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Flat seal, particularly for flange connections
PATENTS Pump motor protector with redundant shaft seal Applicants: Schlumberger Canada Ltd et al., Canada et al. A pressure balance and temperature compensation chamber for the shaft seal on a submersible electric motor is described. A chamber between two shaft seals has a flexible element for temperature compensation. A non-return valve allows fluid to be expelled from the chamber but not enter. A compensating element compensates pressure across the second shaft seal. Redundant seal components are also included. Publication number: WO/2009/015035 Inventors: M.H. Du et al. Publication date: 29 January 2009
Piston ring Applicant: Federal-Mogul Burscheid GmbH, Germany In order to avoid burn traces on piston rings, this invention proposes providing the piston ring with a wear-resistant layer which consists of a material having a thermal conductivity of at least 180 W/ (mK). At least 5% by volume of the wear-resistant layer consists of aluminium nitride. Publication number: WO/2009/016051 Inventors: S. Hoppe et al. Publication date: 5 February 2009
Static seal for pump shaft Applicant: Weir Minerals Africa (Proprietary) Ltd, South Africa This is defined by the applicants as a static seal but is actually a pump shaft seal that centrifugally lifts during pump operation. The seal (30) includes an annular cantilever portion (40), rotary seal face (48) and circumferential weights (44). The seal is configured to dilate under centrifugal force to provide a running clearance. The rotary seal body is further configured to facilitate the breaking up of slurry which may set around the seal when the pump is inoperative. Publication number: WO/2009/016554 Inventor: S. Geldenhuys Publication date: 5 February 2009
Seal device Applicant: Eagle Industry Co Ltd, Japan A seal with external lip (20) and auxiliary seal
May 2009
A single energiser for multiple ferrules (140) is used to save space in a wellhead assembly, WO/2009/014797.
(30). The retainer for the auxiliary lip (40) is elastically deformed to snap into position in the casing. Publication number: WO/2009/017022 Inventors: T. Miyake et al. Publication date: 5 February 2009
Jet pump retention and seal method with living hinge Applicants: Continental Automotive Systems US Inc, USA This seal is designed specifically to seal the jet pump assembly that sucks fuel from a vehicle tank to the fuel pump suction reservoir. The seal also serves to decouple the jet pump from the tank assembly to reduce noise. The flexibility of the seal is provided with what is termed a living hinge. This is a section of the seal lip with reduced thickness to impart flexibility. Publication number: WO/2009/017476 Inventors: P.F. Briggs et al. Publication date: 5 February 2009
Method to improve adhesion of a formed gasket to plastic closures
Applicant/Inventor: S. Foldesi Jr., USA A method of improving the adhesion of a foam rubber gasket to a plastic cap of a food or drinks bottle is described. The plastic cap is locally heated to cause it to begin to melt in the area of deposition of the gasket. Publication number: WO/2009/018221 Publication date: 5 February 2009
Flat seal, particularly for flange connections Applicant: Carl Freudenberg KG, Germany The invention relates to a flat seal, particularly for flange connections, comprising an annular metal carrier (1) and soft material supports (2) disposed in recesses on both sides of the carrier (1). The aim is to provide a cost effective flat seal with good sealing properties, and effective edge-side encapsulation of the soft material. Publication number: WO/2009/018889 Inventor: H.J. Tückmante Publication date: 12 February 2009
Sealing Technology
15
Piston ring Applicant: Federal-Mogul Burscheid GmbH, Germany In order to avoid burn traces on piston rings, this invention proposes providing the piston ring with a wear-resistant layer which consists of a material having a thermal conductivity of at least 180 W/ (mK). At least 5% by volume of the wear-resistant layer consists of aluminium nitride. Publication number: WO/2009/016051 Inventors: S. Hoppe et al. Publication date: 5 February 2009
Static seal for pump shaft Applicant: Weir Minerals Africa (Proprietary) Ltd, South Africa This is defined by the applicants as a static seal but is actually a pump shaft seal that centrifugally lifts during pump operation. The seal (30) includes an annular cantilever portion (40), rotary seal face (48) and circumferential weights (44). The seal is configured to dilate under centrifugal force to provide a running clearance. The rotary seal body is further configured to facilitate the breaking up of slurry which may set around the seal when the pump is inoperative. Publication number: WO/2009/016554 Inventor: S. Geldenhuys Publication date: 5 February 2009
Seal device Applicant: Eagle Industry Co Ltd, Japan A seal with external lip (20) and auxiliary seal
May 2009
A single energiser for multiple ferrules (140) is used to save space in a wellhead assembly, WO/2009/014797.
(30). The retainer for the auxiliary lip (40) is elastically deformed to snap into position in the casing. Publication number: WO/2009/017022 Inventors: T. Miyake et al. Publication date: 5 February 2009
Jet pump retention and seal method with living hinge Applicants: Continental Automotive Systems US Inc, USA This seal is designed specifically to seal the jet pump assembly that sucks fuel from a vehicle tank to the fuel pump suction reservoir. The seal also serves to decouple the jet pump from the tank assembly to reduce noise. The flexibility of the seal is provided with what is termed a living hinge. This is a section of the seal lip with reduced thickness to impart flexibility. Publication number: WO/2009/017476 Inventors: P.F. Briggs et al. Publication date: 5 February 2009
Method to improve adhesion of a formed gasket to plastic closures
Applicant/Inventor: S. Foldesi Jr., USA A method of improving the adhesion of a foam rubber gasket to a plastic cap of a food or drinks bottle is described. The plastic cap is locally heated to cause it to begin to melt in the area of deposition of the gasket. Publication number: WO/2009/018221 Publication date: 5 February 2009
Flat seal, particularly for flange connections Applicant: Carl Freudenberg KG, Germany The invention relates to a flat seal, particularly for flange connections, comprising an annular metal carrier (1) and soft material supports (2) disposed in recesses on both sides of the carrier (1). The aim is to provide a cost effective flat seal with good sealing properties, and effective edge-side encapsulation of the soft material. Publication number: WO/2009/018889 Inventor: H.J. Tückmante Publication date: 12 February 2009
Sealing Technology
15