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Pipe joint seal
PATENTS Gasket for electric cables
Gasket for a muffler
Applicant: Palazzoli Spa, Italy A gasket for electric cables is detailed by this patent. It includes a main portion made from an elastic material. A hole passes longitudinally through the main body and constitutes the seat of the cable to be insulated. A longitudinal slit passes through the body of the gasket and connects the through seat to the outside, enabling – by virtue of the elastic ‘‘deformability’’ of the material of the gasket – the cable to be inserted into the through seat. A tapered plug retains the cable in the gasket. Patent number: WO/2011/042128 Inventor: B. Levi Publication date: 14 April 2011
Applicant: Hamamatsu Gasket Corp, Japan A gasket for a vehicle exhaust joint forms the subject of this patent. A sheet of metallic mesh and a softer gasket material are partially overlapped. They are then rolled into a tube and compressed axially to form the gasket. This creates a gasket that combines the strength of the mesh portion with the sealing characteristics of the material. The gasket is compressed radially between mating exhaust pipes by a circumferential clamp. Patent number: WO/2011/042933 Inventor: Y. Sakai Publication date: 14 April 2011
Rolling bearing with integral labyrinth seal
Pipe joint seal
Applicant: Schaeffler Technologies GmbH & Co Kg, Germany A needle roller bearing has been developed with an integral labyrinth seal. According to the patent covering this invention, the sealing element (9) can be assembled from two individual, mutually engaging sealing rings (10, 11) designed to have complementary profile cross-sections. Patent number: WO/2011/042271 Inventors: N. Metten, T. Beck and D. Jauernig Publication date: 14 April 2011
Applicant: Kubota Corp, Japan This patent covers a pipe joint seal for pushin type fittings. The design incorporates a seal portion that has what is referred to as a ‘‘detachment prevention function’’. The outer peripheral surface of the insertion sleeve can be prevented from being damaged by protrusions of a locking portion. The locking portion for preventing detachment is embedded in the main body of the seal portion, which possesses elasticity and can be compressed. Protrusions that engage with the outer peripheral surface of an insertion sleeve – when the insertion sleeve is detached from the receiving sleeve – are formed on the locking portion. A locking ring is rotated if the pipe starts to withdraw and retains the assembly. Patent number: WO/2011/043113 Inventors: K. Kaneko, Keita, T. Ochi and H. Yukuno Publication date: 14 April 2011
Seal device
Patent WO/2011/042271 provides details of a rolling bearing with an integral labyrinth seal.
September 2011
Applicant: NOK Corp, Japan A wide range of seal designs are described by this patent. A common feature is that the sealing action is provided against the radial face of the seal groove when pressurised in one direction, and by radial interference when there is low differential or pressure from the opposite direction. The designs illustrated vary from lip-
type seals to co-axial seals and other less familiar geometries. Patent number: WO/2011/043190 Inventors: H. Tadano, H. Monma and S. Sekine Publication date: 14 April 2011
Coupler with inner seal that prohibits deposits Applicants/Inventors: F.U. Zamaleev, M.F. Gaysin and A.N. Pilugin – Russia This invention relates to couplers, including an inner seal, which are used to connect pipes. According to a first variant, the coupler includes an inner seal made of a polymer that has a low heat-conductivity, and comprises a smooth surface in the form of a coating on its inner wall. This design increases the sealing resistance of a pipe connection and simplifies the process of mounting the connection. No applications or methods of actually joining the pipes are discussed in the English abstract. Patent number: WO/2011/043689 Publication date: 14 April 2011
Low insertion-force sealing device capable of self restraint and joint deflection Applicant: Mueller International Inc, USA This invention is directed at couplings and methods of coupling – particularly bell and spigot couplings for utility pipe lines. According to the inventors, there is a need for a connection that is less sensitive to misalignment and temperature extremes, has reduced frictional resistance to the insertion of the spigot until the desired connection is achieved and the coupling is maintained, yet ensures that a seal under high pressure is retained, even when the joint is deflected. The sealing device described comprises a locking segment that consist of a convex outer surface and a K-type gasket (coupled to the locking segment) or a non-restraining anti-extrusion segment. Patent number: WO/2011/043836 Inventors: W.W. Holmes and W.H. Owen Publication date: 14 April 2011
Sealing Technology
15
Gasket for a muffler
Applicant: Palazzoli Spa, Italy A gasket for electric cables is detailed by this patent. It includes a main portion made from an elastic material. A hole passes longitudinally through the main body and constitutes the seat of the cable to be insulated. A longitudinal slit passes through the body of the gasket and connects the through seat to the outside, enabling – by virtue of the elastic ‘‘deformability’’ of the material of the gasket – the cable to be inserted into the through seat. A tapered plug retains the cable in the gasket. Patent number: WO/2011/042128 Inventor: B. Levi Publication date: 14 April 2011
Applicant: Hamamatsu Gasket Corp, Japan A gasket for a vehicle exhaust joint forms the subject of this patent. A sheet of metallic mesh and a softer gasket material are partially overlapped. They are then rolled into a tube and compressed axially to form the gasket. This creates a gasket that combines the strength of the mesh portion with the sealing characteristics of the material. The gasket is compressed radially between mating exhaust pipes by a circumferential clamp. Patent number: WO/2011/042933 Inventor: Y. Sakai Publication date: 14 April 2011
Rolling bearing with integral labyrinth seal
Pipe joint seal
Applicant: Schaeffler Technologies GmbH & Co Kg, Germany A needle roller bearing has been developed with an integral labyrinth seal. According to the patent covering this invention, the sealing element (9) can be assembled from two individual, mutually engaging sealing rings (10, 11) designed to have complementary profile cross-sections. Patent number: WO/2011/042271 Inventors: N. Metten, T. Beck and D. Jauernig Publication date: 14 April 2011
Applicant: Kubota Corp, Japan This patent covers a pipe joint seal for pushin type fittings. The design incorporates a seal portion that has what is referred to as a ‘‘detachment prevention function’’. The outer peripheral surface of the insertion sleeve can be prevented from being damaged by protrusions of a locking portion. The locking portion for preventing detachment is embedded in the main body of the seal portion, which possesses elasticity and can be compressed. Protrusions that engage with the outer peripheral surface of an insertion sleeve – when the insertion sleeve is detached from the receiving sleeve – are formed on the locking portion. A locking ring is rotated if the pipe starts to withdraw and retains the assembly. Patent number: WO/2011/043113 Inventors: K. Kaneko, Keita, T. Ochi and H. Yukuno Publication date: 14 April 2011
Seal device
Patent WO/2011/042271 provides details of a rolling bearing with an integral labyrinth seal.
September 2011
Applicant: NOK Corp, Japan A wide range of seal designs are described by this patent. A common feature is that the sealing action is provided against the radial face of the seal groove when pressurised in one direction, and by radial interference when there is low differential or pressure from the opposite direction. The designs illustrated vary from lip-
type seals to co-axial seals and other less familiar geometries. Patent number: WO/2011/043190 Inventors: H. Tadano, H. Monma and S. Sekine Publication date: 14 April 2011
Coupler with inner seal that prohibits deposits Applicants/Inventors: F.U. Zamaleev, M.F. Gaysin and A.N. Pilugin – Russia This invention relates to couplers, including an inner seal, which are used to connect pipes. According to a first variant, the coupler includes an inner seal made of a polymer that has a low heat-conductivity, and comprises a smooth surface in the form of a coating on its inner wall. This design increases the sealing resistance of a pipe connection and simplifies the process of mounting the connection. No applications or methods of actually joining the pipes are discussed in the English abstract. Patent number: WO/2011/043689 Publication date: 14 April 2011
Low insertion-force sealing device capable of self restraint and joint deflection Applicant: Mueller International Inc, USA This invention is directed at couplings and methods of coupling – particularly bell and spigot couplings for utility pipe lines. According to the inventors, there is a need for a connection that is less sensitive to misalignment and temperature extremes, has reduced frictional resistance to the insertion of the spigot until the desired connection is achieved and the coupling is maintained, yet ensures that a seal under high pressure is retained, even when the joint is deflected. The sealing device described comprises a locking segment that consist of a convex outer surface and a K-type gasket (coupled to the locking segment) or a non-restraining anti-extrusion segment. Patent number: WO/2011/043836 Inventors: W.W. Holmes and W.H. Owen Publication date: 14 April 2011
Sealing Technology
15