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Gasket sealing of screwed connections in pipes and applicator device
PATENTS
Gasket sealing of screwed connections in pipes and applicator device Applicant: Filflex SL, Spain This invention describes a gasket and applicator system that is suitable for plastic screw threads. A wire with a polymer core is coated with a cross-linked silicone rubber composition and, optionally, a lubricating compound. The invention is said to offer the following
advantages: the sealing system does not contaminate the fluids in the pipes; it does not produce stains on application; and the system does not require end-clamping. Patent number: WO 2005/007548 Inventor: J. Nieto Mocholi Publication date: 27 January 2005
Non-flexing seal for torque-transmitting/CV joints Applicant/Inventor: P.J. Mazziotti (USA) It is an object of this invention to provide a non-flexing, longer
Cross-section of the sealed joint cover intended to replace the bellows used to protect CV joints, from WO 2005/008090.
lasting seal for torque transmitting joints, such as CV joints, to replace the flexible boot that is typically used at present. Upwards of 90% of CV joint failures are attributable to failure of flexible boot seals and the consequent loss of lubricant. Here a seal is provided on the outer surface of the outer race of the joint. It is connected by a nonflexible seal housing to a second seal that engages with a drive shaft. The inner seal can slide on the drive shaft. Patent number: WO 2005/008090 Publication date: 27 January 2005
Rebuildable composite flange seal to avoid distortion Applicant: Garlock Sealing Technologies, USA This patent describes a flange seal assembly that is particularly intended for use with lowstrength metal flanges such as cast iron, copper or aluminum, and low-grade bolts where it is not feasible to provide the compressive stress necessary for conventional gasket materials to operate at medium to high system pressures. It claims to avoid distortion of the flanges, distortion of the gasket during fitting, and displacement due to the action of pressure. The seal assembly comprises an annular retainer to match the flanges that has an annular groove on each side. A replaceable seal element, typically fluoroelastomer, is located in the groove with adhesive. The groove has a similar volume to the elastomer insert. Patent number: WO 2005/001315 Inventor: M. Tones Publication date: 6 January 2005
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Hydrodynamic brush seal tilted to promote film formation Applicant/Inventor: J.F. Justak (USA) This patent is concerned with a brush seal which has hydrodynamic shoes between the bristles and the shaft. Pairs of axially spaced bristle bundles (18) are mounted in the machine housing. The lower ends of some bristles are connected to a shoe (34). As the shaft (14) rotates a hydrodynamic film is created between the shoe and the shaft. Each of the shoes is connected at discrete points to the end of the seal bristles such that the leading edge of the shoe is oriented to have less contact with the rotor than the trailing edge of the shoe. In operation, the shoes function very similarly to a tilting pad bearing shoe. Prior to rotation of the rotor, the shoe is in contact with the rotor surface. Because the leading edge of the shoe has less contact with the rotor or stator than its trailing edge, when the rotor begins to rotate a hydrodynamic wedge is created which lifts the shoe slightly off the surface of the rotor. Consequently,
the shoe floats over the rotor at a design gap, such as 0.00125 to 0.0025 mm. Patent number: WO 2005/001316 Publication date: 6 January 2005
The hydrodynamic brush seal with hydrodynamic shoe (34) described in WO 2005/001316, which is tilted to promote formation of the film.
Watertight joint with coating pre-applied to metal sheet Applicant: Bluescope Steel Ltd, Australia This invention has application to articles that contain or carry water, or other fluids, manufactured from metal sheet. A coating is pre-applied to the metal sheet prior to formation of the lock
seam joint. This provides a watertight joint without further treatment. Patent number: WO 2005/005753 Inventor: N.E. Wallace Publication date: 20 January 2005
Cold rolled steel sheet for gasket material Applicant: Toyo Kohan Co Ltd, Japan This patent describes a cold rolled sheet steel material that is said to exhibit excellent sealing performance, and can be produced at reduced cost. It has a chemical composition that includes C (0.03– 0.35 wt%), Si (0.2–3.0 wt%), Mn (0.5–3.0 wt%), P (≤0.06 wt%), S (≤0.06 wt%), Al (≤0.1 wt%), N (0.0010–0.0150 wt%), Cu (1.5– 2.0 wt%), Ni (≤1.2 wt%), and the
balance Fe and inevitable impurities. It may also include one or more of Nb (0.001–0.1 wt%), Ti (0.001–0.1 wt%) and B (0.0005– 0.01 wt%). A method for producing the cold-rolled steel sheet is also described here. Patent number: WO 2005/007916 Inventors: T. Ueda, Y. Tahara and M. Komai Publication date: 27 January 2005
Aerosol dispenser valve seal based on EP and/or EPDM Applicant: Valois SAS, France
The composite flange seal described in WO 2005/001315, showing the elastomer sealing inserts.
This invention relates to a valve seal for an aerosol dispenser. The seal contains an elastomer based on ethylene propylene (EP) and/or ethylene propylene diene (EPDM), and contains a mineral filler based on
quartz (SiO2) and on kaolinite (Al4[(OH)8Si4O10]). Patent number: WO 2005/003251 Inventors: S. Barranco and F. Pardon Publication date: 13 January 2005
Sealing Technology April 2005
Gasket sealing of screwed connections in pipes and applicator device Applicant: Filflex SL, Spain This invention describes a gasket and applicator system that is suitable for plastic screw threads. A wire with a polymer core is coated with a cross-linked silicone rubber composition and, optionally, a lubricating compound. The invention is said to offer the following
advantages: the sealing system does not contaminate the fluids in the pipes; it does not produce stains on application; and the system does not require end-clamping. Patent number: WO 2005/007548 Inventor: J. Nieto Mocholi Publication date: 27 January 2005
Non-flexing seal for torque-transmitting/CV joints Applicant/Inventor: P.J. Mazziotti (USA) It is an object of this invention to provide a non-flexing, longer
Cross-section of the sealed joint cover intended to replace the bellows used to protect CV joints, from WO 2005/008090.
lasting seal for torque transmitting joints, such as CV joints, to replace the flexible boot that is typically used at present. Upwards of 90% of CV joint failures are attributable to failure of flexible boot seals and the consequent loss of lubricant. Here a seal is provided on the outer surface of the outer race of the joint. It is connected by a nonflexible seal housing to a second seal that engages with a drive shaft. The inner seal can slide on the drive shaft. Patent number: WO 2005/008090 Publication date: 27 January 2005
Rebuildable composite flange seal to avoid distortion Applicant: Garlock Sealing Technologies, USA This patent describes a flange seal assembly that is particularly intended for use with lowstrength metal flanges such as cast iron, copper or aluminum, and low-grade bolts where it is not feasible to provide the compressive stress necessary for conventional gasket materials to operate at medium to high system pressures. It claims to avoid distortion of the flanges, distortion of the gasket during fitting, and displacement due to the action of pressure. The seal assembly comprises an annular retainer to match the flanges that has an annular groove on each side. A replaceable seal element, typically fluoroelastomer, is located in the groove with adhesive. The groove has a similar volume to the elastomer insert. Patent number: WO 2005/001315 Inventor: M. Tones Publication date: 6 January 2005
14
Hydrodynamic brush seal tilted to promote film formation Applicant/Inventor: J.F. Justak (USA) This patent is concerned with a brush seal which has hydrodynamic shoes between the bristles and the shaft. Pairs of axially spaced bristle bundles (18) are mounted in the machine housing. The lower ends of some bristles are connected to a shoe (34). As the shaft (14) rotates a hydrodynamic film is created between the shoe and the shaft. Each of the shoes is connected at discrete points to the end of the seal bristles such that the leading edge of the shoe is oriented to have less contact with the rotor than the trailing edge of the shoe. In operation, the shoes function very similarly to a tilting pad bearing shoe. Prior to rotation of the rotor, the shoe is in contact with the rotor surface. Because the leading edge of the shoe has less contact with the rotor or stator than its trailing edge, when the rotor begins to rotate a hydrodynamic wedge is created which lifts the shoe slightly off the surface of the rotor. Consequently,
the shoe floats over the rotor at a design gap, such as 0.00125 to 0.0025 mm. Patent number: WO 2005/001316 Publication date: 6 January 2005
The hydrodynamic brush seal with hydrodynamic shoe (34) described in WO 2005/001316, which is tilted to promote formation of the film.
Watertight joint with coating pre-applied to metal sheet Applicant: Bluescope Steel Ltd, Australia This invention has application to articles that contain or carry water, or other fluids, manufactured from metal sheet. A coating is pre-applied to the metal sheet prior to formation of the lock
seam joint. This provides a watertight joint without further treatment. Patent number: WO 2005/005753 Inventor: N.E. Wallace Publication date: 20 January 2005
Cold rolled steel sheet for gasket material Applicant: Toyo Kohan Co Ltd, Japan This patent describes a cold rolled sheet steel material that is said to exhibit excellent sealing performance, and can be produced at reduced cost. It has a chemical composition that includes C (0.03– 0.35 wt%), Si (0.2–3.0 wt%), Mn (0.5–3.0 wt%), P (≤0.06 wt%), S (≤0.06 wt%), Al (≤0.1 wt%), N (0.0010–0.0150 wt%), Cu (1.5– 2.0 wt%), Ni (≤1.2 wt%), and the
balance Fe and inevitable impurities. It may also include one or more of Nb (0.001–0.1 wt%), Ti (0.001–0.1 wt%) and B (0.0005– 0.01 wt%). A method for producing the cold-rolled steel sheet is also described here. Patent number: WO 2005/007916 Inventors: T. Ueda, Y. Tahara and M. Komai Publication date: 27 January 2005
Aerosol dispenser valve seal based on EP and/or EPDM Applicant: Valois SAS, France
The composite flange seal described in WO 2005/001315, showing the elastomer sealing inserts.
This invention relates to a valve seal for an aerosol dispenser. The seal contains an elastomer based on ethylene propylene (EP) and/or ethylene propylene diene (EPDM), and contains a mineral filler based on
quartz (SiO2) and on kaolinite (Al4[(OH)8Si4O10]). Patent number: WO 2005/003251 Inventors: S. Barranco and F. Pardon Publication date: 13 January 2005
Sealing Technology April 2005