Patents Assigned to James Walker Co., Ltd.
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Patent number: 9261195Abstract: A seal assembly (1) described comprises an elastomeric component (10) having a sealing surface (25) for providing a sealing function, and an energizing band (30), the elastomeric component (10) including an aperture for the energizing band, wherein the energizing band is adapted to fit in the aperture of the elastomeric component (10). In use, an outer surface of the energizing band applies a force to the elastomeric component (10), to deform the (10) elastomeric component to form a seal at the sealing surface. The energizing band (30) component includes non-metallic material.Type: GrantFiled: September 24, 2009Date of Patent: February 16, 2016Assignee: James Walker & Co. Ltd.Inventor: John Toynbee
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Patent number: 8998174Abstract: A diaphragm (20) for a diaphragm valve is described. The diaphragm (20) has a body (22) comprising a first elastomer and a resistant layer (24) comprising a second elastomer having a different composition or formulation. Diaphragms described in examples have good flexibility with a high level of chemical resistance and low surface adhesion. A fixing attachment for fixing the diaphragm in the valve is also described.Type: GrantFiled: May 19, 2009Date of Patent: April 7, 2015Assignee: James Walker & Co. Ltd.Inventors: Peter John Warren, Stephen Winterbottom
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Publication number: 20140042707Abstract: A sealing element of a hydrodynamic seal for relatively rotating elements, having a sealing surface (26) and consisting of or comprising at least one stabilising ply (58) of fabric impregnated with or disposed n a binder material which prevents relative movement of fibres of the fabric during use of the seal.Type: ApplicationFiled: October 21, 2013Publication date: February 13, 2014Applicant: James Walker & Co. Ltd.Inventors: Peter John Warren, Godfrey Duncan Elliott
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Publication number: 20110227291Abstract: A seal assembly (1) described comprises an elastomeric component (10) having a sealing surface (25) for providing a sealing function, and an energising band (30), the elastomeric component (10) including an aperture for the energising band, wherein the energising band is adapted to fit in the aperture of the elastomeric component (10). In use, an outer surface of the energising band applies a force to the elastomeric component (10), to deform the (10) elastomeric component to form a seal at the sealing surface. The energising band (30) component includes non-metallic material.Type: ApplicationFiled: September 24, 2009Publication date: September 22, 2011Applicant: JAMES WALKER & CO. LTD.Inventor: John Toynbee
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Publication number: 20110210521Abstract: A seal is described which has good low temperature flexibility and includes a core (3) comprising an elastomer, and an outer layer (7) on the core comprising an elastomer. In some examples described, the Tg of the core is greater than the Tg of the outer layer. Seals described have high chemical resistance as well as good resistance to explosive decompression.Type: ApplicationFiled: July 16, 2009Publication date: September 1, 2011Applicant: JAMES WALKER & CO. LTD.Inventors: Peter John Warren, Stephen Winterbottom
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Publication number: 20110114868Abstract: A diaphragm (20) for a diaphragm valve is described. The diaphragm (20) has a body (22) comprising a first elastomer and a resistant layer (24) comprising a second elastomer having a different composition or formulation. Diaphragms described in examples have good flexibility with a high level of chemical resistance and low surface adhesion. A fixing attachment for fixing the diaphragm in the valve is also described.Type: ApplicationFiled: May 19, 2009Publication date: May 19, 2011Applicant: JAMES WALKER & CO. LTD.Inventors: Peter John Warren, Stephen Winterbottom
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Publication number: 20100244387Abstract: A sealing element of a hydrodynamic seal for relatively rotating elements, having a sealing surface (26) and consisting of or comprising at least one stabilising ply (58) of fabric impregnated with or disposed in a binder material which prevents relative movement of fibres of the fabric during use of the seal.Type: ApplicationFiled: April 30, 2008Publication date: September 30, 2010Applicant: JAMES WALKER & CO. LTD.Inventors: Peter John Warren, Godfrey Duncan Elliott
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Publication number: 20080069992Abstract: A method of manufacturing a submergible machine protector bag comprising providing a tubular woven sleeve of reinforcing material, fitting the sleeve over a mandrel, embedding the sleeve in a waterproof elastomeric material to form a bag body and removing the bag body from the mandrel.Type: ApplicationFiled: September 14, 2007Publication date: March 20, 2008Applicant: JAMES WALKER & CO. LTD.Inventors: Peter Warren, John Rogers
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Patent number: 6357540Abstract: A roller-cone drill bit in which a double lip seal, made of a self-lubricating elastomer, protects the bearings from the mud.Type: GrantFiled: June 7, 1999Date of Patent: March 19, 2002Assignees: Halliburton Energy Services, Inc., James Walker Co., Ltd.Inventors: Nigel M. Page, Philip D. Embury