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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 5433370 | Multi-ply sealing rings and methods for manufacturing same A multi-ply sealing ring and method of manufacturing same. Two annular members are nested one within the other and then welded together at equi-distant intervals to form a plurality of annular weld zones. The two annular members are then cut along the wel... | 07/18/1995 |
| 5249814 | Multi-ply sealing rings and methods for manufacturing same A multi-ply sealing ring and method of manufacturing same. Two annular members are nested one within the other and then welded together at equi-distant intervals to form a plurality of annular weld zones. The two annular members are then cut along the wel... | 10/05/1993 |
| 5158305 | Pressure-energized two-element seal A sealing ring including first and second annular elements, each being substantially J-shaped in cross section. Each element includes a leg portion and an arcuate portion, the arcuate portion of the first and second annular elements being coaxially interf... | 10/27/1992 |
| 4919453 | Low profile V-coupling A device for coupling the peripheral flanges of a pair of pipes comprising a pair of retaining members, each having a V-shaped groove for receiving a portion of the peripheral flanges of the pipes. The retaining members are pivotally coupled at one of the... | 04/24/1990 |
| 4854600 | Pressure balanced metallic S-seal A pressure balance sealing ring having a substantially S-shaped, resilient cross section including two oppositely facing convolutions, a central leg coupling the convolutions and a pair of outer legs, each extending from one of the convolutions. The ring ... | 08/08/1989 |
| 4779901 | Sealed rigid pipe joint A joint for rigidly coupling first and second pipes having high temperature fluid flowing therethrough. The joint comprises first and second annular members including mating spherical segments which are rigidly coupled, respectively, to the pipes; a coupl... | 10/25/1988 |
| 4759555 | Split ring seal with slip joint A split ring seal assembly including a split ring seal having a first and a second free end and a connecting member in the shape of a ring segment having first and second ends. The split ring seal and the connecting element have mating E-shaped transverse... | 07/26/1988 |
| 4681353 | V-coupling for installation in narrow annular spaces A V-coupling device for coupling coaxial annular flanges comprising at least two arcuate coupling members, a pivoting mechanism for pivotally and releasably coupling the coupling members at their first ends, and a tightening mechanism which includes an ax... | 07/21/1987 |
| 4643463 | Gimbal joint for piping systems A flexible gimbal joint for pipes including an internal flexible seal interconnecting the pipes and an external gimbal ring which also provides secondary sealing. The joint includes spherical portions with mating sinusoidal free edges, the external ring a... | 02/17/1987 |
| 4589666 | Slip joint assembly for a split ring seal A split ring seal assembly with a slip joint including a split ring having first and second free ends and a connecting member in the shape of a ring segment having first and second ends. The split ring seal has a multiple convoluted cross section with two... | 05/20/1986 |
| 4553775 | Resilient annular seal with supporting liner A fluid-tight sealing apparatus with a protective liner for sealing a pair of tubes having high temperature and pressure fluid flowing therethrough. The apparatus comprises an inner tubular surface coupled to the first tube and a sealing assembly coupled ... | 11/19/1985 |
| 4457523 | Torsionally flexible metallic annular seal A torsionally flexible annular seal in the form of a metallic, resilient sealing ring for a pair of concentric, hollow annular bodies having high pressure and temperature fluid flowing therethrough and having different thermal expansion rates and/or tempe... | 07/03/1984 |
| 4448449 | Flexible piping joint and method of forming same A fluid-tight coupling and sealing apparatus for first and second tubes having high pressure fluid flowing therethrough comprising a non-metallic ring rigidly received in the first tube via an interference shrink-fit and a metallic, resilient annular seal... | 05/15/1984 |
| 4218067 | Multi-ply sealing rings There is disclosed a resiliently deformable metallic annular sealing ring comprising an inner element and at least one adjacent concentric element. Each of the elements has a radial cross sectional shape comprising a curvilinear member which encompasses a... | 08/19/1980 |
| 4121843 | Multiple convolution sealing ring There is disclosed a sealing ring comprising an integral piece of resilient metal formed into three or more U-shaped annular convolutions and having outer legs which extend from the convoluted section in a direction essentially parallel to but leading sli... | 10/24/1978 |
| 4071269 | Flexible piping joint A flexible piping joint in the form of a fluid-tight coupling and sealing apparatus for two tubes having high pressure fluid flowing therethrough, the joint having angular, axial and rotational flexibility and comprising a metallic, resilient annular seal... | 01/31/1978 |
| 4071268 | Pressure compensated slide joint A pressure compensated slide joint for sealing first and second tubes having high pressure fluid flowing therethrough comprising a metallic, resilient sealing element extending from the first tube into an interference fit with the interior surface of the ... | 01/31/1978 |
| 4054306 | Tube and cylindrical surface sealing apparatus A fluid-tight sealing apparatus for sealing a tube to a cylindrical surface while subjected to axial, rotational and angular misalignments comprising a metallic, resilient sealing member on the tube having a ring portion with a curved surface for contacti... | 10/18/1977 |
