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| Number | Title | Issue Date |
| 8186688 | Shaft sealing device A shaft sealing device in which a load acting on a sliding section of the device is reduced to extend the life of the device and which permits no leakage of fluid in a machine to an atmospheric air. The shaft sealing device has seals arranged in three stages in the ... | 05/29/2012 |
| 7300060 | Seal staging system A staged seal assembly having a plurality of staged seals and an external pressure breakdown device connected to the seal assembly and configured to be connected to an external device, wherein each staged seal includes a shaft seal and a seal bypass. The seal bypass... | 11/27/2007 |
| 7293778 | Systems and methods for sealing between stators and rotors A seal is used between a housing and a shaft having an axis. The seal includes a first portion and a second portion engageable with each other and movable relative to each other. The first portion and the second portion are configured to be received in a cavity betw... | 11/13/2007 |
| 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 |
| 7252291 | Mechanical seal having a single-piece, perforated mating ring A mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) with reduced contact surface temperature, reduced contact surface wear, or inc... | 08/07/2007 |
| 7210687 | Shaft seal assembly A primary technical goal of this shaft seal device is to decrease the pressure of a sealant at a communication passage between a fluid chamber and a first seal portion, to further reduce the pressure by a floating ring, to make the first seal portion pressure-proof ... | 05/01/2007 |
| 7146822 | Centrifugal liquid pump with perimeter magnetic drive Embodiments of the invention provide a compact, seal-less, centrifugal liquid pump with a perimeter magnetic drive that is substantially smaller than a conventional centrifugal liquid pump having magnets attached directly to the impeller shaft. Because rotational fo... | 12/12/2006 |
| 7144015 | Modular gas seals cartridge A tandem gas seal assembly is described for sealing between the rotor and the casing of a rotary machine. The assembly comprises two sealing stages 10, 12 mounted axially adjacent to one another on the machine rotor. In the invention, wherein the two stages | 12/05/2006 |
| 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 |
| 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 |
| 6736731 | Cross member unit for universal joints having a trunnion seal A cross member unit for universal joints has a cross member (6) with four trunnions (17). Each two trunnions define a common longitudinal axis (7). Each trunnion (17) has an end face (18), a first sealing face (21) and a pre... | 05/18/2004 |
| 6612822 | Hydraulic motor system An improved hydraulic motor system, suitable for driving an automotive cooling fan or the like. The system is driven by grade gerotor set and an idle gerotor set which are stacked between a center plate and against a rear wall of a cylindrical cavity in a... | 09/02/2003 |
| 6371488 | Sealing system for high pressure closed systems having a rotating member and a housing therein A seal system for a motor pump unit includes a primary and a plurality of backup seals mounted in series within a seal housing. The primary seal is of a hydrostatic type and each of the backup seals is of a normally closed hydrodynamic type. Each of the p... | 04/16/2002 |
| 6293374 | Drum brake seal structure for all-terrain vehicle wheel A drum brake includes a brake drum attached to an axle, and a brake panel. The brake drum includes a disc portion and a cylindrical portion extending from an outer peripheral end portion of the disc portion towards the brake panel. On an outer peripheral ... | 09/25/2001 |
| 6224060 | Pump gas seal with particle exclusion device A gas seal construction for use on a pump to create a seal between a relatively rotatable pump shaft and housing. A flow barrier arrangement is disposed in close surrounding relationship to the shaft and cooperates with the surrounding housing axially bet... | 05/01/2001 |
| 5727792 | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump A chemical processing centrifugal pump is provided with a triple cartridge seal arrangement including a first seal axially spaced from a pair of concentric seals. The passageway along the pump shaft between the single seal and the radially inwardmost conc... | 03/17/1998 |
| 5697620 | Seal assembly having first and second seals acting in series To provide a better seal for example in an indexing arm for a machine tool to prevent swarf getting to the rubber seal, an outer spring seal is provided. The seal takes the form a closely wound coil spring formed into a ring and positioned in a slightly e... | 12/16/1997 |
| 5690471 | Water pump A water pump includes a shaft to which an impeller has been attached, and a water pump housing in which the shaft is freely rotatably supported by a plain bearing. An annular mandrel having a lip seal fixedly secured to its distal end is inserted into an ... | 11/25/1997 |
| 5642888 | Temperature and pressure resistant rotating seal construction for a pump A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. Stationary engaging ... | 07/01/1997 |
| 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 |
| 5494299 | Temperature and pressure resistant rotating seal construction for a pump A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. A temperature stabil... | 02/27/1996 |
| 5412977 | Turbo machine with an axial dry gas seal In a turbo machine, for example, a turbo compressor, the rotor shaft extends through and is sealed relative a housing via dry gas seals in which a seal clearance is achieved between a rotating, sealing body and a non-rotating sliding body in which the inn... | 05/09/1995 |
| 5411366 | Motor driven environmentally safe pump 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... | 05/02/1995 |
| 5340273 | Sealing and pumping means and methods environmentally leak-proof pump with misting chamber defined therein An environmentally leak-proof pump is provided including: an environmentally leak-proof motor housing having located therein a motor for rotatably driving a rotating shaft; a piston seal axially forward of the motor; and an oil misting chamber disposed be... | 08/23/1994 |
| 5333956 | Trolley wheel assembly A trolley wheel assembly (10) securely sealed to prevent loss of lubricant therefrom and entrance of contaminants therein. The assembly (10) comprises an inner race (12) disposed about an axis of rotation (14) and an outer race (16) concentrically dispose... | 08/02/1994 |
| 5312225 | Axially thrust-compensated turbo machine In a turbo machine with magnetic bearings on both sides and dry gas seals for the rotor, the axial thrust acting upon the rotor and generated by the pressure difference between the pressure side and the suction side is compensated for in that a dry gas se... | 05/17/1994 |
| 5261676 | Sealing arrangement with pressure responsive diaphragm means A seal construction is provided for sealing a rotating shaft against passage of a fluid along its central axis. The sealed construction includes a sealing flange fixedly mounted on the shaft and rotatable with the shaft. The sealing flange has a forward a... | 11/16/1993 |
| 5246087 | Device for radially transporting a medium to a rotating station A device for sealingly transporting medium, for instance lubricating oil, from a source to a receiving station rotatably movable relative thereto, which device comprises: a source for the medium; and a rotation bearing assembly comprising: at least one ro... | 09/21/1993 |
| 5217233 | Spiral groove seal system for sealing a high pressure gas A seal system for sealing a housing and rotatable shaft against leakage of a gas under high pressure; hydrogen is an example. The system, using multiple seals in tandem, provides a stepped reduction of high pressure gas at full height pressure to a low pr... | 06/08/1993 |
| 5133639 | Bearing arrangement for centrifugal pump The invention is an improvement in a centrifugal pump of the type having two or more pumping stages. Each stage includes a stationary diffuser and a companion rotatable impeller with a wear ring set arranged between the diffuser and impeller of each stage... | 07/28/1992 |
| 5096396 | Rotary apparatus having passageways to clean seal chambers Improvements are disclosed in a rotary, lobar, positive-displacement pump and in a rotary, centrifugal pump, whereby all product-contacting areas of the pumps can be effectively cleaned without disassembly, i.e., cleaned in place. Non-rotating seals seal ... | 03/17/1992 |
| 5058905 | Seal The sliding face (22) of a gas lubricated slide ring seal has a slide ring (20) which is displaceable in the axial direction at a wall (4) to be sealed and lies against the sliding face (21) of a mating ring (10) which is fastened on an intermediate sleev... | 10/22/1991 |
| 5029685 | Oil sealing structure for a hydraulic device for an automatic transmission Seal rings are set in oil grooves which are situated at both sides of two oil passages communicating two hydraulic actuators which operate oppositely. First and second seal rings oil-tightly seal between the first oil passage and sleeve, while third and f... | 07/09/1991 |
| 4964646 | Fluid handling apparatus with shaft sleeve and extension In a fluid handling appartus comprising a multi-stage mechanical seal assembly, an additional mechanical seal assembly to maintain a substantially constant exit pressure of leakage from the last stage of the multi-stage mechanical seal assembly, and a nov... | 10/23/1990 |
| 4936821 | Centrifugal separator with rotating seals on the fixed upper head The liquid being handled is introduced through a centrifugal conduit 1, is separated according to the different density and the two liquid phases exit through conduits 4 and 5. The centrifugal separator comprises disks for sealing (6, 11 and 19) which are... | 06/26/1990 |
| 4846728 | Floating seal arrangement for centrifugal separators and like rotating apparatus Rotating fluid-handling apparatus, e.g., a centrifugal separator has at least first and second elements which rotate relative to the other about a common axis. A seal assembly provides fluid-tight sealing between the elements, which define passages for fl... | 07/11/1989 |
| 4699575 | Adhesive pump and it's control system An improved adhesive pump and pump control system for automatically changing the flow rate of adhesive materials being dispensed onto a workpiece in conformance with changes in movement of a robot controlled adhesive dispensing nozzle used to apply adhesi... | 10/13/1987 |
| 4660786 | Pivot bearing arrangement for the control surface of a missile A pivot or bearing arrangement for the pivotable control surface of a guidable missile, especially a projectile which can be fired through the intermediary of the gas pressure generated by a propellant charge. The pivot bearing includes a control surface ... | 04/28/1987 |
| 4629196 | Coupler and manifold assembly with differential vacuum seal means A coupler and manifold assembly which makes it possible to turn the shaft and impellers of an absorption chiller circulating pump with an external drive means instead of a hermatically sealed drive means, comprising an interconnecting combination of a plu... | 12/16/1986 |
