Class / Patent application number | Description | Number of patent applications / Date published |
277399000 | Particular sealing face member configuration | 52 |
20080224416 | SPLIT MECHANICAL SEAL - A seal face ring for use with a split mechanical seal, the ring having diametrically opposed grooves along at least a portion of the surface of the ring. The grooves provide lines of weakness for splitting the ring segmentally and are inclined relative to each other. | 09-18-2008 |
20080284108 | SEAL - A bellows type seal for a quick connect coupling. The bellows seal has a torroidal portion ( | 11-20-2008 |
20090085301 | OIL SEAL - An oil seal ( | 04-02-2009 |
20090108533 | ROTATION SHAFT SEAL - A rotation shaft seal in which a plate-shaped supporting piece, supporting a seal element from a low-pressure side, has an axis-orthogonal wall portion, a sloped wall portion, and an inner peripheral end flat wall portion at right angles with an axis in cross section cut at a plane including the axis of the rotation shaft. | 04-30-2009 |
20090295098 | COATING APPARATUS AND METHOD - Two embodiments of end seal design are described, each having preferably three seal lips, one of which differs in the center of its radius of curvature from the center of radius of curvature for the other two seal lips. The end seal is gently spring loaded. In this way the end seal provides a good seal and minimizes spray, spatter, and slinging, and can accommodate various plunge depths and can accommodate various angles of attack of a nozzle upon an application surface such as a web or applicator roll. The nozzle is able to have any of various user-determined angles of attack upon the application surface. | 12-03-2009 |
20100038862 | Laser surface treatment for mechanical seal faces - A seal ring arrangement generally includes a pair of opposed seal rings which define a shaft seal to prevent leakage along the shaft of rotary equipment. A seal face treatment process has been developed using seal ring machining equipment which has a laser unit that forms micro-topography depth features in the seal face and then performs a material surface treatment process to selectively alter the conductivity of the seal face so as to virtually eliminate electro-corrosion in the seal rings. The seal rings preferably are provided in a conventional combination of a carbide seal ring material for one of the seal rings and a silicon carbide material for the other seal ring. The laser machining and the laser treatment processes are preferably applied to the silicon carbide material. | 02-18-2010 |
20100072710 | Gas Turbine Seal - A seal is provided for sealing two adjacent components of a gas turbine engine. The seal has first and second sealing surfaces that operate to seal the adjacent components to create an effective seal therebetween. Additionally, the seal has a first end and a second end, with the second end having a necked down portion, which is configured to internally engage the first end in a sliding, overlapping manner. | 03-25-2010 |
20100264601 | SHROUDED FACE SEAL AND COMPONENTS THEREOF - One embodiment of the face seal described herein includes a seal seat and a seal element carried by a seal housing. The seal element cooperates with the seal seat to establish a seal. The housing includes a seal element support and a shroud. The seal housing is made of a parent material and the shroud has a tip impregnated with a second material. | 10-21-2010 |
20110215531 | SLIDING COMPONENT - An aspect of the invention provides a sliding component in which a phase made of liquid and a phase made of gas, which are formed in a sliding portion, are stabilized. A sliding component constitutes one of two sliding components that rotate relatively, and planar end faces of the two sliding component slide on each other. In the sliding component, a plurality of dimples is arrayed in a sliding surface such that, in a phase made of liquid and a phase made of gas, the phase made of the gas is positioned when the two components rotate relatively. The phase made of the liquid and the phase made of the gas are formed so as to revolve about rotation centers of sliding portions of the two components. | 09-08-2011 |
20120248706 | SLIDE RING SEAL - The invention relates to a slide ring seal, in particular a running gear seal, at least comprising a slide ring, which is in operative connection with a counter running surface, in particular a counter ring, the slide ring having a sliding surface and an accommodating area for an elastomer spring element, at least the sliding surface of the slide ring being provided with a convex contour. | 10-04-2012 |
20140203516 | SEAL HAVING STRESS CONTROL GROOVE - A system, including an inner body, an outer body disposed about the inner body, and a grooved seal, wherein the grooved seal includes a sealing face and first and second side faces, wherein the first side face includes a first groove, the second side face includes a second groove, and the sealing face includes a third groove, wherein one of the inner body or the outer body includes an annular channel, and the grooved seal is disposed in the annular channel to seal an annular space between the inner body and outer body, wherein the sealing face seals against one of the inner body or the outer body, the first side face having the first groove seals against a first sidewall of the annular channel, and the second side face having the second groove seals against a second sidewall of the annular channel. | 07-24-2014 |
277400000 | Hydrodynamic feature | 21 |
20080237996 | Rotary leadthrough, especially for a torsional vibration damper in a drive train of a vehicle - A rotary lead-through includes a first rotary lead-through element having a first channel opening on a first boundary surface, and a second rotary lead-through element having a second channel opening on a second boundary surface which opposite from the first boundary surface and can rotate relative to the first boundary surface about an axis of rotation, the first and second channels being in fluid communication via a channel boundary space. A sealing arrangement acting between the first and second lead-through elements includes at least one sealing stage, each sealing stage including a first sealing element toward the boundary space and a second sealing element away from the boundary space, the first and second sealing elements enclosing a backpressure chamber surrounding the axis of rotation. Where successive sealing stages are provided, a pressure-limiting valve can be provided in parallel to the seal separating immediately successive backpressure spaces. | 10-02-2008 |
20080272552 | SEGMENTED SEAL PORTION AND ASSEMBLY - A segment of a seal assembly for sealing a higher pressure area from a lower pressure area is disclosed. The segment comprises a radial external surface, a radial internal surface for sealing against a rotating member, a transverse groove for maintaining a pressure around portions of the segment, and one or more pads including a scooping groove. The scooping groove is positioned at or in proximity to an edge of the transverse groove and provides for a transition flow between the one or more pads and the transverse groove. | 11-06-2008 |
20090051119 | Gas Turbine Engine Systems Involving Hydrostatic Face Seals with Integrated Back-up Seals - Gas turbine engine systems involving hydrostatic face seals with integrated back-up seals are provided. In this regard, a representative seal assembly for a gas turbine engine includes: a stator assembly and a rotor assembly configured to operatively engage each other to form a first seal and a second seal; the first seal being provided by a hydrostatic seal having a seal face and a seal runner; and the second seal being provided by a back-up seal such that responsive to a failure of the first seal, the back-up seal maintains at least a portion of a pressure differential established by the first seal prior to the failure. | 02-26-2009 |
20090051120 | Gas Turbine Engine Systems Involving Hydrostatic Face Seals - Gas turbine engine systems involving hydrostatic face seals are provided. In this regard, representative turbine assembly for a gas turbine engine includes a turbine having a hydrostatic seal formed by a seal face and a seal runner. | 02-26-2009 |
20090212501 | Self-Balancing Face Seals and Gas Turbine Engine Systems Involving Such Seals - Self-balancing face seals and gas turbine engine systems involving such seals are provided. In this regard, a representative self-balancing face seal assembly includes: a rotatable seal runner having a first seal runner face and an opposing second seal runner face; a first face seal operative to form a first seal with the first seal runner face, the first face seal being one of a hydrostatic seal and a hydrodynamic seal; and a second face seal operative to form a second seal with the second seal runner face, the first face seal being one of a hydrostatic seal and a hydrodynamic seal. | 08-27-2009 |
20110233872 | SEALING DEVICE - Provided is a sealing device that increases the lubricity of seal surfaces, prevents leakage of sealed fluids, and prevents excessive heat generation and excessive friction at seal surfaces. Said sealing device, which is of the type that seals a fluid trying to leak from the outer periphery of a sealing surface towards the inner periphery thereof, forms at least two dimples in a circumferential direction in each of a plurality of rows arranged in a radial direction on a sealing surface of a stationary-side sealing element or a rotating-side sealing element. Each dimple is tilted by a dimple angle θ between 0° and 90°, exclusive, such that the tip of that dimple in the direction of rotation is tilted toward the inner periphery side. In each of the plurality of rows of dimples, land areas are formed in the circumferential direction between the proximate tips of adjacent dimples. For each of the plurality of rows of dimples, if a circle is drawn through the centers of the dimples in that row, let L1 be the distance along the circle from the point the circle enters a dimple to the point the circle leaves that dimple, and let L2 be the length, along the circle, of the land areas between dimples. The dimples are characterized by being arranged such that the gap ratio L1/L2 is between 0.001 and 0.1, inclusive. | 09-29-2011 |
20120217705 | SLIDING MEMBER - An annular sliding member which is used in a mechanical seal, is attached to a rotating shaft, and slidably comes into contact, by being applied with energizing force in the axial direction, with another annular sliding member attached to a housing, wherein the sliding surface which comes into contact with the other sliding member is formed from: a dynamic pressure generating groove which guides a fluid to be sealed from a region to be sealed to the side of a region to not be sealed of the sliding surface, and a concave-convex section configured from a plurality of minute grooves which have a shallower depth than the dynamic pressure generating groove. | 08-30-2012 |
20120280456 | Tapered Channel Macro/Micro Feature for Mechanical Face Seals - A mechanical face seal includes a pair of relatively rotatable seal rings having opposing seal faces which define a sealing region therebetween. The sealing region extends radially between the inside and outside diameters of the seal rings to seal a fluid in a sealing chamber near one diameter thereof. The seal faces are provided with tapered channel macro/micro features which generate hydrodynamic lift during relative rotation of the seal rings. The tapered channel macro/micro feature shows significant improvement in seal performance when compared to an untextured face. Low contact and hence low wear are attributed to a more distributed hydrodynamic load support function. Likewise, low leakage is believed to be the result of optimized cavitation function, and no debris was discovered in the micro-features at the conclusion of any testing. | 11-08-2012 |
20140167361 | MECHANICAL SEAL - A mechanical seal has a structure wherein a plurality of sealed-fluid-accommodating blocks separated in the circumferential direction are formed on either the sealing face of a fixed ring or the sealing face of a rotating ring so as to communicate with a sealed fluid accommodation space. Pumping parts for creating a pumping action due to the fixed ring and the rotating ring sliding while undergoing relative rotation are formed on a bottom part of the plurality of sealed-fluid-accommodating blocks. The pumping parts formed on the bottom parts of the plurality of sealed-fluid-accommodating blocks are provided with an intake pumping part which acts in a direction in which the sealed fluid is drawn in and a discharge pumping part which acts in a direction in which the sealed fluid is discharged. | 06-19-2014 |
20140167362 | SLIDING PARTS - A plurality of circumferentially separated sealed-fluid-accommodating blocks are formed on either of the sealing faces of a stationary ring or rotating ring so as to communicate with a sealed fluid-containing space; pumping areas for generating a pumping action due to the sliding of the stationary ring and the rotating ring in relative rotation are formed on the bottom of the plurality of sealed-fluid-accommodating blocks; the pumping areas formed on the bottom of the plurality of sealed-fluid-accommodating blocks are provided with intake pumping areas operating in a direction so as to draw in the sealed fluid and outflow pumping areas operating in a direction so as to expel the sealed fluid; and a plurality of dimples are disposed on a seal dam area on a side of the sealing face on which the sealed-fluid-accommodating blocks are formed, the seal dam area being on the opposite side of the sealing face relative to the sealed-fluid side. | 06-19-2014 |
20140203517 | MECHANICAL FACE SEAL WITH A REVERSE TRAPEZOIDAL FACE PATTERN - An improved mechanical face seal is provided which includes a pair of relatively rotatable seal rings having opposing seal faces. At least one of the seal faces includes a reverse trapezoidal face pattern having a sine wave depth profile wherein individual face features are circumferentially spaced over the seal face. The reverse trapezoidal face pattern serves to generate a hydrodynamic lift which provides a stable separation of the seal faces that permits formation of a fluid film between the seal faces. The individual trapezoidal grooves have a sinusoidal or similarly shaped depth profile wherein the trapezoid shape is arranged with the narrower edge communicating with the high pressure side of the seal, and the wider edge forms a circumferential dam region towards the low pressure side of the seal. Alternatively, the reverse trapezoidal face pattern may also be provided as a primary face pattern on a dry gas seal in combination with a secondary face pattern wherein the faces operate with a controlled gap under normal pressure conditions as well as when the pressure direction across the seal face is reversed. | 07-24-2014 |
20140319775 | SEALING DEVICE - The invention provides a sealing device which can inhibit an external dust in an atmospheric side from intruding into a lip end, thereby inhibiting a sealing fluid leakage by trapped dust. In a sealing device inhibiting leakage of a sealing fluid in an inboard side to an atmospheric side, coming into contact with a shaft by a seal lip end and circumferentially having in an atmospheric side inclined surface of the seal lip with a plurality of screws exerting a pumping action to the sealing fluid, a three-dimensional shape for preventing the dust intrusion is provided between the screws so as to inhibit the external dust intrusion in the atmospheric side toward the lip end. The three-dimensional shape is constructed by a projection or a groove extending in a parallel direction to the lip end. The projection or the groove is connected to the screws longitudinally in both end portions. | 10-30-2014 |
20150084286 | SLIDING COMPONENT - A sliding component is characterized in that, on one sealing face of a pair of sliding parts that slide relative to each other, multiple positive pressure-generating mechanisms that include extremely shallow parallel grooves running roughly in parallel with the sealing face and having submicron-level height differences are provided independently in the circumferential direction, and that extremely shallow thin grooves are formed on the sealing face on the low-pressure fluid side of the extremely shallow parallel grooves, wherein the extremely shallow parallel grooves communicate with the high-pressure fluid side, and the extremely shallow thin grooves communicate with the extremely shallow parallel grooves, but are isolated from the low-pressure fluid side by a seal area, thereby reducing a leakage rate of sealed fluid and significantly improving lubrication characteristics at startup or stop at the same time. | 03-26-2015 |
20150097341 | SLIDING COMPONENT - A sliding component is characterized in that, on one sealing face of a pair of sliding parts that slide relative to each other, multiple positive pressure-generating mechanisms that include extremely shallow parallel grooves running roughly in parallel with the sealing face and having a submicron-level height difference are provided independently in the circumferential direction, and that the extremely shallow parallel grooves connect to the high-pressure fluid side, but are isolated from the low-pressure fluid side by a seal area. The sliding component can reduce a leakage rate of sealed fluid and significantly improve lubrication characteristics at startup or stop, while being actuated by means of fluid lubrication in a rotation phase, thereby achieving the effects of sealing and lubrication at the same time. | 04-09-2015 |
20150115540 | SLIDING COMPONENT - A sliding component is characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, and grooves with directionality are provided in a cavitation formation area in each dimple. | 04-30-2015 |
20150123350 | SLIDING COMPONENT - A sliding component, which achieves both sealing and lubrication by preventing cavitation from occurring in the dynamic-pressure generation mechanism and thereby solving the problem of leakage that will otherwise result from such cavitation, is characterized in that, on a sealing face of one of a pair of sliding parts that slide against each other, extremely shallow grooves constituting a Rayleigh step mechanism are provided in a manner facing the high-pressure fluid side of the sealing face, while deep fluid-introduction grooves for introducing the high-pressure fluid are provided on the upstream side of the extremely shallow grooves in a manner continuing to the high-pressure fluid side. | 05-07-2015 |
20150377360 | SLIDING PARTS - A mechanical seal for sealing faces includes a fluid circulation groove including an inlet section where a fluid comes in from a high pressure fluid side, an outlet section where the fluid goes out to the high pressure fluid side, and a communication section that provides communication between the inlet section and the outlet section is provided in one of sealing faces of a pair of sliding parts that slide on each other. The fluid circulation groove is isolated from a low pressure fluid side by a land section R. At least a sectional area of the groove in the inlet section or the outlet section is set to be different from a sectional area of the groove in the communication section in such a manner that pressure of the fluid flowing through the fluid circulation groove is lowered in the communication section. | 12-31-2015 |
20160097456 | MECHANICAL SEAL WITH HYDRO-PAD FACE PROFILE - A rotary end face seal assembly to seal a fluid under pressure includes a pair of annular mating ring seal faces with one of the faces defining a sealing interface between radially inner and radially outer peripheral edges. A plurality of hydro-pad recesses are formed radially inwardly from the peripheral edge of one of the seal faces at the pressure side of the seal assembly at peripherally spaced intervals and a plurality of feeder grooves are formed radially inwardly from the same peripheral edge of the seal face between at least some hydro-pad recesses. The radial extent of the feeder grooves is longer than the radial extent of the hydro-pad recesses. In one form a feeder groove is disposed between adjacent hydro-pad recesses. In another form a feeder groove is disposed between adjacent pairs of hydro-pad recesses. | 04-07-2016 |
20160097457 | Self-pumping hydrodynamic mechanical seal - A self-pumping hydrodynamic mechanical seal includes a rotating ring ( | 04-07-2016 |
20170234431 | MECHANICAL SEAL | 08-17-2017 |
20180023707 | SEALING DEVICE | 01-25-2018 |
277401000 | Fluid passage to the sealing face | 2 |
20150345641 | MECHANICAL FACE SEAL - A mechanical face seal and a method of using the mechanical face seal are described. The mechanical face seal includes a plurality of groove sets that are etched into a stationary seal and/or a rotating seal ring. Each of the plurality of groove sets includes feed grooves, collection grooves, distribution grooves, a collector, retention cavities and discharge grooves. The mechanical face seal can be used to reduce the friction that is generated from the stationary seal and the rotating seal ring during operation. Additionally, the groove sets work cooperatively to introduce, circulate and expel lubricant between the seal interface, thereby promoting cooling of the seal. | 12-03-2015 |
20160252182 | SLIDING PARTS | 09-01-2016 |
277402000 | Flexible projection (e.g., lip seal, etc.) | 16 |
20080203673 | Sealing Device With Sound Insulating Seal - To improve performance without increasing size, a sealing device comprises a seal body ( | 08-28-2008 |
20090014963 | Sealing ring - The present invention provides a sealing ring having at least eight sealing edges. Sealing rings, such as O-ring seals, are generally known. These universal sealing rings can be used for statically or dynamically sealing machine elements. They have the advantage of being suited for a wide variety of possible applications, and of being simple and cost-effective to manufacture. | 01-15-2009 |
20090051121 | SEAL FOR A ROTATING SHAFT - An encapsulated rotary seal around a rotating shaft, the seal having an outer annular body and an inner annular body. The inner annular body engages the rotating shaft and permits free rotation of the shaft while providing a liquid tight seal around the rotating shaft. The outer annular body is moulded about and permanently adhered to the inner annular body, the outer annular body permitting limited non-concentric or eccentric movement of the rotating shaft engaged to the inner annular body without affecting the integrity of the seal between the rotating shaft and the inner annular body. | 02-26-2009 |
20100066030 | HERMETIC SEALING DEVICE - To provide a sealing device having a side lip in slidably contact with a mate member like a slinger, wherein a contact state of the side lip is stabilized and sliding resistance of the side lip is reduced when lip tightening margin becomes maximum, a contact surface ( | 03-18-2010 |
20100201075 | ISOLATOR SEALING DEVICE - An isolator sealing device includes a stator, which locates into a housing of a piece of rotating equipment, and a rotor which radially locates onto a rotary shaft of the piece of rotating equipment. The rotor and stator have one or more adjacent surfaces facing a labyrinth seal and a lip seal which sealingly engages the stator or the rotor when the equipment is idle and sealingly disengages the stator or the rotor when the equipment is operational. | 08-12-2010 |
20120306156 | COMPRESSOR SEAL - The present invention is an apparatus for sealing in a compressor having a compressor housing and a rotatable shaft extending through the compressor housing, with a pressure seal having a first sealing member and a first sealing lip abutting and adjacent to, respectively, said housing and rotatable shaft, and a seal guide attached to the compressor housing and extending radially inward toward the rotatable shaft for maintaining alignment of the pressure seal. | 12-06-2012 |
20130119612 | LEAF SEAL - A leaf seal is provided for effecting a seal between two coaxial, relatively rotating components. The leaf seal has a pair of annular packs of stacked leaves. Each pack is mountable to one of the components with its leaves extending towards the other component such that the leaf edges of at least one of the packs are presented for wiping contact with the other component. The packs are axially spaced from each other by a controlled axial clearance. Within each pack the leaves are stacked face-to-face such that neighbouring leaves are separated from each other by interleaf gaps which allow an axial leakage flow through the seal. Further, within each pack the packs are positioned such that, when viewed in the axial direction, the leaves of each pack of the pair substantially obscure the interleaf gaps of the other pack of the pair. The controlled axial clearance is the dominant flow restriction in the seal determining the amount of leakage flow through the seal. | 05-16-2013 |
20130119613 | LEAF SEAL - A leaf seal is provided for effecting a seal between two coaxial, relatively rotating components. The leaf seal has an annular pack of leaves which are stacked face-to-face within the pack, and which are mountable to one of the components at respective root portions of the leaves such that the leaves extend towards the other component and respective edges of the leaves are presented for wiping contact with the other component. The pack includes a plurality of spacers, each spacer separating the root portions of neighbouring leaves to form therebetween interleaf gaps which allow an axial leakage flow through the pack. The spacers are distributed around the pack such that the leaves are divided into blocks of two or more leaves sandwiched at their root portions between nearest-neighbour spacers. | 05-16-2013 |
20130313786 | Sealing Ring - In seal rings for the sealing of shafts for propeller shafts, impeller shafts, rudder shafts of ships, an arrangement is provided, wherein a clamp-in element in allocated housing-fixed support rings as an installation space is provided with an adjoining intermediate part as a membrane and an angled element facing toward the shaft with formation of a seal lip for contact on the shaft. Thereby the contact region of the seal lip on the shaft is formed by a circle-shaped seal region with a constant radius over the entire adjustment range. Alternatively, the contact region of the seal lip on the shaft is formed by a circle-shaped seal region, whereby in the unloaded condition the seal region in the region facing toward the medium to be sealed comprises a smaller radius relative to a radius in the rearward region of the seal lip. | 11-28-2013 |
20140167363 | Seal for Rolling Screw, and Rolling Screw - A seal for a rolling screw capable of preventing an unintended contact with the threaded shaft, while maintaining advantages of a lip tilting perpendicularly to the axial direction, and the rolling screw using the seal are provided. In the seal for the rolling screw including: a circular ring part ( | 06-19-2014 |
20140265144 | CONFORMAL WEAR-RESISTANT SEAL - A seal apparatus includes: (a) first and second machine elements defining a sealing interface between two zones subject to different fluid pressures, a boundary of which lies between the two elements; (b) a seal comprising rigid material carried by the first machine element and having an annular lip defining a first contact surface; (c) a second contact surface comprising rigid material, defined by the second machine element; (c) wherein both contact surfaces are wear resistant, and the first and second contact surfaces bear directly against each other, so as to seal against fluid leakage between the first and second zones, while allowing relative sliding motion between the first and second contact surfaces; and (d) wherein the seal is configured to allow the lip to deform elastically and permit the first contact surface to conform in a regular or irregular shape to the second contact surface. | 09-18-2014 |
20150377357 | V-RING SEAL WITH WIPERS - A seal assembly is for sealing a space between first and second members and includes a generally annular elastomeric seal body disposed about an outer surface of the first member and extending circumferentially about a central axis. The body includes a base portion and a sealing portion, the sealing portion having an inner end integrally formed with the base portion and an outer, free end sealingly engageable with an axial surface of the second member so as to define a generally annular seal interface. A wiper is coupled with the seal body and has an engagement portion contactable with an axial surface of the second member at a position spaced radially outwardly from the sealing portion outer end. As such, the wiper engagement portion directs substances on the second member axial surface generally away from the sealing interface when the wiper contacts the substances during rotation of the rotatable member. | 12-31-2015 |
20160018003 | V-RING SEAL WITH SHIELDS - A seal assembly is for sealing a space between first and second members, the first member having a central axis and an outer circumferential surface extending about the axis, the second member having a radially-extending axial surface, the first member being rotatable about the central axis. A generally annular elastomeric seal body is disposed about the first member outer surface and extends circumferentially about the central axis, the body including a base portion and a sealing portion, the sealing portion having an inner end integrally formed with the base portion and an outer, free end sealingly engageable with the second member axial surface so as to define a generally annular seal interface. At least one shield is coupled with the second member and spaced radially-outwardly from and located generally vertically above the seal interface so as to provide a barrier for preventing entry of substances into the seal interface. | 01-21-2016 |
20160153300 | SEALING ASSEMBLY | 06-02-2016 |
20160377180 | DOUBLE SIDED OUTER SEAL - Seal with a body that has bilateral symmetry. The body comprises of a first sealing lip on a right side of the body and a second sealing lip on the right side of the body that is positioned radially below and axially inward with respect to the first sealing lip. The body further comprises of a third sealing lip on a left side of the body and a fourth sealing lip on the left side of the body positioned radially below and axially inward with respect to the third sealing lip. In the installed position, the first sealing lip is flexed away from the second sealing lip and the third sealing lip is flexed away from the fourth sealing lip. | 12-29-2016 |
20160377182 | ROTARY SHAFT SEAL - A rotary seal and rotary machine incorporating such a rotary seal. The rotary seal includes a first race defining a plurality of grooves, and a second race defining a plurality of sealing lips. The plurality of sealing lips are disposed in the plurality of grooves such that a compound seal is formed between the first and second races, and the first race and the second race are relatively rotatable. | 12-29-2016 |
277403000 | Angled or tapered sealing face | 2 |
20090045584 | Carbon Dioxide Gas Sealing Enclosed Device - To reduce a shaft insertion load and ensure a sealing function, a carbon dioxide gas sealing device ( | 02-19-2009 |
20090045585 | ROCK BIT HAVING A SEAL GLAND WITH A CONICAL SEALING SURFACE - A sealing system is provided for a drill bit including a bit head and a rotating bit cone. The sealing system includes a seal gland and a seal retained within the seal gland. The seal gland is defined by a radial cone surface and is further defined by a head sealing surface and an opposed cone sealing surface. At least one of the head sealing surface and opposed cone sealing surface is not cylindrical (i.e., the surface is conical and not parallel to an axis of rotation for the cone). Additionally, the radial cone surface may be conical (i.e., the surface does not extend perpendicular to the axis of rotation of the cone). The seal is radially compressed between the head sealing surface and the opposed cone sealing surface. The use of one or more conical surfaces in the gland is provided to bias the compressed seal into a preferred dynamic sealing zone. | 02-19-2009 |