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| Number | Title | Issue Date |
| 8038155 | Magnetically-controlled rotary seal A non-contacting rotary face seal assembly includes a first sealing member, including a first sealing face and a first magnetic element; and a second sealing member, including a second sealing face and a second magnetic element. The first and second magnetic element... | 10/18/2011 |
| 7722050 | Mechanical seal bearing protector A mechanical seal has an axially floating seal face (21) in sliding contact with an axially stationary seal face (22). A biasing means (33), such as a magnet, biases the floating seal face towards the stationary seal face. The axially floating s... | 05/25/2010 |
| 7267186 | Magnetic face seal for rock drill bit bearings A seal assembly for an earth boring bit uses a magnet to provide a desired contact force. The seal is located between a rotating cone and a stationary bearing pin of the drill bit. The seal has a non rotating metal face that is in sliding engagement with a seal face... | 09/11/2007 |
| 6887048 | Liquid pump and sealing mechanism A liquid pump has a sealing mechanism utilizing magnets. The sealing mechanism includes an annular rotating seal attached to the lower surface of a rotary base member fixed to the motor rotating shaft. Additionally, a flexible stationary seal is joined and separated... | 05/03/2005 |
| 6805358 | Magnetic seal The invention herein is a seal to seal a rotating shaft to housing. The seal has a stator and a rotor, magnetically and mechanically coupled. The mechanical couple is provided through an interlocking annular groove provided on one component and a flange face on the ... | 10/19/2004 |
| 6572113 | Seal fitting A seal assembly for co-operation with a shaft comprising a seal member which, in use, in a first position, forms a seal against the shaft, a seal housing for retaining the seal member, means for applying a radially inward force to the seal member and mean... | 06/03/2003 |
| 6220602 | Seal arrangement A seal arrangement (40) between relatively movable components (42,48) includes at least one magnet (54) on a first component (48) and at least one magnet (56) on the second component (42). A clearance (55) is defined between the at least one magnet (54) o... | 04/24/2001 |
| 6142477 | Active seal A seal assembly includes a seal element having a plurality of movable seal segments and further includes a plurality of actuators, each associated with a respective one of the seal segments. Each of the seal segments has a coil that generates electrical e... | 11/07/2000 |
| 5993269 | Connecting pin having electrically conductive magnetic fluid A connector pin which has a structure wherein a pin which can be moved by a spring is kept in contact with a casing by way of connecting member, an electrically conductive magnetic fluid is sustained in the casing, and the casing and the connecting member... | 11/30/1999 |
| 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 |
| 5794487 | Drive system for a robotic arm A robot with a base, a first link connected to the base by a shoulder joint, and a second link connected to the first link by an elbow joint. A shoulder motor drives the shoulder joint, and an elbow motor drives the elbow joint. An upper elbow pulley is c... | 08/18/1998 |
| 5730447 | Self-aligning magnetic rotary seal A magnetic rotary seal is provided for sealing a shaft to a housing, comprising a rotary seal head having a first annular surface; a first O-ring disposed between the rotary seal head and the shaft for sealably coupling the rotary seal head to the shaft; ... | 03/24/1998 |
| 5161804 | Magnetic seal A magnetic seal for rotating shafts having a first and second annular members. Each of the annular members having a source of magnetic force with the lines of magnetic force being axially aligned with the shaft. A stationary insert positioned in said hous... | 11/10/1992 |
| 5078411 | Variable magnetic rotary seal A variable magnetic rotary seal sealingly couples a shaft to a housing as the shaft rotates. The variable magnetic rotary seal includes a seal head, a seal ring and a mating ring. The seal head is formed out of a non-magnetic material. The seal head has a... | 01/07/1992 |
| 5064205 | Active magnetic seal An active magnetic seal for controlling leakage from turbine shafts or other rotating equipment by the inclusion of circumferential electromagnet windings forming a dynamically controllable magnetic gap between the axial borders of rotor and stator elemen... | 11/12/1991 |
| 4795168 | Magnetic seal assembly A magnetic-type end face seal assembly for creating an airtight seal between a housing and a rotatable shaft which projects outwardly through a housing bore. An insert ring of magnetically attractable material surrounds the shaft within the bore, and has ... | 01/03/1989 |
| 4447063 | Shaft seal with positively magnetically controlled sealing gap In a shaft seal having a radial plane seal ring gap and comprising a seal ring rotating with a shaft, and a non-rotating seal ring mounted on a housing of the seal through an element which is elastically yielding in every direction and serves as a packing... | 05/08/1984 |
| 4043619 | Sliding ring seal This disclosure relates to a sliding ring seal for bearings which includes a pair of annular members, a pair of annular rings constructed of metallic material, a flexible non-metallic annular seal, and one or more annular retaining rings of magnetically a... | 08/23/1977 |
