Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7334967 | Method and arrangement by a workover riser connection A slip joint for a riser between a well and a floating petroleum installation, for example an oil platform. The slip joint includes, an outer pipe and an inner pipe, the pipes arranged to enable telescopic movement relative to one another in order to compensate for ... | 02/26/2008 |
| 7314087 | Heave compensation system for hydraulic workover The present invention relates generally to offshore drilling and production operations, and, more particularly, to marine drilling workover/intervention tensioning and compensating devices and methodologies. A heave compensated hydraulic workover device and/or syste... | 01/01/2008 |
| 7287935 | Tendon assembly for mooring offshore structure An offshore system for petroleum production has a buoyant platform. A tendon assembly secures to the platform and extends down to a counterweight located near the lower end. A piling is embedded in the sea floor. A socket at the counterweight telescopingly slides ov... | 10/30/2007 |
| 7231981 | Inline compensator for a floating drill rig An apparatus and method for protecting against the problems associated with heave of a floating drilling rig are disclosed. The disclosed invention is a unique inline compensator in which a plurality of cylinders housed within a tubular housing and a plurality of lo... | 06/19/2007 |
| 7219739 | Heave compensation system for hydraulic workover The present invention relates generally to offshore drilling and production operations, and, more particularly, to marine drilling workover/intervention tensioning and compensating devices and methodologies. A heave compensated hydraulic workover device and/or syste... | 05/22/2007 |
| 7128168 | Reamer apparatus for ground boring machine The invention provides a reamer apparatus for a ground boring machine that is capable of restricting increase in drawing resistance when performing drawing of a buried pipe by using a reamer and of efficiently performing drawing operations of the buried pipe without... | 10/31/2006 |
| 7104329 | Marine bottomed tensioned riser and method A new marine oil production riser system for use in deepwater applications is disclosed. An efficient means for accommodating movements of the host facility, while maintaining riser top tension within the limits for long-term riser performance. Long riser stroke len... | 09/12/2006 |
| 7021675 | Swivel assembly A swivel assembly for use with a water gun mounted on a base or coupled to a water supply conduit to discharge a high velocity stream of water into a mineral stockpile and slurry pit, the swivel assembly comprises a stationary swivel section and a rotatably swivel s... | 04/04/2006 |
| 6634650 | Rotary vacuum-chuck with water-assisted labyrinth seal A rotary vacuum-chuck mounts a substrate such as a silicon wafer for rotation. The vacuum-chuck includes a hollow rotary shaft and a chuck mounted on the hollow rotary shaft and having a surface adapted to support a substrate, the surface having one or mo... | 10/21/2003 |
| 6286541 | Mechanical leak-proof coupling In order to provide a leak-proof coupling for a gas-carrying pipe having two pipe sections that are relatively movable, the coupling includes a first pipe section and a second pipe section that have respective coupling ends disposed in closely spaced adja... | 09/11/2001 |
| 5885450 | Vessel with captive tube support ring A water purifier includes a quick connect connector in a port that receives a tube that carries the water. The tube is received along the axis of the port in a first reference direction along the axis. The connector is assembled by inserting, in sequence,... | 03/23/1999 |
| 5472215 | Rotating high vacuum mercury seal A seal for communicating high vacuum onto rotating machinery such as a ceifuge. The seal comprises an outer pipe defining a volume to be evacuated, an inner pipe connected on one end to a vacuum source with the other end disposed within an end of the out... | 12/05/1995 |
| 5421621 | Packing manifold for slip-type expansion joints A slip-type expansion joint including a body portion for connection to a pipe or conduit and having an inner annular recess for receiving packing rings and injectable packing material and the joint further including a slip portion for connection to anothe... | 06/06/1995 |
| 5226677 | Rotary joint with extended life seal The invention pertains to a rotary joint for use with rotating machinery, such as a dryer drum, where the joint is conveying steam by means of a rotating nipple and sealing structure. The primary elements are a stationary housing comprised of a head, body... | 07/13/1993 |
| 5067753 | Hydrostatically balanced rotary hydraulic connector The fluid-tight coupling is designed for connecting a fixed hydraulic line with a rotary hydraulic line. The fixed line (1) carries on its end an axially movable tubular piston (7) provided with a hemispherical head (8); the rotary line (2) has an offset ... | 11/26/1991 |
| 5058927 | Fluid coupling device A fluid coupling device of non-contact type having a stationary main coupling body and a rotary shaft rotatably supported through bearings to the coupling body and formed with an axial fluid passage extending along a length thereof. A minute space is prov... | 10/22/1991 |
| 4844138 | Automobile tire pneumatic pressure controlling apparatus An automobile tire pneumatic pressure controlling apparatus is disclosed. The automobile includes a vehicle body, vehicle compartment and axle shaft, and the control apparatus comprises a pressure source, a communication passage extending through the axle... | 07/04/1989 |
| 4694859 | Undersea hydraulic coupling and metal seal A coupling and metal seal are disclosed, primarily for use in undersea hydraulic applications. The female member of the coupling is of three-piece construction. The main body portion accepts a cylindrical retainer which is held captive within the body by ... | 09/22/1987 |
| 4667062 | Swivel fitting for electrical conduit and the like A swivel fitting for electrical conduit and the like comprising a first fitting part having an axially extending tubular section and a second fitting part having a generally cylindrical axially extending section disposed in sleeved relationship within the... | 05/19/1987 |
| 4659114 | Rotating pipe joint having a floating seal A floating seal for a rotating pipe joint joins two generally parallel and axially aligned pipes and provides a substantially fluid tight seal between them, while permitting relative rotation of the two pipes as well as limited relative lateral movement o... | 04/21/1987 |
| 4615542 | Telescopic riser joint This invention relates to a joint for risers, and particularly to a telescopic joint suitable for expandably connecting composite-pipe type riser pipes provided internally with tubing pipes. Its structural features reside in that connectors adapted to con... | 10/07/1986 |
| 4449738 | Rotary fluid coupling A rotary fluid coupling for conveying fluid from a stationary shaft to a hub rotatably mounted on the shaft, or vice versa. The coupling is characterized in having a shaft provided with an axial passageway extending therethrough, one end of the passageway... | 05/22/1984 |
| 4412683 | Apparatus for supplying fluid to a rotating tube comprising end cap with purging fluid Apparatus for supplying fluid to a rotary tube uncontaminated with ambient air comprises an end cap having an open ended bore in which an end portion of the tube may be rotatably positioned, a first conduit extending into the end cap through which fluid m... | 11/01/1983 |
| 4369814 | Flexible tubular joint A joint which may be used in a diving suit includes a plurality of annular members each having a piston and cylinder portion which are coupled together whereby the connecting members are connected in series. The piston and cylinder portions define chamber... | 01/25/1983 |
| 4201746 | Apparatus for zone refining Improvements in apparatus for zone refining polycrystalline semiconductor rods to produce monocrystalline semiconductor rods are disclosed. In the apparatus, an inductive heating chamber is employed which has a longitudinal dimension independent of the le... | 05/06/1980 |
| 4094548 | Apparatus for conveying and separating loose material Conveying apparatus for sand, gravel and the like comprises a conveying head at the lower end of a lower pipe portion sealed to and displaceable telescopically relative to an upper pipe portion which is not longitudinally displaceable. An annular interspa... | 06/13/1978 |
| 4077218 | Articulated joint A joint, subject to a pressure differential between inside and outside, having two tubular members flexibly joined by couplings comprising an annular piston sliding within an annular cylinder containing an incompressible fluid, a fluid reservoir connected... | 03/07/1978 |
