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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7914007 | Segmented seal with hydrodynamic feature and assembly A segment of a seal assembly for sealing a higher pressure area against a rotating member is disclosed. The segment may include a radial external surface, a radial internal surface for sealing against a rotating member, a feed cavity, a ramp portion in communication... | 03/29/2011 |
| 7052020 | Hydrodynamic rotary seal A hydrodynamically lubricating rotary seal for partitioning a lubricant from an environment has a generally circular seal body, a sloping dynamic sealing lip, and an energizer. The dynamic sealing lip is provided for establishing compressed sealing relation with a r... | 05/30/2006 |
| 6896269 | Reverse pressure actuated seal A seal for a hydraulic cylinder rod is provided. The seal includes a main body that defines an opening therein. The seal includes an inner surface and an outer surface. A first radial face having a generally planar surface extends from the inner surface to the outer... | 05/24/2005 |
| 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 |
| 6502823 | Actuating seal carrier for a turbine and method of retrofitting A seal assembly is provided for a rotary machine wherein the rotary machine comprises a rotor and a casing. The rotor comprises a generally longitudinally-extending axis wherein the casing is generally coaxially aligned with the axis. The casing circumfer... | 01/07/2003 |
| 6439578 | Sealing ring combination Two axially abutting individual rings (4, 5) arranged in a shared casing recess (3) at the passage (6) of a component (2) to be sealed, which each is formed of several ring segments (4', 5') pressed against the component (2) to be sealed by a common perip... | 08/27/2002 |
| 6338490 | Sealing arrangement with automatic clearance adjustment The seal is composed of butt-jointed segments (1) in which the bearing surface (18) on a rotating part (2) subject to wear, includes a hollow chamber (20) communicating through calibrated orifices (22) with a high pressure containment (8). Therefore, it f... | 01/15/2002 |
| 6145843 | Hydrodynamic lift seal for use with compressible fluids This invention discloses a completely different hydrodynamic gas seal configuration from both the Rayleigh bearing and other prior art. Instead of the shallow, wide, and short single pocket geometry for the Rayleigh bearing, and instead of the multiple de... | 11/14/2000 |
| 6120036 | Extrusion resistant hydrodynamically lubricated rotary shaft seal A hydrodynamically lubricated interference type rotary shaft seal suitable for environmental exclusion and high pressure lubricant retention which incorporates composite multiple modulus construction and a non-planar flexible environmental edge heel geome... | 09/19/2000 |
| 5738358 | Extrusion resistant hydrodynamically lubricated multiple modulus rotary shaft seal A hydrodynamically lubricated interference type rotary shaft seal suitable for environmental exclusion and high pressure lubricant retention which incorporates composite multiple modulus construction and a non-planar flexible environmental edge heel geome... | 04/14/1998 |
| 5558341 | Seal for sealing an incompressible fluid between a relatively stationary seal and a movable member A seal structure is provided having a configuration with a very small seal gap between a relatively stationary seal member and a complementary surface on a movable (rotatable) member (such as a rotating shaft) adjacent to which the stationary seal member ... | 09/24/1996 |
| 5145189 | Hydro-lift dynamic circumferential seal A hydro-lift seal for the bore region of a seal segment having a shallow groove inlet on the high pressure side of the seal segment. The shallow groove inlet is aerodynamically connected to a shallow groove which extends in the direction of rotation of a ... | 09/08/1992 |
| 5100158 | Compliant finer seal A seal for inhibiting the flowing of a gas or liquid in the stream along a shaft within a machine housing, the shaft having an axis of rotation in a predetermined radius, the seal comprising a seal housing attached to the machine housing, and a plurality ... | 03/31/1992 |
| 4971306 | Seals for cylindrical surfaces A shaft seal for sealing fluids includes a rotating shaft means having an axis and an external cylindrical surface. A seal ring is disposed about the shaft and has an internal cylindrical surface juxtaposed to the external cylindrical surface and mating t... | 11/20/1990 |
| 4744721 | Turbopump sealing device A turbopump sealing device is mounted in a case concentric with the rotary shaft between the turbine and the pump, the case defining a cavity for pressurizing gas, defined on the turbine side by a bearing ring which is integral therewith, in contact with ... | 05/17/1988 |
| 4257617 | Shaft seal assembly A shaft seal assembly comprises contact seal rings which are inserted into a recess formed within labyrinth seal rings encompassing the shaft. The contact seal rings are adapted to be in sealing engagement with the shaft when the shaft is not rotating or ... | 03/24/1981 |
| 4082296 | Seal for sealing between a rotating member and a housing A seal for sealing between a rotating member and a housing comprises a seal ring mounted for movement towards and away from the rotating member and having a high pressure side, a low pressure side, and a face opposed to the rotating member. Resilient mean... | 04/04/1978 |
