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Sealant for liquid-crystal “dropping method”
PATENTS installation – wherein the sealing ring experiences a twisting (Ya) action about a centre of its profile during the installation. This results in a sealing ring that has increased sealing performance and a longer service life. The use of symmetrical parts reduces tooling costs. The twisting of the profile of the gasket preferably falls between 19º and 22º, and the sealing lip preferably has a radius of between 0.1 mm and 0.4 mm. An advantage of this design is that the sealing ring has at least three bearing surfaces The piston and rings are used, for example, in an automotive system. The patent mentions antilock braking systems, electro-hydraulic brakes and traction control units. The seal ring can be used not only in the previously mentioned pumping systems, but in all systems in which dynamically changing, translationally stressed sealing rings are required. Patent number: WO/2012/022519 Inventor: D. Gosse Publication date: 23 February 2012
is defined as a ‘‘catch channel’’ (22) to improve the design’s ability to exclude contaminants. Patent number: WO/2012/019803 Inventors: A. Häpp and W. Walter Publication date: 16 February 2012
Sealing arrangement for an electric motor or generator Applicant: Protean Electric Ltd, UK This patent covers a design for an electric wheel motor that has both improved stability and sealing. To avoid sealing the relatively large diameter of the motor, a flange is fitted to the front of the motor’s casing, which includes an additional bearing and a seal, with a relatively small diameter. Patent number: WO/2012/020349 Inventor: E. Jaganjac Publication date: 16 February 2012
Seal inspection Applicant: Toyo Seikan Kaisha Ltd, Japan A device for inspecting the seal on food and beverage containers forms the subject of this patent. It involves a pressure-drop test, applied externally to the lid. A sealed flange assembly that surrounds the lid is illustrated. Patent number: WO/2012/020543 Inventors: S. Yamamoto, T. Yamada, Y. Tatsumi and M. Kaneda Publication date: 16 February 2012
Sealant for liquid-crystal ‘‘dropping method’’ Applicant: Sekisui Chemical Co Ltd, Japan According to this patent’s abstract, the purpose of this invention is to provide a sealant for a liquidcrystal ‘‘dropping method’’. The adhesion and humidity resistance of the cured product are excellent and there is virtually no contamination of the liquid crystal. This patent describes a sealant that is composed of a curable resin, a fluorine compound and a photo-polymerisation initiator and/ or thermosetting agent. The curable resin contains 50 wt% or more of a fully (meth)acrylic-modified epoxy resin that is obtained by reacting all of the epoxy groups in a starting epoxy resin with (meth) acrylic acid. The fluorine compound has reactive functional groups that are capable of reacting with the curable resin and contains 1.0–9.0 mass% of fluorine. The fluorine compound content is 0.1–5 parts, by weight, per 100 parts, by weight, of the curable resin. Patent number: WO/2012/020754 Inventor: H. Hayashi Publication date: 16 February 2012 14
Sealing Technology
An example of the piston pump seal – detailed by patent WO/2012/022519 – that is deformed on assembly.
Technical Editor’s comment: I imagine that this is a pump with a very short stroke.
Static seal Sealing assembly for a cable conduit junction Applicant: CMP Products Ltd, UK An assembly for sealing a conduit junction is detailed by this patent. It is able to accommodate a cable that has a plurality of cores. The assembly comprises a dispenser apparatus for a curable liquid material and a barrier member for restricting the extent of penetration of the curable liquid material along the cores, and a flexible member which has at least one aperture. This is designed to replace mineral wool packing that is used in many installations. Patent number: WO/2011/021017 Inventor: S.L. Proud Publication date: 24 February 2012
Sealing ring for a piston pump Applicant: Robert Bosch GmbH, Germany This invention relates to a sealing ring for a piston pump. The patent describes an outer circumferential surface (22a) in which at least one circumferential groove (24a) is formed, and an inner circumferential surface (26a) on which at least one circumferential sealing lip (28a) is formed. ‘‘Limbs’’ (30a & 31a) each form a defined angle (1a & 2a) with the running surface (18a) when the sealing ring (10a) is installed. The defined angles (1a, 2a) are achieved by deforming the sealing ring during
Applicant: Siemens Aktiengesellschaft, Germany Details are provided of a static seal for the casing of a large turbo-compressor, which may have a diameter that exceeds 2 m. The sealing ring is divided into several segments that are arranged behind each other in a tangential plane and can be displaced relative to each other. A form of stepped butt joint is used to allow for the relative movement of the seal ring segments. This segmented design allows large gap changes, for example, during stationary phases of a warm-up, which can cause problems with O-rings. The seal can be made of a flameproof material. Patent number: WO/2012/022550 Inventors: M. Schulte and M. van der Horst Publication date: 23 February 2012
Moulding with a gas barrier layer for an electronic device Applicant: Lintec Corp, Japan This patent provides details of a moulding that contains a gas barrier layer. It has a surface layer made from a material that contains carbon, oxygen, nitrogen and silicon atoms. The proportion of carbon atoms present is more than 0%, but not more than 70%; the proportion of oxygen atoms present is 10–70% inclusive; the proportion of nitrogen atoms present is 0–35% inclusive; and the proportion of silicon atoms present is 20–55% inclusive. This moulding has excellent gas barrier properties, transparency
August 2012
is defined as a ‘‘catch channel’’ (22) to improve the design’s ability to exclude contaminants. Patent number: WO/2012/019803 Inventors: A. Häpp and W. Walter Publication date: 16 February 2012
Sealing arrangement for an electric motor or generator Applicant: Protean Electric Ltd, UK This patent covers a design for an electric wheel motor that has both improved stability and sealing. To avoid sealing the relatively large diameter of the motor, a flange is fitted to the front of the motor’s casing, which includes an additional bearing and a seal, with a relatively small diameter. Patent number: WO/2012/020349 Inventor: E. Jaganjac Publication date: 16 February 2012
Seal inspection Applicant: Toyo Seikan Kaisha Ltd, Japan A device for inspecting the seal on food and beverage containers forms the subject of this patent. It involves a pressure-drop test, applied externally to the lid. A sealed flange assembly that surrounds the lid is illustrated. Patent number: WO/2012/020543 Inventors: S. Yamamoto, T. Yamada, Y. Tatsumi and M. Kaneda Publication date: 16 February 2012
Sealant for liquid-crystal ‘‘dropping method’’ Applicant: Sekisui Chemical Co Ltd, Japan According to this patent’s abstract, the purpose of this invention is to provide a sealant for a liquidcrystal ‘‘dropping method’’. The adhesion and humidity resistance of the cured product are excellent and there is virtually no contamination of the liquid crystal. This patent describes a sealant that is composed of a curable resin, a fluorine compound and a photo-polymerisation initiator and/ or thermosetting agent. The curable resin contains 50 wt% or more of a fully (meth)acrylic-modified epoxy resin that is obtained by reacting all of the epoxy groups in a starting epoxy resin with (meth) acrylic acid. The fluorine compound has reactive functional groups that are capable of reacting with the curable resin and contains 1.0–9.0 mass% of fluorine. The fluorine compound content is 0.1–5 parts, by weight, per 100 parts, by weight, of the curable resin. Patent number: WO/2012/020754 Inventor: H. Hayashi Publication date: 16 February 2012 14
Sealing Technology
An example of the piston pump seal – detailed by patent WO/2012/022519 – that is deformed on assembly.
Technical Editor’s comment: I imagine that this is a pump with a very short stroke.
Static seal Sealing assembly for a cable conduit junction Applicant: CMP Products Ltd, UK An assembly for sealing a conduit junction is detailed by this patent. It is able to accommodate a cable that has a plurality of cores. The assembly comprises a dispenser apparatus for a curable liquid material and a barrier member for restricting the extent of penetration of the curable liquid material along the cores, and a flexible member which has at least one aperture. This is designed to replace mineral wool packing that is used in many installations. Patent number: WO/2011/021017 Inventor: S.L. Proud Publication date: 24 February 2012
Sealing ring for a piston pump Applicant: Robert Bosch GmbH, Germany This invention relates to a sealing ring for a piston pump. The patent describes an outer circumferential surface (22a) in which at least one circumferential groove (24a) is formed, and an inner circumferential surface (26a) on which at least one circumferential sealing lip (28a) is formed. ‘‘Limbs’’ (30a & 31a) each form a defined angle (1a & 2a) with the running surface (18a) when the sealing ring (10a) is installed. The defined angles (1a, 2a) are achieved by deforming the sealing ring during
Applicant: Siemens Aktiengesellschaft, Germany Details are provided of a static seal for the casing of a large turbo-compressor, which may have a diameter that exceeds 2 m. The sealing ring is divided into several segments that are arranged behind each other in a tangential plane and can be displaced relative to each other. A form of stepped butt joint is used to allow for the relative movement of the seal ring segments. This segmented design allows large gap changes, for example, during stationary phases of a warm-up, which can cause problems with O-rings. The seal can be made of a flameproof material. Patent number: WO/2012/022550 Inventors: M. Schulte and M. van der Horst Publication date: 23 February 2012
Moulding with a gas barrier layer for an electronic device Applicant: Lintec Corp, Japan This patent provides details of a moulding that contains a gas barrier layer. It has a surface layer made from a material that contains carbon, oxygen, nitrogen and silicon atoms. The proportion of carbon atoms present is more than 0%, but not more than 70%; the proportion of oxygen atoms present is 10–70% inclusive; the proportion of nitrogen atoms present is 0–35% inclusive; and the proportion of silicon atoms present is 20–55% inclusive. This moulding has excellent gas barrier properties, transparency
August 2012