Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7726659 | Static pressure type non-contact gas seal The present invention provides a static pressure type non-contact gas seal which, even when supply of seal gas 6 to the space between sealing end surfaces 3a and 4a has stopped unexpectedly, can be safely used with no possibility t... | 06/01/2010 |
| 7665739 | Pressure-actuated seals for rotating members An air swivel ring includes a non-rotating member having an air inlet, a rotating member having an air outlet, and a split seal having a first sealing surface and coupled to one of the non-rotating member and the rotating member so that the first sealing surface on ... | 02/23/2010 |
| 7249768 | Shaft seal assembly and method A pressure-actuated shaft seal assembly and associated method for controlling the flow of fluid adjacent a rotatable shaft are provided. The seal assembly includes one or more seal members that can be adjusted between open and closed positions, for example, accordin... | 07/31/2007 |
| 7222861 | Sealing in a hydraulic turbine unit System for providing sealing between a rotor and a turbine casing in a hydraulic turbomachine includes a sealing ring arranged in a peripheral region of the rotor. The sealing ring forms at least one hydrostatic bearing with respect to at least one of the rotor and ... | 05/29/2007 |
| 7189054 | Self-compensating clearance seal for centrifugal pumps A radial seal is provided for installation within a centrifugal pump of the type having an impeller, a pump casing having a suction inlet, a sealing ring groove formed in the pump casing, and means for supplying flushing water to the sealing ring groove. The radial ... | 03/13/2007 |
| 7147230 | Sealing device and sleeve and holding element for such The sealing device is for drum filters or filter presses to form a seal between the rotary drum end faces and the end faces of the trough in which the rotary drums are situated. A sealing element (3) is disposed in a groove (1) on the rotary drum end f... | 12/12/2006 |
| 7144016 | Dry gas seal A gas seal assembly comprises a pair of mutually rotatable sealing members A, B, each of which has a face adjacent a gap between the two members. One of the members B is urged in a direction attempting to close the gap h which constitutes a leakage path through the ... | 12/05/2006 |
| 7066719 | Bore and shaft assembly An exemplary bore for a shaft of a turbomachine includes a longitudinal axis extending generally from an inner end to an outer end of the bore, an outer seat disposed proximate to the outer end of the bore at an outer seat radius for an outer seal ring wherein the o... | 06/27/2006 |
| 7066469 | Seal assembly for machinery housing A seal assembly for a machinery housing includes a seal ring having a micro heat exchanger and a gland plate for securing the seal ring to the machinery housing. The gland plate includes a cooling fluid port in communication with the micro heat exchanger. ... | 06/27/2006 |
| 7044470 | Rotary face seal assembly A rotary seal assembly including a first member having a sealing face and a second member having a sealing face with a number of pumping grooves therein. At least a first set of pumping grooves stating proximate a center portion of the sealing face and extending out... | 05/16/2006 |
| 7040627 | Cinchpac self-loading rotary shaft seal A seal assembly which is secured to a rotating shaft and which seals around the shaft. The seal assembly has molded grooves adjacent to the shaft which grasp the shaft and prevent leakage. ... | 05/09/2006 |
| 7014192 | Multistage shaft sealing apparatus A plurality of seal units are provided between a seal housing and a rotating shaft. An inside seal unit, an outside seal unit, and at least one pair of intermediate seal units are aligned in an axial direction. The inside seal unit contacts fluid to be sealed. The o... | 03/21/2006 |
| 6994351 | Mechanical seal device and method for a scraped surface heat exchanger A sealing method and apparatus is provided for sealing between a rotating shaft and a fixed housing such as found in scraped surface heat exchangers. The sealing apparatus and method includes a sealed cartridge where a gland and a trapped seal ring can be releaseabl... | 02/07/2006 |
| 6959929 | Seal for a compressor and centrifugal compressor equipped with such a seal A seal for a rotary compressor comprises a casing, at least one assembly having a rotating seal face ring which rotates as one with a sleeve intended to be mounted on a shaft of the compressor and of a stationary seal face ring mounted on the casing, the seal face r... | 11/01/2005 |
| 6942219 | Mechanical seal having a double-tier mating ring An apparatus and method to enhance the overall performance of mechanical seals in one of the following ways: by reducing seal face wear, by reducing the contact surface temperature, or by increasing the life span of mechanical seals. The apparatus is a mechanical se... | 09/13/2005 |
| 6905123 | Seals A gas seal for providing a seal between a pair of relatively rotatable components is provided with a stand-still seal which will seal between the components when the components are stationary, the stand-still seal having a sealing element mounted in sealing relation... | 06/14/2005 |
| 6739829 | Self-compensating clearance seal for centrifugal pumps A seal for use in a centrifugal pump of the type used for pumping an abrasive slurry, and having a sealing ring groove formed in the pump casing and an arrangement for supplying flushing water, comprising a radial seal having a sealing end, a water receiving end, an... | 05/25/2004 |
| 6739592 | Brush seal device A brush seal device is mounted to one of two parts that move relative to each other with a gap therebetween, and seals the gap between the parts. Even when a brush seal abuts on the other part, it is deformed accordingly. As a result, wear of the brush seal is preve... | 05/25/2004 |
| 6708980 | Mechanical sealing device Even high viscosity fluid or slurry-contained fluid is securely sealed without deficiency of a liquid sealing device. The sealing liquid device includes an annular packing made of rubber-like elastic material, the annular packing having a secured section fitted with... | 03/23/2004 |
| 6550776 | Intermediate metallic layer for flat packing and process for the production of a flat packing with such an intermediate layer A vacuum packing configuration and installation for use therewith, has a first part and a second part. The first part includes a hydraulically or pneumatically expandable, medium-tight volume adapted to be acted upon by an hydraulic or pneumatic medium, w... | 04/22/2003 |
| 6517077 | Mechanical seal, and agitating device and process using same The invention relates to a mechanical seal that may control the pressure between sliding faces of sliding rings in the mechanical seal portion and also clean and sterilize the sliding faces reliably, and an agitating device and process using the mechanica... | 02/11/2003 |
| 6450502 | Rotary seal with relief angle for controlled tipping A sealing device for sealing the gap between two relatively moving members is provided with a pivot point on its cross-sectional perimeter. As pressure against the seal increases, the seal rotates about the pivot point, resulting in an increased sealing s... | 09/17/2002 |
| 6379127 | Submersible motor with shaft seals A submersible electric motor driven pump includes a motor chamber and a pump chamber separated by a seal chamber. Inboard and outboard shaft seals immersed in an oil buffer fluid within the seal chamber restrict the flow of liquid from the seal chamber in... | 04/30/2002 |
| 6325382 | Non-contact type mechanical seal A static pressure non-contact type mechanical seal that exhibits and maintains a high sealing function or performance for a prolonged period even when sealing gases containing foreign matter such as oil. A labyrinth seal (7) comprising a plurality of annu... | 12/04/2001 |
| 6305691 | Shaft sealing apparatus A shaft sealing apparatus capable of preventing gases vaporized from a gas seal or purge fluid from leaking outside before a pressure switch operates due to a pressure rise resulting from a fluid leakage from a mechanical seal. The apparatus comprises a s... | 10/23/2001 |
| 6213473 | Double gas seal with coplanar pad faces A double gas pressure seal 10 is provided for sealing between a stationary housing 14 and a rotary housing 26. The gas pressure seal includes a stationary ring 42 and a rotary ring 40 each having a radially inner sealing face and a radially outer sealing ... | 04/10/2001 |
| 6182973 | Intermediate metallic layer for flat packing and process for the production of a flat packing with such an intermediate layer A vacuum packing configuration and installation for use therewith, has a first part and a second part. The first part includes a hydraulically or pneumatically expandable, medium-tight volume adapted to be acted upon by an hydraulic or pneumatic medium, w... | 02/06/2001 |
| 6173962 | Brush seal A brush seal includes a mounting ring that carries radially inwardly directed bristles. A backing member attached to the mounting ring is positioned alongside the bristles. A chamber defined by the bristles and the backing member is pressurized with fluid... | 01/16/2001 |
| 6145840 | Radial flow seals for rotating shafts which deliberately induce turbulent flow along the seal gap A face seal is provided for a rotating shaft for sealing between a normally high pressure region and a normally lower pressure region, having a seal ring shaped to form a gap between the ring and a runner surface on the shaft, which gap converges in the d... | 11/14/2000 |
| 6131912 | Split mechanical face seal A split mechanical face seal that provides fluid sealing between a housing and a rotating shaft includes first and second seal rings each having at least two seal ring segments and a radially extending seal face. The seal ring faces of the seal rings are ... | 10/17/2000 |
| 6076830 | Dual non-contacting mechanical face seal having concentric seal faces A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a first seal ring having a first seal face and a second seal ring having a second seal face. The first seal face further has a first portion and a second portio... | 06/20/2000 |
| 6059293 | Split mechanical face seal with seal face fluid introducing structure A split face seal that provides fluid sealing between a housing and a rotating shaft includes first and second seal rings each having at least two seal ring segments and a radially extending seal face. The seal ring faces of the seal rings are opposed to ... | 05/09/2000 |
| 6059202 | High pressure liquid rotary coupling with slip seal A high pressure liquid sealing connection between two relatively rotatable liquid passage members of a rotary nozzle or a swivel. The connection is formed by two abutting relatively rotatable annular coaxial sealing members forming a high pressure liquid ... | 05/09/2000 |
| 5954341 | Bellows seal with drive collar for reverse pressure capability A seal for sealing a low pressure area from a high pressure area for containing a process fluid. The high pressure area is located along a rotatable shaft extending from a machine body. The seal includes an outboard seal positioned along the shaft and an ... | 09/21/1999 |
| 5941531 | Double gas seal having an improved bellows arrangement An improved gas seal having inboard and outboard seal units each defined by a pair of opposed and relatively rotatable seal faces, one face of each pair having appropriate grooves which communicate with a pressurized barrier gas, preferably an inert gas s... | 08/24/1999 |
| 5904355 | Rotary seal A rotor for collecting and centrifuging biological fluids in a range of volumes. The rotor includes an elastic impermeable diaphragm which defines at least a portion of a variable-volume processing chamber, where the fluid is centrifuged. The rotor includ... | 05/18/1999 |
| 5865441 | Emission seal The shaft seal assembly of cartridge designed for sealing shafts entering or exiting enclosed vessels. The enclosed vessels may have a pressure different from the atmospheric pressure and the seal will normally prevent leakage from or into the vessel. The... | 02/02/1999 |
| 5762342 | Mechanical seal with controller for regulating face contact pressure A mechanical seal assembly for creating a sealing relationship between a housing and a shaft which is rotatable relative thereto. The seal assembly includes first and second coaxially aligned and axially adjacent seal rings disposed in an encircling relat... | 06/09/1998 |
| 5662171 | Rotating blowout preventer and method The rotatable blowout preventer 10 includes a stationary outer housing 12 and a rotatable inner housing 38 having a curved surface 42 thereon defining a portion of a sphere. An annular packer assembly 46 includes spherical packer elements for sliding enga... | 09/02/1997 |
| 5499902 | Environmentally safe pump including seal A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disp... | 03/19/1996 |
