Patents by Inventor Alfred F. Waterland, III
Alfred F. Waterland, III has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8066843Abstract: The invention relates to a seamless hybrid gasket and the method of making the same. The gasket includes a unitary polymer construction and an insert for enhanced pressure resistance, reduced stress to seal, improved thermal cycling performance and structural support.Type: GrantFiled: October 21, 2008Date of Patent: November 29, 2011Assignee: Virginia Sealing Products, Inc.Inventors: Tyler Hamilton Ragsdale, Robert Adam Riggs, Alfred F. Waterland, III
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Publication number: 20090044904Abstract: The invention relates to a seamless hybrid gasket and the method of making the same. The gasket includes a unitary polymer construction and an insert for enhanced pressure resistance, reduced stress to seal, improved thermal cycling performance and structural support.Type: ApplicationFiled: October 21, 2008Publication date: February 19, 2009Applicant: Virginia Sealing Products, Inc.Inventors: Tyler Hamilton Ragsdale, Robert Adam Riggs, Alfred F. Waterland, III
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Patent number: 7455301Abstract: The invention relates to a seamless hybrid gasket and the method of making the same. The gasket includes a unitary polymer construction and an insert for enhanced pressure resistance, reduced stress to seal, improved thermal cycling performance and structural support.Type: GrantFiled: March 2, 2006Date of Patent: November 25, 2008Assignee: Virginia Sealing Products, Inc.Inventors: Tyler Hamilton Ragsdale, Robert Adam Riggs, Alfred F. Waterland, III
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Patent number: 6824140Abstract: The manway cover has a groove into which a gasket is adapted to be mounted. The groove has an inside diameter. The gasket has an annular metal insert having a top surface and bottom surface, and an inside edge and an outside edge and corresponding inside and outside diameters. A polymer strip is wrapped around and substantially covers the top and bottom surfaces of the metal insert. The polymer strip further has an overlap portion where the polymer strip is folded over and attached to itself, this overlap defining an inside diameter and/or outside diameter of the gasket. The inside diameter of the metal insert is no less than substantially the same as the inside diameter of the manway cover groove. The inside diameter of the gasket is less than the inside diameter of the metal insert.Type: GrantFiled: December 10, 2002Date of Patent: November 30, 2004Inventors: James E. B. Frew, Robert Adam Riggs, Alfred F. Waterland, III
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Patent number: 6682081Abstract: A reduced area gasket has a sealing ring around the inside perimeter of the gasket. Remaining portions of the gasket are removed or compressed so that the bolt load is focused on the sealing area when the flange is tightened. In this way, the lower bolt loads mandated by plastic piping may be met, and the required sealing may be further obtained.Type: GrantFiled: October 30, 2001Date of Patent: January 27, 2004Assignee: Inertech, Inc.Inventors: Brian Douglas Burton, James E. B. Frew, Alfred F. Waterland, III
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Patent number: 5964468Abstract: An improved spiral wound gasket is disclosed that deters and redirects buckling. The invention includes the following: an integral inner ring, a gasket element, outer wraps and a outer guide ring. The integral inner ring is a winding of a thin strip of metal of at least seven revolutions that is overlapped over itself and secured to itself. The gasket element is wound around the integral inner ring and includes a second thin strip of metal and also a thin strip of filler material so as to form alternate layers of the thin strip of metal and filler material. The outer wraps are a winding around the circumference of the gasket element of a thin strip of metal. The invention also discloses a new outer guide ring that has a inside edge that, together with the outside circumferential edge of a spiral wound gasket, defines apertures. These apertures or expansion zones allow filler material to displace radially outwardly rather than radially inwardly to form buckles.Type: GrantFiled: January 14, 1997Date of Patent: October 12, 1999Inventors: Rickey W Chester, David G. Malgee, Paul F. Malgee, Alfred F. Waterland, III
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Patent number: 5551706Abstract: Improved gasket material and method for use in sealing various flanged apparatus, such as found in distillation columns, glass lined vessels and transformer radiator flange seals. The gasket material comprises a cylindrical core of elongated polytetrafluoroethylene (PTFE) contained within a tight wrap of high strength film or films. The gasket material has the exceptional operational properties of PTFE, can be designed for specific situations, and has superior resistance to cold flow or "creep" which distorts most PTFE seals under heavy unconfined compression.Type: GrantFiled: July 29, 1994Date of Patent: September 3, 1996Assignee: W. L. Gore & Associates, Inc.Inventors: Eileen C. Barna, Elizabeth M. Hamilton, Eric W. Lalli, Cindy B. Lubin, Wanda F. Sparks, Alfred F. Waterland, III
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Patent number: 5527047Abstract: A spiral wound gasket having multiple windings of spirally wound strips of metal, fire resistant compressible filler material and oxidizer resistant compressible filler material is disclosed. The fire resistant filler material is arranged in a region toward the outside periphery of the gasket and the oxidizer resistant compressible material is arranged in a region radially closer to the inside periphery of the gasket. The gasket has excellent sealability characteristics from low to high gasket seating stresses, and is effective for use with corrosive chemicals while providing a measure of protection in fire situations.Type: GrantFiled: June 24, 1994Date of Patent: June 18, 1996Assignee: W. L. Gore & Associates, Inc.Inventor: Alfred F. Waterland, III
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Patent number: 5494301Abstract: A composite gasket material composed of a core of elongated polytetrafluoroethylene wrapped with a high strength porous expanded polytetrafluoroethylene film is provided. The composite gasket material exhibits increased resistance to creep while in use so that thickness of the composite gasket material and thus gasket stress is maintained.Type: GrantFiled: April 20, 1993Date of Patent: February 27, 1996Assignee: W. L. Gore & Associates, Inc.Inventors: Elizabeth M. Hamilton, Eric W. Lalli, Cindy B. Lubin, Wanda F. Sparks, Alfred F. Waterland, III
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Patent number: 5492336Abstract: Improved O-ring gasket material and method for use in sealing various apparatus, such as fluid conduits for heat exchange apparatus, is provided. The gasket material comprises a cylindrical core of elongated polytetrafluoroethylene (PTFE) contained within a tight wrap of high strength film. The gasket material has the exceptional operational properties of PTFE, while being resistant to cold flow or "creep" which distorts most PTFE seals under heavy unconfined compression.Type: GrantFiled: January 19, 1994Date of Patent: February 20, 1996Assignee: W. L. Gore & Associates, Inc.Inventors: Eileen C. Barna, Elizabeth M. Hamilton, Eric W. Lalli, Cindy B. Lubin, Wanda F. Sparks, Alfred F. Waterland, III
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Patent number: 5486010Abstract: Improved material and method for use in sealing plate and frame apparatus, such as a plate and frame heat exchanger, are provided. The gasket material comprises a core of elongated polytetrafluoroethylene (PTFE) contained within a tight wrap of high strength film. The gasket material has the exceptional operational properties of PTFE, while being resistant to cold flow or "creep" which distorts most PTFE seals under heavy unconfined compression. The preferred material is pre-compressed to aid in installation.Type: GrantFiled: September 8, 1993Date of Patent: January 23, 1996Assignee: W. L. Gore & Associates, Inc.Inventors: Elizabeth M. Hamilton, Eric W. Lalli, Cindy B. Lubin, Wanda F. Sparks, Alfred F. Waterland, III
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Patent number: 5112664Abstract: A shielded gasket assembly is provided for use in corrosive environments having a synthetic rubber gasket as a core and a shielding material of expanded high density polytetrafluoroethylene with an adhesive on at least one surface of the sheilding material at least partially enveloping the surface of the core gasket.Type: GrantFiled: November 30, 1990Date of Patent: May 12, 1992Assignee: W. L. Gore & Associates, Inc.Inventor: Alfred F. Waterland, III
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Patent number: 4823229Abstract: This invention relates to a seal for an aircraft canopy having a compressible, resilient core and is encapsulated by a low-density, electrically conductive polymeric tape and to a method for making the seal.Type: GrantFiled: August 13, 1987Date of Patent: April 18, 1989Inventor: Alfred F. Waterland III