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Fuel cell stack and seal
PATENTS element (3). The purpose of this design is to eliminate the problem of uneven radial pressure of packing seal and also further improve performance by regulating radial seal pressure or clearance. A number of potential arrangements using variations of this concept are illustrated. Some have a relatively large number of individual components in a cartridge. Publication number: WO/2008/071084 Publication date: 19 June 2008
Fuel cell stack and seal Applicant: Staxera GmbH, Germany This invention relates to a seal for gas-tight connection of two elements of a fuel cell stack. It has an electrically non-conductive spacing component and one soldered component, which may be solid or viscous over its entire extent at the operating temperature, and couples the spacing component to at least one of the stack elements. The stack is designed to enable a force flow to compress the stack together. The method of manufacture of the seals and stack are also covered. Publication number: WO/2008/071137 Inventors: C. Wunderlich et al. Publication date: 19 June 2008
Pipe joint Applicant: Daikin Industries Ltd, Japan This patent describes a bite type pipe fitting with a predetermined torque limit, presumably to prevent over tightening of the compression olive. The ‘nut’ (12) comprises two components, the thread (14) and nut (15). At a predetermined value, which is above the required assembly torque the nut and thread separate. The mechanism is not described in the English abstract. Publication number: WO/2008/072470 Inventor: H. Nakata Publication date: 19 June 2008
This patent is concerned with Shock absorbers used for off road motorcycles. A problem encountered is the tendency of the rod seal assembly to work loose due to the vibration and the action of the bump stop on full compression. This design overcomes the problem by using a press fit cap instead of a threaded arrangement. Publication number: WO/2008/073041 Inventor: J. Söderdahl Publication date: 19 June 2008
Thermo-mechanical robust seal structure for solid oxide fuel cells Applicant: Corning Inc, USA A solid oxide fuel cell comprising a thin ceramic electrolyte sheet having an increased sheet width is disclosed. The substantially flat ceramic sheet has a particularly flat region in the seal area. The size of wrinkles possible in the seal area and potential thickness of the sheet are covered in considerable detail. Manufacturing methods are also discussed. Publication number: WO/2008/073328 Inventors: M.E. Badding et al. Publication date: 19 June 2008
Gas diffusion layer incorporating a gasket Applicant:3M Innovative Properties Co, USA A method for manufacturing fuel cell membrane electrode assemblies (MEA) is described. The gas diffusion layer incorporates a gasket, and is termed a GIG. The gasket is formed in two layers, the first a rigid polymer material such as polyethylene naphthalate (PEN), polyethylene telephthalate (PET) or polyimide and the second layer is a thermo-set elastomer such as silicone or fluorocarbon. Publication number: WO/2008/073680 Inventors: A.J.L Steinbach et al. Publication date: 19 June 2008
Magnetic earth bit seal
A bite type pipe fitting that has a predetermined breakaway torque to prevent over tightening, WO/2008/072470.
Shock absorber with seal head fixed in rotation Applicant: Öhlins Racing AB, Sweden 14
Sealing Technology
Publication date: 19 June 2008 Editor’s comment: I am not certain why both faces are considered dynamic as it would appear in the example illustrated that carrier 130 would be unlikely to move on the hub, unless face 116 were to seize.
Applicant: Atlas Copco Secoroc LLC, USA This is a mechanical face type seal for the bearings of tri-cone rock bits. A particular feature of these seals is that magnetic faces are used to increase the sealing contact pressure of the dynamic seal rings to help exclude debris from the seal faces. The magnetic seal faces 115 and 116 are held in rigid carriers 130 and 131. An annular flexible ring 132 allows relative axial movement between the two dynamic seal face rings during operation of the rock bit. A range of potential geometries are discussed. Publication number: WO/2008/073873 Inventors: G.W. Peterson et al.
An example of the magnetic face rock bit seal described in WO/2008/073873.
Dual-direction ram-type blowout preventer seal Applicant: Hydril USA Manufacturing LLC, USA The purpose of the seal arrangement described in this patent is to provide a blowout preventer that can be used for deep water sub-sea well heads. It will operate with the higher pressure being applied either from the well or sea water pressure. The design is such that there is no need for pressure equalisation or vent valves to be used to withdraw the preventer after operation. It also overcomes the major potential problem of the plugging of the pressure equalisation valves or lines which can lead to the requirement to recover the wellhead from the sea bed. Publication number: WO/2008/073874 Inventors: J.D. Juda et al. Publication date: 19 June 2008
Respirator comprising an oesophageal seal Applicant: Masterflex AG, Germany This invention relates to a respirator with a tube arrangement that is designed to be introduced through the mouth and the pharynx of a patient. The distal region of the tube arrangement has a balloon, which can be expanded by the supply of a fluid to form a seal between the tube arrangement and the inner wall of the pharynx. Publication number: WO/2008/074469 Inventor: D. Oser Publication date: 26 June 2008
Flat gasket Applicant: Robert Bosch GmbH, Germany This flat gasket is for use in axial piston hydraulic machines for the connection between
October 2008
Fuel cell stack and seal Applicant: Staxera GmbH, Germany This invention relates to a seal for gas-tight connection of two elements of a fuel cell stack. It has an electrically non-conductive spacing component and one soldered component, which may be solid or viscous over its entire extent at the operating temperature, and couples the spacing component to at least one of the stack elements. The stack is designed to enable a force flow to compress the stack together. The method of manufacture of the seals and stack are also covered. Publication number: WO/2008/071137 Inventors: C. Wunderlich et al. Publication date: 19 June 2008
Pipe joint Applicant: Daikin Industries Ltd, Japan This patent describes a bite type pipe fitting with a predetermined torque limit, presumably to prevent over tightening of the compression olive. The ‘nut’ (12) comprises two components, the thread (14) and nut (15). At a predetermined value, which is above the required assembly torque the nut and thread separate. The mechanism is not described in the English abstract. Publication number: WO/2008/072470 Inventor: H. Nakata Publication date: 19 June 2008
This patent is concerned with Shock absorbers used for off road motorcycles. A problem encountered is the tendency of the rod seal assembly to work loose due to the vibration and the action of the bump stop on full compression. This design overcomes the problem by using a press fit cap instead of a threaded arrangement. Publication number: WO/2008/073041 Inventor: J. Söderdahl Publication date: 19 June 2008
Thermo-mechanical robust seal structure for solid oxide fuel cells Applicant: Corning Inc, USA A solid oxide fuel cell comprising a thin ceramic electrolyte sheet having an increased sheet width is disclosed. The substantially flat ceramic sheet has a particularly flat region in the seal area. The size of wrinkles possible in the seal area and potential thickness of the sheet are covered in considerable detail. Manufacturing methods are also discussed. Publication number: WO/2008/073328 Inventors: M.E. Badding et al. Publication date: 19 June 2008
Gas diffusion layer incorporating a gasket Applicant:3M Innovative Properties Co, USA A method for manufacturing fuel cell membrane electrode assemblies (MEA) is described. The gas diffusion layer incorporates a gasket, and is termed a GIG. The gasket is formed in two layers, the first a rigid polymer material such as polyethylene naphthalate (PEN), polyethylene telephthalate (PET) or polyimide and the second layer is a thermo-set elastomer such as silicone or fluorocarbon. Publication number: WO/2008/073680 Inventors: A.J.L Steinbach et al. Publication date: 19 June 2008
Magnetic earth bit seal
A bite type pipe fitting that has a predetermined breakaway torque to prevent over tightening, WO/2008/072470.
Shock absorber with seal head fixed in rotation Applicant: Öhlins Racing AB, Sweden 14
Sealing Technology
Publication date: 19 June 2008 Editor’s comment: I am not certain why both faces are considered dynamic as it would appear in the example illustrated that carrier 130 would be unlikely to move on the hub, unless face 116 were to seize.
Applicant: Atlas Copco Secoroc LLC, USA This is a mechanical face type seal for the bearings of tri-cone rock bits. A particular feature of these seals is that magnetic faces are used to increase the sealing contact pressure of the dynamic seal rings to help exclude debris from the seal faces. The magnetic seal faces 115 and 116 are held in rigid carriers 130 and 131. An annular flexible ring 132 allows relative axial movement between the two dynamic seal face rings during operation of the rock bit. A range of potential geometries are discussed. Publication number: WO/2008/073873 Inventors: G.W. Peterson et al.
An example of the magnetic face rock bit seal described in WO/2008/073873.
Dual-direction ram-type blowout preventer seal Applicant: Hydril USA Manufacturing LLC, USA The purpose of the seal arrangement described in this patent is to provide a blowout preventer that can be used for deep water sub-sea well heads. It will operate with the higher pressure being applied either from the well or sea water pressure. The design is such that there is no need for pressure equalisation or vent valves to be used to withdraw the preventer after operation. It also overcomes the major potential problem of the plugging of the pressure equalisation valves or lines which can lead to the requirement to recover the wellhead from the sea bed. Publication number: WO/2008/073874 Inventors: J.D. Juda et al. Publication date: 19 June 2008
Respirator comprising an oesophageal seal Applicant: Masterflex AG, Germany This invention relates to a respirator with a tube arrangement that is designed to be introduced through the mouth and the pharynx of a patient. The distal region of the tube arrangement has a balloon, which can be expanded by the supply of a fluid to form a seal between the tube arrangement and the inner wall of the pharynx. Publication number: WO/2008/074469 Inventor: D. Oser Publication date: 26 June 2008
Flat gasket Applicant: Robert Bosch GmbH, Germany This flat gasket is for use in axial piston hydraulic machines for the connection between
October 2008