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Mechanical seal assembly for jet engines
PATENTS
Head gasket assembly for high-performance IC engines
Shaped sealing gasket for chemical barrel screw caps
Applicant: Coltec Industries Inc, USA
Applicant/Inventor: G. Englund (USA)
This invention relates to cylinder head gaskets for use in high performance internal combustion engines in high temperature and high pressure applications. A dry deck configuration requires discrete seal elements to be used to seal coolant and oil locations as well as the combustion chamber. This has traditionally been accomplished by using individual O-rings for the coolant and oil seal locations and individual combustion seals, such as metal O-rings. This involves costly machining, limiting its use in the marketplace. The present invention is directed towards a head gasket specifically designed for high temperature and high pressure applications, where the compression of discrete coolant, oil and combustion seals are specifically and accurately controlled, and machining of the head or block is not required. This head gasket
This invention described here is a shaped seal or gasket for use with a screw cap as commonly used in chemical barrels. The gasket has a profile that includes a winged portion for contacting a sealing surface that defines a concave surface. The
Example of the controlled compression seal for coolant or lubricant passages in a cylinder head gasket for high performance engines, from WO 2005/012769.
assembly provides controlled compression of the seals and eliminates the need to machine the engine block, cylinder head or cylinder liner. The combustion seal may also be a metallic seal, preferably a spring-energized metallic seal. Patent number: WO 2005/012769 Inventors: J.T. Adams et al. Publication date: 10 February 2005
Mechanical seal assembly for jet engines Applicant: Burgmann Industries GmbH, Germany The invention relates to the rotary seal ring (1) of a mechanical seal assembly for jet engines. The seal ring is produced from a composite material of fiber-reinforced ceramic. Carbon or silicon carbide (SiC) fibers can constitute the reinforcement fibers, and the ceramic can be a SiC material. Composite seal rings of this type can also be equipped with lift features on the seal face. The SiC matrix is not
gasket has a second surface, or zone of contact, for contacting against the underside of a screw cap. The winged portion of the gasket profile is wider than the zone of contact. Patent number: WO 2005/012770 Publication date: 10 February 2005
subject to brittle fracture, so it is comparable with a steel ring of this type in terms of functional safety. Wear is significantly reduced and the ring requires no cooling, whereas steel rings must contain channels for circulation of a coolant. Patent number: WO 2005/015063 Inventors: P. Haselbacher and T. Keller Publication date: 17 February 2005
The screw cap seal described in WO 2005/012770.
Diaphragm seal for use in a medicinal aerosol Applicant: 3M Innovative Properties Co, USA This invention relates to medicinal aerosols, such as metered dose inhalers. Leakage and moisture ingress can limit the shelf life of a medicinal aerosol. Leakage of propellant from a metered dose inhaler (MDI) during storage will lead to an increase in concentration of the other components, such as the drug and excipient, leading to a change in the delivery dosage of drug and excipient. It has been found that using a layered combination of differing seal materials around the valve can provide performance characteristics that are not anticipated by the performance of the seal materials used individually. The diaphragm comprises a first layer of a non-cross-linked rubber and a second layer comprised of a cross-linked thermoplastic elastomer. It is thought that the
first layer provides the diaphragm with the advantages of a highly deformable layer that helps to provide a very tight seal. The second layer provides the advantages of a firmer elastomer that avoids longterm compression set. The benefit of the present invention is that the disadvantages of each layer when used individually are overcome by the presence of the other layer, thus providing an improvement not expected from the individual performance of either layer. It is suggested that the diaphragm comprises a first layer with a compression set of 30% or more, and a second layer with a compression set of 20% or less. Patent number: WO 2005/014078 Inventors: T.A. Winker and T.D. Alband Publication date: 17 February 2005
Sealing arrangement and universal joint system Applicant: Voith Turbo GmbH, Germany
Cross-section of the mechanical seal for jet engine applications in WO 2005/015063, with a rotary seal ring manufactured from fiber-reinforced silicon carbide.
Sealing Technology May 2005
The invention relates to a sealing arrangement for sealing bearings in the universal joints of cardan shafts. There is an annular element for supporting a one-piece triple seal. Two sealing lips are arranged parallel to each other, and seal on a cylindrical surface. The third sealing lip seals on a radial surface. Patent number: WO 2005/017376 Inventors: P. Grawenhof, H. Wegmann and H. Lindenthal Publication date: 24 February 2005
The triple seal for a universal joint on cardan shafts, from WO 2005/017376.
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Head gasket assembly for high-performance IC engines
Shaped sealing gasket for chemical barrel screw caps
Applicant: Coltec Industries Inc, USA
Applicant/Inventor: G. Englund (USA)
This invention relates to cylinder head gaskets for use in high performance internal combustion engines in high temperature and high pressure applications. A dry deck configuration requires discrete seal elements to be used to seal coolant and oil locations as well as the combustion chamber. This has traditionally been accomplished by using individual O-rings for the coolant and oil seal locations and individual combustion seals, such as metal O-rings. This involves costly machining, limiting its use in the marketplace. The present invention is directed towards a head gasket specifically designed for high temperature and high pressure applications, where the compression of discrete coolant, oil and combustion seals are specifically and accurately controlled, and machining of the head or block is not required. This head gasket
This invention described here is a shaped seal or gasket for use with a screw cap as commonly used in chemical barrels. The gasket has a profile that includes a winged portion for contacting a sealing surface that defines a concave surface. The
Example of the controlled compression seal for coolant or lubricant passages in a cylinder head gasket for high performance engines, from WO 2005/012769.
assembly provides controlled compression of the seals and eliminates the need to machine the engine block, cylinder head or cylinder liner. The combustion seal may also be a metallic seal, preferably a spring-energized metallic seal. Patent number: WO 2005/012769 Inventors: J.T. Adams et al. Publication date: 10 February 2005
Mechanical seal assembly for jet engines Applicant: Burgmann Industries GmbH, Germany The invention relates to the rotary seal ring (1) of a mechanical seal assembly for jet engines. The seal ring is produced from a composite material of fiber-reinforced ceramic. Carbon or silicon carbide (SiC) fibers can constitute the reinforcement fibers, and the ceramic can be a SiC material. Composite seal rings of this type can also be equipped with lift features on the seal face. The SiC matrix is not
gasket has a second surface, or zone of contact, for contacting against the underside of a screw cap. The winged portion of the gasket profile is wider than the zone of contact. Patent number: WO 2005/012770 Publication date: 10 February 2005
subject to brittle fracture, so it is comparable with a steel ring of this type in terms of functional safety. Wear is significantly reduced and the ring requires no cooling, whereas steel rings must contain channels for circulation of a coolant. Patent number: WO 2005/015063 Inventors: P. Haselbacher and T. Keller Publication date: 17 February 2005
The screw cap seal described in WO 2005/012770.
Diaphragm seal for use in a medicinal aerosol Applicant: 3M Innovative Properties Co, USA This invention relates to medicinal aerosols, such as metered dose inhalers. Leakage and moisture ingress can limit the shelf life of a medicinal aerosol. Leakage of propellant from a metered dose inhaler (MDI) during storage will lead to an increase in concentration of the other components, such as the drug and excipient, leading to a change in the delivery dosage of drug and excipient. It has been found that using a layered combination of differing seal materials around the valve can provide performance characteristics that are not anticipated by the performance of the seal materials used individually. The diaphragm comprises a first layer of a non-cross-linked rubber and a second layer comprised of a cross-linked thermoplastic elastomer. It is thought that the
first layer provides the diaphragm with the advantages of a highly deformable layer that helps to provide a very tight seal. The second layer provides the advantages of a firmer elastomer that avoids longterm compression set. The benefit of the present invention is that the disadvantages of each layer when used individually are overcome by the presence of the other layer, thus providing an improvement not expected from the individual performance of either layer. It is suggested that the diaphragm comprises a first layer with a compression set of 30% or more, and a second layer with a compression set of 20% or less. Patent number: WO 2005/014078 Inventors: T.A. Winker and T.D. Alband Publication date: 17 February 2005
Sealing arrangement and universal joint system Applicant: Voith Turbo GmbH, Germany
Cross-section of the mechanical seal for jet engine applications in WO 2005/015063, with a rotary seal ring manufactured from fiber-reinforced silicon carbide.
Sealing Technology May 2005
The invention relates to a sealing arrangement for sealing bearings in the universal joints of cardan shafts. There is an annular element for supporting a one-piece triple seal. Two sealing lips are arranged parallel to each other, and seal on a cylindrical surface. The third sealing lip seals on a radial surface. Patent number: WO 2005/017376 Inventors: P. Grawenhof, H. Wegmann and H. Lindenthal Publication date: 24 February 2005
The triple seal for a universal joint on cardan shafts, from WO 2005/017376.
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