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Metal to metal seal for downhole tools
PATENTS milling coal products there is the potential for explosions within the mill. To contain this overpressure the proposed design uses one or more piston rings as rotary shaft seals. A peg is located at the butt joint to prevent rotation of the ring. Publication number: WO/2008/087043 Inventor: A. Wesling Publication date: 24 July 2008
Pump or valve seal Applicant: Valois SAS, France The patent describes the formulation of seal materials for the pump and valve of aerosol dispensers. It discuses swell to maintain sealing, loss of material properties plus friction concerns for the pump. The formulations all include at least one alkaline mineral filler, the pH of which is greater than or equal to 8. A number of potential fillers and elastomer types are included. Publication number: WO/2008/087352 Inventor: P. Leone Publication date: 24 July 2008
Shaft seal device Applicant: Eagle Industry Co Ltd, Japan This patent describes a shaft seal arrangement which can be assembled simply and precisely. An end-face lip seal (104), has a protruding lip (105) has its root portion has a diameter (D1) larger than the internal diameter (D2) of a fitting portion (106) fitting a shaft (102). As a result, an external force (F1’) to act from the side of a back end face (104b) toward the protruding lip (105) can be balanced with an external force (F1) to act from the side of the protruding lip (105) toward the back end face (104b). Thus the end-face lip seal (104) is not moved in the axial direction but held at the assembled position. As a result, the end-face lip seal (104) can be assembled with reference to a reference face (101b) of the same housing (101) as that of a fixing ring (103), so that the fixing
The end face lip seal positioning arrangement described in WO/2008/088041.
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Sealing Technology
ring (103) and the end-face lip seal (104) can be relatively positioned precisely. Publication number: WO/2008/088041 Inventors: Y. Takigahira Publication date: 24 July 2008
Permanent seal ring for a nuclear reactor cavity
Applicant: E Ink Corporation, USA Various types of edge seals for protecting electro-optic displays against environmental contaminants are described. In one type of seal the electro-optic layer is sandwiched between a backplane and a protective sheet and a sealing material extends between them. In other seals, the protective sheet is secured to the backplane or to a second protective adjacent sheet. Publication number: WO/2008/088315 Inventors: G.M. Danner et al. Publication date: 24 July 2008
Applicant: Westinghouse Electric Co LLC, USA A permanent cavity seal ring that replaces the function of the temporary cavity seal ring typically used in narrow thermal expansion gap pressurized water reactors, to seal the gap between the reactor cavity well and the reactor during re-fuelling. The permanent seal ring uses a C-shaped flexure that is shielded by a rigid cantilevered support arm from any equipment accidentally dropped from above in the re-fuelling canal. The construction accommodates the thermal expansion of the reactor vessel while permitting the reactor cavity cooling air to exit the annulus between the vessel and the reactor cavity wall during plant operation, without a significant increase in pressure drop. Publication number: WO/2008/088930 Inventor: A.W. Harkness Publication date: 24 July 2008
Metal to metal seal for downhole tools
Unitized seal assembly having soft retention and debris expulsion features
Applicant: Welldynamics Inc, USA This patent relates to what is described as a metal to metal seal for downhole tools. It includes a non-metal, elastomer, component that may be used to bias the metal seal in a radial direction in response to a pressure differential. Several basic geometries are illustrated. Publication number: WO/2008/088553 Inventor: A. Curington Publication date: 24 July 2008 Editor’s comment: Those skilled in the art, as it says in many patents, may notice that the elastomer potentially does more than just energise the metal.
Applicant: Federal-Mogul Corporation, USA A seal assembly is disclosed in which the wear sleeve component is unitized with the outer seal component by means of an elastomeric retention lip carried on the sealing component. The retention lip overlaps the end of a radially outwardly extending flange of the wear sleeve and is arranged axially opposite the dynamic seal lip of the seal component. The overlapping retention lip extends slightly radially inward of the edge of the flange and deforms elastically when the wear sleeve is
Electro-optic display with edge seal
An example of what is described as a metal to metal seal in WO/2008/088553.
One of the seal arrangements described in WO/2008/088942. The radial flange of elastomer, 140, deflects to allow assembly of the cassette and then retains the sleeve.
December 2008
Pump or valve seal Applicant: Valois SAS, France The patent describes the formulation of seal materials for the pump and valve of aerosol dispensers. It discuses swell to maintain sealing, loss of material properties plus friction concerns for the pump. The formulations all include at least one alkaline mineral filler, the pH of which is greater than or equal to 8. A number of potential fillers and elastomer types are included. Publication number: WO/2008/087352 Inventor: P. Leone Publication date: 24 July 2008
Shaft seal device Applicant: Eagle Industry Co Ltd, Japan This patent describes a shaft seal arrangement which can be assembled simply and precisely. An end-face lip seal (104), has a protruding lip (105) has its root portion has a diameter (D1) larger than the internal diameter (D2) of a fitting portion (106) fitting a shaft (102). As a result, an external force (F1’) to act from the side of a back end face (104b) toward the protruding lip (105) can be balanced with an external force (F1) to act from the side of the protruding lip (105) toward the back end face (104b). Thus the end-face lip seal (104) is not moved in the axial direction but held at the assembled position. As a result, the end-face lip seal (104) can be assembled with reference to a reference face (101b) of the same housing (101) as that of a fixing ring (103), so that the fixing
The end face lip seal positioning arrangement described in WO/2008/088041.
12
Sealing Technology
ring (103) and the end-face lip seal (104) can be relatively positioned precisely. Publication number: WO/2008/088041 Inventors: Y. Takigahira Publication date: 24 July 2008
Permanent seal ring for a nuclear reactor cavity
Applicant: E Ink Corporation, USA Various types of edge seals for protecting electro-optic displays against environmental contaminants are described. In one type of seal the electro-optic layer is sandwiched between a backplane and a protective sheet and a sealing material extends between them. In other seals, the protective sheet is secured to the backplane or to a second protective adjacent sheet. Publication number: WO/2008/088315 Inventors: G.M. Danner et al. Publication date: 24 July 2008
Applicant: Westinghouse Electric Co LLC, USA A permanent cavity seal ring that replaces the function of the temporary cavity seal ring typically used in narrow thermal expansion gap pressurized water reactors, to seal the gap between the reactor cavity well and the reactor during re-fuelling. The permanent seal ring uses a C-shaped flexure that is shielded by a rigid cantilevered support arm from any equipment accidentally dropped from above in the re-fuelling canal. The construction accommodates the thermal expansion of the reactor vessel while permitting the reactor cavity cooling air to exit the annulus between the vessel and the reactor cavity wall during plant operation, without a significant increase in pressure drop. Publication number: WO/2008/088930 Inventor: A.W. Harkness Publication date: 24 July 2008
Metal to metal seal for downhole tools
Unitized seal assembly having soft retention and debris expulsion features
Applicant: Welldynamics Inc, USA This patent relates to what is described as a metal to metal seal for downhole tools. It includes a non-metal, elastomer, component that may be used to bias the metal seal in a radial direction in response to a pressure differential. Several basic geometries are illustrated. Publication number: WO/2008/088553 Inventor: A. Curington Publication date: 24 July 2008 Editor’s comment: Those skilled in the art, as it says in many patents, may notice that the elastomer potentially does more than just energise the metal.
Applicant: Federal-Mogul Corporation, USA A seal assembly is disclosed in which the wear sleeve component is unitized with the outer seal component by means of an elastomeric retention lip carried on the sealing component. The retention lip overlaps the end of a radially outwardly extending flange of the wear sleeve and is arranged axially opposite the dynamic seal lip of the seal component. The overlapping retention lip extends slightly radially inward of the edge of the flange and deforms elastically when the wear sleeve is
Electro-optic display with edge seal
An example of what is described as a metal to metal seal in WO/2008/088553.
One of the seal arrangements described in WO/2008/088942. The radial flange of elastomer, 140, deflects to allow assembly of the cassette and then retains the sleeve.
December 2008