- Email: [email protected]
Encapsulated back-up system for use with seal system
PATENTS Rotary joint
Hermetic seal cover
Applicant: Deere & Co, Germany/USA A rotary joint for a tyre inflation unit is disclosed. This design uses brush seals and has the advantage over conventional solutions that no separate pressure control channel
for the pressurization of the seal is required. Patent number: WO 2006/111523 Inventor: J. Sobotzik Publication date: 26 October 2006
Applicant: Tanaka Kikinzoku Kogyo KK, Japan A hermetic seal cover is described be no flow of the brazing material that has a seal cover body and an to the inside of the package during Au-Sn brazing material fused to brazing. the surface of the cover. The cover Patent number: WO 2006/112105 body has a defined surface rough- Inventors: K. Miyazaki and S. Mano ness. When the gold thickness is within a defined range there should Publication date: 26 October 2006
Fluid flow control valve with composition seal Applicant: Fisher Controls International, USA The subject of this patent is a ball valve that is intended for process flow control applications. To provide a longer operating life and compensate for valve or seal wear,
the seal can include an insert to the main seal body. Patent number: WO 2006/112917 Inventor: G.A. Witt Publication date: 26 October 2006
Encapsulated back-up system for use with seal system Applicant: BJ Services Co, USA The rotary joint for a tyre inflator that uses brush seals, from WO 2006/111523.
Flame-retardant metal-coated fabric gasket for electromagnetic-wave shielding Applicants: Seiren Co Ltd and Daikyo Chemical Co Ltd, Japan This patent describes a flameretardant metal-coated fabric which provides electromagnetic wave shielding properties and a high degree of flame retardance without containing a halogen or antimony compounds. The metal-coated fabric has a flameretardant coating film comprising a mixture of a flame retardant
such as ammonium polyphosphate, a flame-retardant aid, for example among melamine, a blowing agent of heat-expandable graphite, a phosphoric ester and a thermoplastic resin having a melting point of 70–130°C. The proportion of the constituents is defined within the patent. Patent number: WO 2006/112539 Inventors: S. Sakagawa et al. Publication date: 26 October 2006
Seal with expandable graphite Applicant: Foseco International Ltd, UK A problem has been found to exist during ladle changes when the seal used with the ladle shroud is based on expandable graphite. Typically, interstitial water present in expandable graphite starts to produce sufficient vapour pressure to initiate graphitic expansion at approximately 200°C. If exposed to temperatures in excess of say 500–700°C over a short period of time, the expansion becomes so rapid that graphite can become detached. This patent describes an intumescent composition con16
January_layout 16
taining expandable graphite from which some, but not all, of the interstitial water present has been removed. The water can be driven off from known expandable graphite by heating it to 230–280°C for approximately 30 minutes. Once the interstitial water has been removed, the expandable graphite is used to produce the intumescent composition, which is then formed into the required seal. Patent number: WO 2006/111696 Inventor: N.E. Rogers Publication date: 26 October 2006
An anti-extrusion assembly that can be used in conjunction with a down-hole expandable packing device is disclosed here. The assembly comprises two slotted metallic rings encapsulated in a non-metallic material. The slotted metallic rings prevent extrusion of the sealing mechanism of the expandable packing device as it is set in a well-bore casing. The
encapsulating non-metallic material protects the metallic rings from damage as the packing device is run into the well-bore. This can help to prevent the problem of the packing setting prematurely as it is run into the well. Patent number: WO 2006/113338 Inventors: H.F. Garrison III and D.J. Lehr Publication date: 26 October 2006
Valve with bi-loading seal Applicant: Kohler Co, USA This patent describes a resilient seal design that is intended to provide an improved resilient seal to act as the static seal for ceramic valve discs in quarterturn domestic taps. It comprises a J-section or hook-section seal
that contains a moulded insert to provide rigidity, and a flexible lip to seal against the back face of the ceramic disc. Patent number: WO 2006/113611 Inventor: C. Shay Publication date: 26 October 2006
75
Example of the improved seal design to prevent leakage of ceramic tap discs when in the closed position, from WO 2006/113611.
Sealing Technology January 2007
03/01/2007 10:07:07
Hermetic seal cover
Applicant: Deere & Co, Germany/USA A rotary joint for a tyre inflation unit is disclosed. This design uses brush seals and has the advantage over conventional solutions that no separate pressure control channel
for the pressurization of the seal is required. Patent number: WO 2006/111523 Inventor: J. Sobotzik Publication date: 26 October 2006
Applicant: Tanaka Kikinzoku Kogyo KK, Japan A hermetic seal cover is described be no flow of the brazing material that has a seal cover body and an to the inside of the package during Au-Sn brazing material fused to brazing. the surface of the cover. The cover Patent number: WO 2006/112105 body has a defined surface rough- Inventors: K. Miyazaki and S. Mano ness. When the gold thickness is within a defined range there should Publication date: 26 October 2006
Fluid flow control valve with composition seal Applicant: Fisher Controls International, USA The subject of this patent is a ball valve that is intended for process flow control applications. To provide a longer operating life and compensate for valve or seal wear,
the seal can include an insert to the main seal body. Patent number: WO 2006/112917 Inventor: G.A. Witt Publication date: 26 October 2006
Encapsulated back-up system for use with seal system Applicant: BJ Services Co, USA The rotary joint for a tyre inflator that uses brush seals, from WO 2006/111523.
Flame-retardant metal-coated fabric gasket for electromagnetic-wave shielding Applicants: Seiren Co Ltd and Daikyo Chemical Co Ltd, Japan This patent describes a flameretardant metal-coated fabric which provides electromagnetic wave shielding properties and a high degree of flame retardance without containing a halogen or antimony compounds. The metal-coated fabric has a flameretardant coating film comprising a mixture of a flame retardant
such as ammonium polyphosphate, a flame-retardant aid, for example among melamine, a blowing agent of heat-expandable graphite, a phosphoric ester and a thermoplastic resin having a melting point of 70–130°C. The proportion of the constituents is defined within the patent. Patent number: WO 2006/112539 Inventors: S. Sakagawa et al. Publication date: 26 October 2006
Seal with expandable graphite Applicant: Foseco International Ltd, UK A problem has been found to exist during ladle changes when the seal used with the ladle shroud is based on expandable graphite. Typically, interstitial water present in expandable graphite starts to produce sufficient vapour pressure to initiate graphitic expansion at approximately 200°C. If exposed to temperatures in excess of say 500–700°C over a short period of time, the expansion becomes so rapid that graphite can become detached. This patent describes an intumescent composition con16
January_layout 16
taining expandable graphite from which some, but not all, of the interstitial water present has been removed. The water can be driven off from known expandable graphite by heating it to 230–280°C for approximately 30 minutes. Once the interstitial water has been removed, the expandable graphite is used to produce the intumescent composition, which is then formed into the required seal. Patent number: WO 2006/111696 Inventor: N.E. Rogers Publication date: 26 October 2006
An anti-extrusion assembly that can be used in conjunction with a down-hole expandable packing device is disclosed here. The assembly comprises two slotted metallic rings encapsulated in a non-metallic material. The slotted metallic rings prevent extrusion of the sealing mechanism of the expandable packing device as it is set in a well-bore casing. The
encapsulating non-metallic material protects the metallic rings from damage as the packing device is run into the well-bore. This can help to prevent the problem of the packing setting prematurely as it is run into the well. Patent number: WO 2006/113338 Inventors: H.F. Garrison III and D.J. Lehr Publication date: 26 October 2006
Valve with bi-loading seal Applicant: Kohler Co, USA This patent describes a resilient seal design that is intended to provide an improved resilient seal to act as the static seal for ceramic valve discs in quarterturn domestic taps. It comprises a J-section or hook-section seal
that contains a moulded insert to provide rigidity, and a flexible lip to seal against the back face of the ceramic disc. Patent number: WO 2006/113611 Inventor: C. Shay Publication date: 26 October 2006
75
Example of the improved seal design to prevent leakage of ceramic tap discs when in the closed position, from WO 2006/113611.
Sealing Technology January 2007
03/01/2007 10:07:07