Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8162322 | Hydrodynamic seal with circumferentially varying lift force A seal assembly which operates efficiently at high altitudes and low surface speeds includes a first seal ring, a second seal ring, and hydropads. The first seal ring is of a generally annular shape and defining radial and circumferential directions. The second seal... | 04/24/2012 |
| 7762558 | Device for sealing a rotating shaft penetrating a housing wall A device for sealing a rotating shaft that penetrates a stationary housing wall has a sealing ring fastened to the housing wall and arranged between the housing wall and a shaft. The sealing ring has sealing oil supply bores supplying sealing oil into a sealing gap ... | 07/27/2010 |
| 7377518 | Mechanical seal ring assembly with hydrodynamic pumping mechanism A seal ring configuration adapted to be disposed about a shaft to seal a fluid at a pressure differentials across the seal. The seal ring configuration comprises a mating ring and an axially movable primary ring. The primary ring includes a seal face in opposing rel... | 05/27/2008 |
| 7320468 | Sealing arrangement A sealing arrangement for sealing a leakage gap between relatively moveable parts in a flow path between a region of high fluid pressure and a region of low fluid pressure comprises a sealing member having an upstream surface, a downstream surface, a radially outer ... | 01/22/2008 |
| 7287756 | Film riding shaft seal The invention is a film-riding seal for a pump shaft that is resistant to the deposition of iron oxides such as hematite and goethite on the confronting, spaced apart, seal surfaces. The seal generally comprises a ceramic runner mounted on the pump shaft and an adja... | 10/30/2007 |
| 7284758 | Textured seal for reduced wear The present invention relates to seals having textured features. The present invention particularly relates to seals having contact surfaces with said features wherein the contact surface seals properly and is resistant to wear. The contact surface is able to perfor... | 10/23/2007 |
| 7261300 | Hydrodynamic foil face seal A foil thrust bearing forms the primary rotating interface for a film riding face seal. This face seal includes a spring system that will allow the entire assembly to translate axially relative to a static attachment. The complete assembly will form a hybrid foil/fi... | 08/28/2007 |
| 7258346 | Sliding element A primary objective of a sliding element of the present invention is to decrease a friction coefficient of the sliding face and to improve seal performance thereof. The sliding element comprises a first dam section (6) which is configured in an annular form o... | 08/21/2007 |
| 7256523 | Magnetic mounting of a rotor shaft relative to a stator, using a high-Tsuperconductor A first bearing part is arranged fixedly in terms of rotation on a rotor shaft with permanent magnetic elements arranged next to one another and flux guide elements arranged between them. A second bearing part, separated from the first bearing part by a bearing gap,... | 08/14/2007 |
| 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 |
| 7216871 | Non-contacting seal for rotating surfaces A non-contacting seal for sealing in high temperature applications includes at least one segment having an inner pad with a hydrodynamic/hydrostatic lift-off geometry enabling the seal to run in a non-contact mode, and at least one finger spring supported on the pad... | 05/15/2007 |
| 7185137 | Bus bridge with stored controlling relay information A bus bridge is connected to a primary bus and a secondary bus, and relays data between a master and a target which are each connected to a different one of the primary and secondary buses. The bus bridge includes a primary bus interface, a secondary bus interface, ... | 02/27/2007 |
| 7174990 | Tangential stress reduction system in a loudspeaker suspension The invention is a suspension element having an outer edge and an inner edge. The suspension element, such as a spider or surround, varies in shape along at least a portion of the suspension element to help relieve both the radial and tangential stress placed on the... | 02/13/2007 |
| 7175388 | Integrated labyrinth and carbon seal An integrated double seal assembly includes a carbon seal ring and at least one annular labyrinth seal fin. The seal provides a compact solution for sealing a rotating shaft. ... | 02/13/2007 |
| 7156399 | Sealing device and sliding member A sealing device comprises a sealing member brought into contact with a contact surface so as to be slidable in a predetermined sliding direction. The sealing member comprises a sliding contact portion containing a high polymer material to be brought into sliding co... | 01/02/2007 |
| 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 |
| 7125020 | Vented high pressure shaft seal A rotary fluid pressure device (11) having a housing (13,31), inlet and outlet ports (21,23), a gerotor gear set (15), a valve member (51) and an input-output shaft (49). A seal assembly (73) is disposed radially betw... | 10/24/2006 |
| 7125084 | Environment protector-pressurized wheel hub A hub cap for a wheel hub having a cylindrical housing with a closed first end and an open second end adapted for attachment in an air-tight sealing arrangement to the outer end of a wheel hub to form a closed air system in the interior of the wheel hub. An air pres... | 10/24/2006 |
| 7117961 | Dynamic seal with soft interface A device and method for dynamically sealing between rotatable members such as a rolling cone of a rock bit. The assembly includes a seal ring having a facing surface of a relatively hard material, such as hardened steel or tungsten carbide, and a second seal ring of... | 10/10/2006 |
| 7052017 | Rotary machine with seal The so-called comb-type labyrinth sealing device (S1) is disposed in a gap between a rotor blade (2), i.e. a rotating member, and a labyrinth packing (9), i.e. a stationary member. The sealing device (S1) has a plurality of sealing fins (... | 05/30/2006 |
| 7052016 | Sliding element The present invention relates generally to a technical domain of a sliding element engaging a relative rotational motion. A primary objective of a sliding element of the present invention is to decrease a friction coefficient of the sliding face and to improve the s... | 05/30/2006 |
| 7047908 | Cooling flange An apparatus has a body with first and second faces, an inboard surface bounding a central aperture, an outboard perimeter, and an array of bolt holes between the first and second faces. A channel is inboard of the bolt holes and first and second ports communicate w... | 05/23/2006 |
| 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 |
| 7040628 | Large diameter polytetrafluoroethylene or like seals A large-diameter PTFE seal. The lip of the seal is made from a long strip of PTFE bound together at the ends with the aid of a patching tape to form a closed loop. The loop is then flanged and placed between an inner and an outer case, together with a rubber-like ga... | 05/09/2006 |
| 7025357 | Shaft seal having lip supports A shaft seal includes an elastomeric annular body having an outwardly protruding annular lip. An annular outer case is embedded into the body. An annular insert is positioned adjacent the outer case. An annular inner case is embedded into the body adjacent the inser... | 04/11/2006 |
| 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 |
| 7004119 | Apparatus and method for rotating sleeve engine hydrodynamic seal A hydrodynamic face seal 100 for sealing between the cylinder head 300 and rotating sleeve 200 of a rotating liner engine. The face of the face seal provides a sealing zone 130 for maintaining a lubricant layer of about 2 micrometers betw... | 02/28/2006 |
| 6969236 | Fluid-cooled mechanical face seal rotor A fluid-cooled seal rotor is described for a seal assembly that includes a seal case, a seal stator, and wherein the rotor has a sealing face on a first side and a heat-transfer structure on a second side. The heat-transfer structure may be a roughened surface. The ... | 11/29/2005 |
| 6945537 | Sealing ring A sealing ring comprising a bearing ring with a radial flange and a sealing sleeve, which at its free end is connected to a thickened, surrounding bulge. ... | 09/20/2005 |
| 6932567 | Method and apparatus for controlling fluid leakage through gas turbine engines A method for controlling fluid leakage between a first pressure region and a second pressure region within a gas turbine engine using a first sealing member and a second sealing member. The first sealing member is movably coupled to a portion of the gas turbine engi... | 08/23/2005 |
| 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 |
| 6902168 | Sliding element A primary objective of the present invention is to decrease the friction coefficient of the sliding face of a sliding element and to improve its seal performance. The sliding element disposes a plurality of elongate dimples in the outer circumferential region and th... | 06/07/2005 |
| 6877950 | Method and device for minimizing oil consumption in a gas turbine engine A method of minimizing oil consumption in a gas turbine engine, by avoiding reliance on air intake into the engine oil circuit for bearing chamber oil sealing purposes. The engine oil circuit has bearing chambers with hydropad seals between the shaft and bearing cha... | 04/12/2005 |
| 6726213 | Bi-direction rotatable face seal with spiral grooves A bi-direction rotatable face seal with spiral grooves is provided comprising: a rotating ring with a sealing face sealed and fixed on a rotary shaft; a stationary ring with a sealing face mounted in a casing, which is sealed and axially aligned by means of an elast... | 04/27/2004 |
| 6705844 | Dynamic seal A seal is disposed between a rotating part and a stationary part. At least one of the parts is provided with projections which protrude into the seal gap. The seal gap (5) extends approximately radially so that both parts are provided with projections which e... | 03/16/2004 |
| 6663367 | Shaft seal structure of vacuum pumps A Roots pump rotates a plurality of rotors by a pair of rotary shafts to draw gas. Each rotary shaft extends through a rear housing member of the Roots pump. An annular shaft seal is fitted around each rotary shaft and is received in a recess formed in th... | 12/16/2003 |
| 6655693 | Non-contacting gas compressor seal A non-contacting gas compressor seal assembly is disclosed with an intermediate buffer chamber. The process gas is corrosive or otherwise hazardous and is contained from entering the atmosphere by pumping the barrier gas toward the process fluid. The inbo... | 12/02/2003 |
| 6619664 | Wear improvement to textured lip seal Multiple circumferential rows of textured features are formed between the outer peripheral edge and the inner peripheral edge of a seal. The multiple circumferential rows of textured features form a boundary for incoming dirt and wash away abrasive partic... | 09/16/2003 |
| 6578850 | Dynamic seal for a drive shaft A dynamic seal for a drive shaft including a seal housing with at least one inlet for injecting a fluid, (i.e., a liquid or gas) into the seal. The seal also has an expeller device, such as an expeller ring mounted on the drive shaft, for expelling the in... | 06/17/2003 |
