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Seal designs for multicomponent bipolar plates of an electrochemical cell
PATENTS Seal for energy storage devices Applicant: Battelle Memorial Institute, USA The subject of this patent is a compliant polymer seal and process for sealing sodiumconducting energy storage devices and batteries. Compliant polymer seals become viscous when operating at a specific temperature, which seals together cathode and anode chambers, and other components, following assembly. These seals can accommodate thermal expansion mismatches between selected components during operation. Patent number: WO/2016/028351 Inventors: G. Li, K.D. Meinhardt, X. Lu, J.Y. Kim and V.L. Sprenkle Publication date: 25 February 2016
Dynamic radial seal Applicant: Aktiebolaget SKF, Sweden This patent provides details of an arrangement for sealing a radial gap between an inner component and an outer component. The latter is coaxially mounted around the inner component, which is able to rotate about an axis. This patent describes an arrangement that consists of a radial seal that is mounted in connection with the inner component, in such a way that it (radial seal) has a sealing lip that bears against a counterface formed by a radially inner surface of the outer component (or of a sleeve element that is mounted to the outer component). When the seal arrangement is stationary, the sealing lip bears against the counterface with an initial lip force. According to the inventors, the sealing lip is arranged (so that it is capable of pivoting) in a radial cross section around a pivot point, and is connected to a counterweight. The sealing lip and counterweight are arranged in different axial regions from the pivot point and are adapted such that during rotation of the radial seal, a greater centrifugal force acts on the counterweight than on the sealing lip. Patent number: WO/2016/030086 Inventors: M. Organisciak, C. Foti and P. Baart Publication date: 3 March 2016
Sealed structure for containing and protecting electronic devices Applicant: Corning Inc, USA Disclosed are details of a sealed structure for containing electronic devices. The structure described comprises a first glass substrate, second glass substrate and an optional sealing layer between these substrates. In addition, there is also at least one seal between the first and second substrates. The
January 2017
sealed devices may consist of at least one cavity containing a component chosen from the following: laser diodes, light emitting diodes (LEDs), organic LEDs, quantum dots and a combination of these. Details are also given of display units that comprise the sealed devices. Patent number: WO/2016/032885 Inventors: S.L. Logunov, M.A. Quesada and A.M. Streltsov Publication date: 3 March 2016
System for sealing a watercraft shaft Applicant: SKF Blohm + Voss Industries GmbH, Germany This invention relates to a system for sealing a shaft that is located under water – in particular, the propeller shaft of a ship. The system detailed by this patent comprises two sealing units. The sealing unit that is furthermost from the propeller preferably has at least one lip seal for separating an air chamber from a lubricant chamber, whilst the sealing unit that is closest to the propeller has a slide-ring seal. The air pressure in the air chamber is greater than the lubricating-oil pressure in the lubricant chamber. Patent number: WO/2016/030159 Inventors: C. Fangauf and J. Brand Publication date: 3 March 2016
Lip-seal compression-type pipe fitting coupling Applicant: Shenzhen Artway Piping Corp, China A lip-seal compression-type pipe coupling forms the subject of this patent. The patent describes a pipe fitting that has a socket; a pipe inserted into the socket of the pipe fitting; and a sealing ring that has a main ring and an annular lip, and is arranged between the inner sidewall of the socket of the pipe fitting and part of the outer sidewall of the pipe inserted into the socket. The annular lip is a cylindrical cone and is angled at 0–89° to the axial direction of the pipe. The annular lip of the sealing ring is affixed to the outer wall of the pipe and maintains a seal-squeeze ratio of 10–35%. The outer diameter of the main ring of the sealing ring is affixed to and kept in sealed compression with an outward protruding annular inner groove of the pipe fitting. In addition, also provided is an installation method for the pipe coupling. The lip seal, compression-type pipe coupling and the installation method have the advantages of structural stability, great sealing performance and extended service life, claims the inventor. Patent number: WO/2016/029760 Inventor: Z. Chen Publication date: 3 March 2016
Age-resistant polyurethane seal Applicant: BASF Se, Germany A method has been developed for producing seals made from polyurethane. This patent describes the process in which aliphatic polyisocyanate, compounds containing at least two isocyanate-reactive groups, catalysts, antioxidants and/or light stabilisers, and, if necessary, blowing agents, and auxiliary agents and/or additives, are mixed to form a reaction mixture that produces polyurethane. The seal that is made from polyurethane has a Shore A hardness of less than 90 and an density of at least 850 g/l. The polymeric compounds have isocyanate-reactive groups containing: polyetherols, with a functionality of 2–4 and a hydroxyl number of 20–100 mg KOH/g; hydrophobic polyols with an OH number of less than 180 mg KOH/g and a functionality of greater than 2–3; and chain extenders. This invention further relates to a polyurethane seal obtained according to such a method, and to the use of this seal in contact with rubber. Patent number: WO/2016/030111 Inventors: S. Bokern, P. Coppens, P. Bolze, T. Mathieu and C. Melloh Publication date: 3 March 2016
Seal designs for multicomponent bipolar plates of an electrochemical cell Applicant: Nuvera Fuel Cells Inc, USA A method for sealing a multicomponent bipolar plate is disclosed. The method described involves inserting a first seal between a first component and a second component, wherein the first seal is aligned with a first plurality of protrusions, formed on a surface of at least one of the (first or second) components. The method may also involve compressing the first and second components to cause the penetration of the first plurality of protrusions into the first seal. The method may further include plastically deforming the first seal in order to create a first sealing surface between the first and second components. Patent number: WO/2016/033147 Inventors: E. Domit, S. Blanchet, R. van Boeyen and K. Beverage Publication date: 3 March 2016
Method for checking a connection seal between two parts Applicant: Safran Aircraft Engines, France This invention relates to a method for checking a connection seal between two elements of
Sealing Technology
13
Dynamic radial seal Applicant: Aktiebolaget SKF, Sweden This patent provides details of an arrangement for sealing a radial gap between an inner component and an outer component. The latter is coaxially mounted around the inner component, which is able to rotate about an axis. This patent describes an arrangement that consists of a radial seal that is mounted in connection with the inner component, in such a way that it (radial seal) has a sealing lip that bears against a counterface formed by a radially inner surface of the outer component (or of a sleeve element that is mounted to the outer component). When the seal arrangement is stationary, the sealing lip bears against the counterface with an initial lip force. According to the inventors, the sealing lip is arranged (so that it is capable of pivoting) in a radial cross section around a pivot point, and is connected to a counterweight. The sealing lip and counterweight are arranged in different axial regions from the pivot point and are adapted such that during rotation of the radial seal, a greater centrifugal force acts on the counterweight than on the sealing lip. Patent number: WO/2016/030086 Inventors: M. Organisciak, C. Foti and P. Baart Publication date: 3 March 2016
Sealed structure for containing and protecting electronic devices Applicant: Corning Inc, USA Disclosed are details of a sealed structure for containing electronic devices. The structure described comprises a first glass substrate, second glass substrate and an optional sealing layer between these substrates. In addition, there is also at least one seal between the first and second substrates. The
January 2017
sealed devices may consist of at least one cavity containing a component chosen from the following: laser diodes, light emitting diodes (LEDs), organic LEDs, quantum dots and a combination of these. Details are also given of display units that comprise the sealed devices. Patent number: WO/2016/032885 Inventors: S.L. Logunov, M.A. Quesada and A.M. Streltsov Publication date: 3 March 2016
System for sealing a watercraft shaft Applicant: SKF Blohm + Voss Industries GmbH, Germany This invention relates to a system for sealing a shaft that is located under water – in particular, the propeller shaft of a ship. The system detailed by this patent comprises two sealing units. The sealing unit that is furthermost from the propeller preferably has at least one lip seal for separating an air chamber from a lubricant chamber, whilst the sealing unit that is closest to the propeller has a slide-ring seal. The air pressure in the air chamber is greater than the lubricating-oil pressure in the lubricant chamber. Patent number: WO/2016/030159 Inventors: C. Fangauf and J. Brand Publication date: 3 March 2016
Lip-seal compression-type pipe fitting coupling Applicant: Shenzhen Artway Piping Corp, China A lip-seal compression-type pipe coupling forms the subject of this patent. The patent describes a pipe fitting that has a socket; a pipe inserted into the socket of the pipe fitting; and a sealing ring that has a main ring and an annular lip, and is arranged between the inner sidewall of the socket of the pipe fitting and part of the outer sidewall of the pipe inserted into the socket. The annular lip is a cylindrical cone and is angled at 0–89° to the axial direction of the pipe. The annular lip of the sealing ring is affixed to the outer wall of the pipe and maintains a seal-squeeze ratio of 10–35%. The outer diameter of the main ring of the sealing ring is affixed to and kept in sealed compression with an outward protruding annular inner groove of the pipe fitting. In addition, also provided is an installation method for the pipe coupling. The lip seal, compression-type pipe coupling and the installation method have the advantages of structural stability, great sealing performance and extended service life, claims the inventor. Patent number: WO/2016/029760 Inventor: Z. Chen Publication date: 3 March 2016
Age-resistant polyurethane seal Applicant: BASF Se, Germany A method has been developed for producing seals made from polyurethane. This patent describes the process in which aliphatic polyisocyanate, compounds containing at least two isocyanate-reactive groups, catalysts, antioxidants and/or light stabilisers, and, if necessary, blowing agents, and auxiliary agents and/or additives, are mixed to form a reaction mixture that produces polyurethane. The seal that is made from polyurethane has a Shore A hardness of less than 90 and an density of at least 850 g/l. The polymeric compounds have isocyanate-reactive groups containing: polyetherols, with a functionality of 2–4 and a hydroxyl number of 20–100 mg KOH/g; hydrophobic polyols with an OH number of less than 180 mg KOH/g and a functionality of greater than 2–3; and chain extenders. This invention further relates to a polyurethane seal obtained according to such a method, and to the use of this seal in contact with rubber. Patent number: WO/2016/030111 Inventors: S. Bokern, P. Coppens, P. Bolze, T. Mathieu and C. Melloh Publication date: 3 March 2016
Seal designs for multicomponent bipolar plates of an electrochemical cell Applicant: Nuvera Fuel Cells Inc, USA A method for sealing a multicomponent bipolar plate is disclosed. The method described involves inserting a first seal between a first component and a second component, wherein the first seal is aligned with a first plurality of protrusions, formed on a surface of at least one of the (first or second) components. The method may also involve compressing the first and second components to cause the penetration of the first plurality of protrusions into the first seal. The method may further include plastically deforming the first seal in order to create a first sealing surface between the first and second components. Patent number: WO/2016/033147 Inventors: E. Domit, S. Blanchet, R. van Boeyen and K. Beverage Publication date: 3 March 2016
Method for checking a connection seal between two parts Applicant: Safran Aircraft Engines, France This invention relates to a method for checking a connection seal between two elements of
Sealing Technology
13