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| Number | Title | Issue Date |
| 8177236 | Seal assembly A seal assembly (100) for sealing a rotatable shaft entering a workspace is provided, the seal 5 assembly (100) comprising first and second sets of seal rings (110′, 110″; 170, 170′) separated by a space defined by the seal ring set... | 05/15/2012 |
| 8011668 | Close coupled mechanical seal The present invention provides a modular gland member for use in a mechanical seal, wherein the gland member has a radially or axially extending cavity adjacent to a seal face, and the cavity includes a solid or fluid thermal conducting member to dissipate heat from... | 09/06/2011 |
| 7909336 | Arrangement of a shaft with a mechanical face seal mounted thereon An arrangement of a shaft with a slip-ring seal mounted thereon is disclosed. The slip-ring seal (3) comprises a pair of cooperating slip rings (4,5), the sealing faces of which define a sealing gap (6) between them. One of the slip rings is mou... | 03/22/2011 |
| 7354191 | Mortar mixer and trunnion assembly A mortar mixer includes a substantially cylindrical drum having end plates supporting trunnion assemblies, with housings, having an interior space defined by an interior surface around the paddle shaft. A first seal is located adjacent the end plate and is positione... | 04/08/2008 |
| 7347423 | Arrangement in connection with mechanical seal An arrangement in connection with a mechanical seal includes at least two sliding surfaces pressing against each other, which are arranged to seal a gap between a rotating and a non-rotating machining part, and mechanism for providing a sealing fluid flow cooling th... | 03/25/2008 |
| 7338049 | Self-cooling ferrfluid seal A self-cooling ferrofluid seal includes a housing having a housing case and an external pole piece integrally connected to the housing case where the housing case has a plurality of heat dissipating surfaces, a magnetic circuit within the housing formed in conjuncti... | 03/04/2008 |
| 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 |
| 7291947 | Electric rotating machine with bearing seals Hydrogen gas is circulated to cool an electric rotating machine main body, and brush seals are provided to contact a predetermined position on the outer circumferential surface of a rotating shaft. As a result, contact of a sealing oil and the hydrogen gas, contact ... | 11/06/2007 |
| 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 |
| 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 |
| 7229076 | Mechanical seal A balance ratio for a stationary seal ring is designed to allow a seal face to be opened when, with a rotary seal ring at standstill, steam of a predetermined pressure is supplied to an endo-fluid region while a sealing-fluid region is brought into an exhausting sta... | 06/12/2007 |
| 7121716 | Mixing equipment sealing device A shaft sealing arrangement for sealing bores around a pair of stirrer shafts that emerge through a wall of an associated mixing vessel includes a pair of generally cylindrical shaft sealing assemblies designed to be carried on adjacent stirrer shafts, each gland as... | 10/17/2006 |
| 7112033 | Hygienic mechanical seal flushing system for pure liquids in sanitary centrifugal pumps A sanitary centrifugal pump with a hygienic mechanical seal flushing system. The pump has a housing with a pumping chamber defined therein. An impeller is at least partially contained in the housing and is connected to a shaft for rotation. The rotation of the impel... | 09/26/2006 |
| 7097176 | Balanced mechanical seal assembly A mechanical seal having a single rotatable seal ring having a pair of concentric seal faces to form a radially inner seal face and a radially outer seal face. The mechanical seal also includes first and second stationary seal rings, each having a seal face, where t... | 08/29/2006 |
| 7093418 | Gas turbine engine including a low pressure sump seal buffer source and thermally isolated sump A gas turbine engine is configured to use relatively cool, low pressure air discharged from a low pressure compressor to supply buffer air to lubrication sump seals. The engine is further configured such that the lubrication sump is thermally layered by isolating re... | 08/22/2006 |
| 7082962 | Seal support system for maintaining barrier fluid pressure within a mechanical seal An intelligent seal support management system includes a device for automatically compensating for increased heat or decreased heat in a vessel. ... | 08/01/2006 |
| 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 |
| 7052015 | Cooling arrangement for brush seal A brush seal adapted to restrict a fluid flow through a gap between a first component and a second component, comprising: a body; a brush pack secured to the body; and a passage through the body for introducing a cooling flow to the gap. The passage has a first end ... | 05/30/2006 |
| 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 |
| 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 |
| 7004473 | Mechanical seal device A primary object of the present invention is to achieve a high sealing performance, to collect hazardous gas contained in a sealed process fluid, and to realize an easy disposition of a mechanical seal device. A typical configuration is that the end face of a shaft ... | 02/28/2006 |
| 6997601 | Agitator with removable blades for sanitary tank A sanitary tank is provided with a clean-in-place agitator assembly in which the impeller portion is removably installed at the tip or the shaft or along the shaft. A shaft housing that penetrates the wall of the tank employs lip seals around the drive shaft so that... | 02/14/2006 |
| 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 |
| 6932348 | Mechanical sealing device Even high viscosity fluid or slurry-contained fluid can be 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 ... | 08/23/2005 |
| 6928860 | Heat-transfer-inhibiting motor and rotor Heat-inhibition respecting a motor is provided in connection with a heated instrument through a stand-off mount system and/or a heat-inhibiting rotor/stirrer. The instrument can be a hot bath containing instrument where stirring of the contents of the bath can be ca... | 08/16/2005 |
| 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 |
| 6830426 | Gas injection seal system for a centrifugal pump A set of seals is installed on the impeller of a centrifugal pump that allows a low viscosity fluid to be injected into a chamber between the impeller shroud and the casing sidewall. A seal ring, with a number of grooves formed in it is installed on the tip of the i... | 12/14/2004 |
| 6789804 | Dry gas shutdown seal A dry gas seal has a housing with an annularly-shaped channel disposed concentric with the drive shaft, and an inlet to introduce pressurized buffer gas into the housing interior. An annularly-shaped shutdown piston is slidably received in the housing channel for ax... | 09/14/2004 |
| 6726215 | Dynamic pressure seal device and rotary joint device using the same Disclosed are a dynamic pressure seal device and a rotary joint device using the same which are applicable to a rotary body to be rotated at high speed and which are capable of effecting delivery of a target fluid between a rotary side member and a stationary side m... | 04/27/2004 |
| 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 |
| 6685192 | Tandem seal A pair of primary and secondary mechanical seals are arranged tandem in an axial direction around a rotating shaft in a space between the rotating shaft and a housing having a shaft sealing part. The center or intermediate liquid is sealed into a center r... | 02/03/2004 |
| 6666457 | Sealing device for sealing a cavity rotatable about a rotation axis A sealing device for sealing a cavity (40) rotatable around a rotational axis (A) includes at least two sealing areas separated from each other by at least one intermediate zone (Z1 to Z3), two sealing faces (20, 21 to 24, 30, 31 to 33, 41, 71 to 74) cont... | 12/23/2003 |
| 6641140 | Apparatus for retaining lubrication oil at sliding surface of shaft seal device disposed within oil chamber of submersible pump An apparatus for retaining lubrication oil at the sliding surface of a double-type shaft seal device disposed within an oil chamber of a submersible pump. The apparatus prevents lubrication oil from scattering from the center portion of the oil chamber of... | 11/04/2003 |
| 6607348 | Gas compressor To avoid formation of condensate or freezing in the tandem gas seals (12, 13) of a gas compressor (1), such as for use in the compression of production of natural gas, when the compressor is temporarily stopped for maintenance or repair of the compressor ... | 08/19/2003 |
| 6592126 | Mechanical seal leak detector A mechanical seal assembly includes a leak detector mounted thereon for detecting low rates of liquid leakage across the seal rings of the mechanical seal. The leakage detector collects the liquid leakage and includes a fiber optic sensor for detecting th... | 07/15/2003 |
| 6575470 | Non-contacting face seals Non-contacting face seals having sliding rings with grooves formed in the lateral planes thereof. Each groove has inlet and outlet ends, with the traverse cross-section of the groove decreasing from the inlet end to the outlet end. The outlet end of the g... | 06/10/2003 |
| 6565095 | Face seal with internal drain A face seal assembly with internal weep drain is disclosed for use in a turbo-machine, such as a gas turbine engine, for deterring passage of fluids, such as oil and the like, across an interface dividing the turbo-machine into two distinct regions, the i... | 05/20/2003 |
| 6557856 | 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 ... | 05/06/2003 |
| 6508472 | Multi-channel rotary joint A multi-channel rotary joint with which a plurality of fluids of the same or different types can be made to flow as desired, including first connecting spaces sealed by mechanical seals and second connecting spaces sealed by mechanical seals and by elasti... | 01/21/2003 |
