. A second seal seals the piston rod guide relative to the piston rod. Further detail is included on the seal design. Publication number: WO/2008/141742 Inventors: F. Herre et al. Publication date: 27 November 2008
an angle. Publication number: WO/2008/141997 Inventors: K. Nonaka et al. Publication date: 27 November 2008
Mechanical seal device Applicant: Eagle Industry Co Ltd, Japan A tandem mechanical seal arrangement is described in which the outer seal is designed to run at a lower seal contact pressure than the inner seal and come into operation if the inner seal leaks [I think – Editor]. Several potential arrangements are shown. Publication number: WO/2008/142945 Inventor: H. Takahashi Publication date: 27 November 2008
Ductile iron pressure fix gasket Applicant: S & B Technical Products Inc, USA A seal for water pipe mains that includes a segmented series of wedges. These clip into the outer side of the seal before insertion. They permit easy assembly of the pipe but resist pull out. Publication number: WO/2008/143743 Inventors: G. Darce et al. Publication date: 27 November 2008
Grid thrust reverser cover comprising seal support and associated seal Applicant: Aircelle, France This seal is designed to overcome the problem of the dislodging of seals in the thrust reverser of turbofan engines. The seal is latched into a retainer that may be metallic, plastic or carbon fibre. Publication number: WO/2008/142218 Inventors: G. Vauchel et al. Publication date: 27 November 2008
Seal arrangement Applicant: Mann+Hummel GmbH, Germany
A radial seal to fit between a housing and a shaft is described. At each radial extremity the seal has a relatively thick section containing a U-section metal reinforcing member. The remaining radial section is shown as a flexible membrane to accommodate radial movement. The intended application, or whether this is a static or dynamic seal, is not explained, but the applicant manufactures filters and air intake systems. Publication number: WO/2008/145542 Inventor: T. Hilpert Publication date: 4 December 2008
Wheel hub bearing unit for a vehicle and a gasket Applicant: AB SKF, Sweden A wheel hub unit for vehicles has a mounting flange for the brake disc that includes a gasket containing sacrificial metal to prevent corrosion. This helps to ensure good alignment when the brake discs are replaced. Publication number: WO/2008/145162 Inventors: H.J. Kapaan et al. Publication date: 4 December 2008
Self energizing seal element Applicant: Baker Hughes Inc, USA A metal to metal seal that is designed to be self-energizing is described. The outside dimension at surfaces 12 and 14 and the inside dimension at surfaces 16 and 18 are designed to be a radial interference fit. When the seal is assembled in an annulus the interference causes the seal to expand axially which due to the inner and outer surfaces being offset creates a radial sealing force. One or more seal components such as elastomeric, rubber, plastic or soft metal, may be fitted into the surface grooves 28 or 38 to enhance the low-pressure sealing performance. Publication number: WO/2008/147707 Inventor: M.P. Coronado Publication date: 4 December 2008
Brush seal Applicant: Siemens AG, Germany This brush seal is designed to work effectively with a wider range of relative movement between the rotor and the stator of a machine than conventional brush seals. This is achieved by the bristles being arranged at 12
Sealing Technology
The self energising metal seal described in WO/2008/147707.
April 2009
Seal assembly for a pump Applicant: APC Co Pty Ltd, Australia The invention is intended for pumps in the slurry, waste, pulp, paper and chemical industries. The seal assembly comprises a seal housing that contains a mechanical seal as the external seal and what is described as a hydraulic seal, preferably a lip seal as an internal seal. A flush fluid is provided to the seal chamber and the hydraulic seal controls the flow between the pump and the chamber depending on the operating conditions. The system will also ensure that the mechanical seal does not run dry if there is no process fluid in the pump. Publication number: WO/2008/141377 Inventor: A.P.J. Collins Publication date: 27 November 2008
Piston rod seal for insulating cylinder of coating plant Applicant: Dürr Systems GmbH, Germany This invention relates to a piston rod seal for an insulating cylinder of an electrostatic coating plant. The piston rod supports a doctoring piston to scrape paint residues off the internal wall of the insulating cylinder. The piston rod seal has a first seal for sealing the piston rod guide. A second seal seals the piston rod guide relative to the piston rod. Further detail is included on the seal design. Publication number: WO/2008/141742 Inventors: F. Herre et al. Publication date: 27 November 2008
an angle. Publication number: WO/2008/141997 Inventors: K. Nonaka et al. Publication date: 27 November 2008
Mechanical seal device Applicant: Eagle Industry Co Ltd, Japan A tandem mechanical seal arrangement is described in which the outer seal is designed to run at a lower seal contact pressure than the inner seal and come into operation if the inner seal leaks [I think – Editor]. Several potential arrangements are shown. Publication number: WO/2008/142945 Inventor: H. Takahashi Publication date: 27 November 2008
Ductile iron pressure fix gasket Applicant: S & B Technical Products Inc, USA A seal for water pipe mains that includes a segmented series of wedges. These clip into the outer side of the seal before insertion. They permit easy assembly of the pipe but resist pull out. Publication number: WO/2008/143743 Inventors: G. Darce et al. Publication date: 27 November 2008
Grid thrust reverser cover comprising seal support and associated seal Applicant: Aircelle, France This seal is designed to overcome the problem of the dislodging of seals in the thrust reverser of turbofan engines. The seal is latched into a retainer that may be metallic, plastic or carbon fibre. Publication number: WO/2008/142218 Inventors: G. Vauchel et al. Publication date: 27 November 2008
Seal arrangement Applicant: Mann+Hummel GmbH, Germany
A radial seal to fit between a housing and a shaft is described. At each radial extremity the seal has a relatively thick section containing a U-section metal reinforcing member. The remaining radial section is shown as a flexible membrane to accommodate radial movement. The intended application, or whether this is a static or dynamic seal, is not explained, but the applicant manufactures filters and air intake systems. Publication number: WO/2008/145542 Inventor: T. Hilpert Publication date: 4 December 2008
Wheel hub bearing unit for a vehicle and a gasket Applicant: AB SKF, Sweden A wheel hub unit for vehicles has a mounting flange for the brake disc that includes a gasket containing sacrificial metal to prevent corrosion. This helps to ensure good alignment when the brake discs are replaced. Publication number: WO/2008/145162 Inventors: H.J. Kapaan et al. Publication date: 4 December 2008
Self energizing seal element Applicant: Baker Hughes Inc, USA A metal to metal seal that is designed to be self-energizing is described. The outside dimension at surfaces 12 and 14 and the inside dimension at surfaces 16 and 18 are designed to be a radial interference fit. When the seal is assembled in an annulus the interference causes the seal to expand axially which due to the inner and outer surfaces being offset creates a radial sealing force. One or more seal components such as elastomeric, rubber, plastic or soft metal, may be fitted into the surface grooves 28 or 38 to enhance the low-pressure sealing performance. Publication number: WO/2008/147707 Inventor: M.P. Coronado Publication date: 4 December 2008
Brush seal Applicant: Siemens AG, Germany This brush seal is designed to work effectively with a wider range of relative movement between the rotor and the stator of a machine than conventional brush seals. This is achieved by the bristles being arranged at 12
Sealing Technology
The self energising metal seal described in WO/2008/147707.
April 2009