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Bulb seal for a door
PATENTS
PATENTS A schematic view of the downhole annular barrier that is detailed by patent WO/2013/144181.
Bearing with compact static outer diameter seal Applicant: Schaeffler Technologies Ag & Co Kg, Germany This invention relates generally to a bearing, but more specifically to a bearing which has a seal with an over-moulded rubber portion that extends radially outwards to create a static connection with a bearing cup, during pressfitting of the seal into the bearing cup. Both the cup and seal have a substantially similar taper such that when the seal is pressed-in, the over-moulded portion of the seal compresses and creates an increased interference as the seal is seated. This is similar to a ‘‘corking’’ action. In this way, the design provides effective static sealing through the use of known manufacturing techniques, without the use of adhesives or secondary operations. The static seal that is created prevents debris/liquid ingress in the press-fit region. It also does not allow the debris/liquid to ‘‘wick’’ past the press-fit region. Moreover, the seal is not dependent upon flanging. This design allows for minimal package size variation and the ability to accommodate small cross-sections where is not possible to use the packaging of existing technologies. Patent number: WO/2013/142193 Inventors: J. Tate, S. Carr and C. Goddard Publication date: 26 September 2013
Radial shaft seal with static and hydrodynamic features Applicant: Federal-Mogul Corp, USA This invention relates generally to dynamic oil seals of the type that create a fluid-tight barrier between a rotating shaft and housing. In accordance with this patent, a preferred aspect of this design relates to a radial shaft seal that is configured to be received by a housing and set about a shaft to isolate the air-side of the shaft seal from the oil-side of the shaft seal. The seal described includes an annular mounting portion; an elastomeric body connected to the mounting portion; and a seal lip connected to the seal body. The lip has an annular inner sealing surface extending axially between the oil-side end and the free air-side end. The inner sealing surface has a first groove region and an annular static band. The region is spaced axially from the static band – extending between the static band and the oil-side end towards the oil-side of the seal. In accordance with another aspect of this invention, a second groove region extends along the inner sealing surface from the 14
Sealing Technology
static band towards the air-side of the seal in order to direct lubrication back towards the oil-side of the seal. Patent number: WO/2013/142665 Inventors: B.R. Sedlar and D.M. Toth Publication date: 26 September 2013
Annular barrier with a seal Applicant: Welltec A/s, Denmark This invention relates to a downhole annular barrier (1) with an axial extension that has an outer surface facing the inner surface of an outer structure (2). The barrier comprises a tubular part (5), an expandable part (3) and at least one annular sealing element (41). The latter is connected to the expandable part (3) and its length (along the axial extension of the annular barrier) is less than 50% of the length of the downhole annular barrier. The annular sealing element includes a spring (43). In addition, this patent provides details of a downhole system that makes use of the seal described. Patent number: WO/2013/144181 Inventors: J. Hallundbæk and L. Stæhr Publication date: 3 October 2013
Bulb seal for a door Applicant: Rite-Hite Holding Corp, USA This patent applies to a seal that is attached to the edge member of a door panel. The seal discussed includes a flexible sheet of material, with its longitudinal edges turned inwards (towards a more central portion of the sheet) such that the sheet is turned partially or somewhat inside-out to provide a bulging geometry that is favourable for sealing in multiple directions. The seal, for example, is suitable for sealing in a head-on direction, engaging an abutting surface, such as a doorjamb. It also can seal in sliding engagement with an adjacent surface parallel to the door panel. In some examples, the sheet defines a hollow chamber in which its longitudinal edges reinforce or brace an exterior curved portion of the seal. In other examples, the sheet of material is described as having a unitary seamless structure with an attached touch-and-hold fastener that makes the seal readily replaceable.
Patent number: WO/2013/148563 Inventor: D.J. Hoffmann Publication date: 3 October 2013
Pipe joint Applicant: Aquaspira Ltd, UK This invention relates to a pipe joint; apparatus for sealing and testing the joint; a pipe comprising first and second sections joined together by means of such a joint; and to a method of sealing a joint between two pipe sections. In one embodiment, a pipe joint between first and second pipe sections comprises a female component and at least one male component. The sections are joined together by locating the male component within the female component. First and second seals are provided on the male or female components. These seals are arranged to provide an interference fit and are axially spaced apart so that an annular area is defined between the first and second seals, and the walls of the male and female components. The joint further comprises an arrangement for communicating with the annular area, so that pressure can be applied to fluid contained within this area. The pressure of the fluid in the annular area is measured. This enables a drop in pressure to be detected. Any reduction would be indicative of a leak path existing past at least one of the seals. Patent number: WO/2013/144593 Inventors: R.M. Stanway, N.R.D. Wallace and C.J.R. Northern Publication date: 3 October 2013
Dynamic seal for a rotating shaft in a submersible motor Applicant: Wujiang Tianlong Electronic Machinery Equipment Co Ltd, China A rotating-shaft dynamic-seal structure for a submersible motor forms the subject of this patent. It comprises a seal end-cover; a framework oil seal, fixed to the seal end-cover; and a fan blade ring, sleeved on the motor’s rotating shaft. A gap is reserved between the framework oil seal and the fan blade ring. This gap becomes a high-pressure draft cavity when the fan blade ring rotates with the rotating shaft. The ‘‘shrink
February 2014
PATENTS A schematic view of the downhole annular barrier that is detailed by patent WO/2013/144181.
Bearing with compact static outer diameter seal Applicant: Schaeffler Technologies Ag & Co Kg, Germany This invention relates generally to a bearing, but more specifically to a bearing which has a seal with an over-moulded rubber portion that extends radially outwards to create a static connection with a bearing cup, during pressfitting of the seal into the bearing cup. Both the cup and seal have a substantially similar taper such that when the seal is pressed-in, the over-moulded portion of the seal compresses and creates an increased interference as the seal is seated. This is similar to a ‘‘corking’’ action. In this way, the design provides effective static sealing through the use of known manufacturing techniques, without the use of adhesives or secondary operations. The static seal that is created prevents debris/liquid ingress in the press-fit region. It also does not allow the debris/liquid to ‘‘wick’’ past the press-fit region. Moreover, the seal is not dependent upon flanging. This design allows for minimal package size variation and the ability to accommodate small cross-sections where is not possible to use the packaging of existing technologies. Patent number: WO/2013/142193 Inventors: J. Tate, S. Carr and C. Goddard Publication date: 26 September 2013
Radial shaft seal with static and hydrodynamic features Applicant: Federal-Mogul Corp, USA This invention relates generally to dynamic oil seals of the type that create a fluid-tight barrier between a rotating shaft and housing. In accordance with this patent, a preferred aspect of this design relates to a radial shaft seal that is configured to be received by a housing and set about a shaft to isolate the air-side of the shaft seal from the oil-side of the shaft seal. The seal described includes an annular mounting portion; an elastomeric body connected to the mounting portion; and a seal lip connected to the seal body. The lip has an annular inner sealing surface extending axially between the oil-side end and the free air-side end. The inner sealing surface has a first groove region and an annular static band. The region is spaced axially from the static band – extending between the static band and the oil-side end towards the oil-side of the seal. In accordance with another aspect of this invention, a second groove region extends along the inner sealing surface from the 14
Sealing Technology
static band towards the air-side of the seal in order to direct lubrication back towards the oil-side of the seal. Patent number: WO/2013/142665 Inventors: B.R. Sedlar and D.M. Toth Publication date: 26 September 2013
Annular barrier with a seal Applicant: Welltec A/s, Denmark This invention relates to a downhole annular barrier (1) with an axial extension that has an outer surface facing the inner surface of an outer structure (2). The barrier comprises a tubular part (5), an expandable part (3) and at least one annular sealing element (41). The latter is connected to the expandable part (3) and its length (along the axial extension of the annular barrier) is less than 50% of the length of the downhole annular barrier. The annular sealing element includes a spring (43). In addition, this patent provides details of a downhole system that makes use of the seal described. Patent number: WO/2013/144181 Inventors: J. Hallundbæk and L. Stæhr Publication date: 3 October 2013
Bulb seal for a door Applicant: Rite-Hite Holding Corp, USA This patent applies to a seal that is attached to the edge member of a door panel. The seal discussed includes a flexible sheet of material, with its longitudinal edges turned inwards (towards a more central portion of the sheet) such that the sheet is turned partially or somewhat inside-out to provide a bulging geometry that is favourable for sealing in multiple directions. The seal, for example, is suitable for sealing in a head-on direction, engaging an abutting surface, such as a doorjamb. It also can seal in sliding engagement with an adjacent surface parallel to the door panel. In some examples, the sheet defines a hollow chamber in which its longitudinal edges reinforce or brace an exterior curved portion of the seal. In other examples, the sheet of material is described as having a unitary seamless structure with an attached touch-and-hold fastener that makes the seal readily replaceable.
Patent number: WO/2013/148563 Inventor: D.J. Hoffmann Publication date: 3 October 2013
Pipe joint Applicant: Aquaspira Ltd, UK This invention relates to a pipe joint; apparatus for sealing and testing the joint; a pipe comprising first and second sections joined together by means of such a joint; and to a method of sealing a joint between two pipe sections. In one embodiment, a pipe joint between first and second pipe sections comprises a female component and at least one male component. The sections are joined together by locating the male component within the female component. First and second seals are provided on the male or female components. These seals are arranged to provide an interference fit and are axially spaced apart so that an annular area is defined between the first and second seals, and the walls of the male and female components. The joint further comprises an arrangement for communicating with the annular area, so that pressure can be applied to fluid contained within this area. The pressure of the fluid in the annular area is measured. This enables a drop in pressure to be detected. Any reduction would be indicative of a leak path existing past at least one of the seals. Patent number: WO/2013/144593 Inventors: R.M. Stanway, N.R.D. Wallace and C.J.R. Northern Publication date: 3 October 2013
Dynamic seal for a rotating shaft in a submersible motor Applicant: Wujiang Tianlong Electronic Machinery Equipment Co Ltd, China A rotating-shaft dynamic-seal structure for a submersible motor forms the subject of this patent. It comprises a seal end-cover; a framework oil seal, fixed to the seal end-cover; and a fan blade ring, sleeved on the motor’s rotating shaft. A gap is reserved between the framework oil seal and the fan blade ring. This gap becomes a high-pressure draft cavity when the fan blade ring rotates with the rotating shaft. The ‘‘shrink
February 2014