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| Number | Title | Issue Date |
| 4942933 | Relating to rotary drill bits A rotary drill bit for use in drilling or coring holes in subsurface formations comprises a bit body having a shank for connection to a drill string, a plurality of cutter assemblies mounted at the surface of the bit body, and a passage in the bit body fo... | 07/24/1990 |
| 4928031 | Pressure/temperature compensated transducer pad assembly The present invention is directed to a device which simply and efficiently compensates for changes in the volume of a fluid trapped in a fluid-filled cavity between two relatively immovable housings and an elastomeric seal ring. The present invention is p... | 05/22/1990 |
| 4920626 | Stabilized connector flange for interconnecting an instrument manifold with an orifice plate assembly Improved methods and apparatus are provided for structurally interconnecting an instrument manifold with a differential pressure assembly having a pair of tapered NPT threaded outlet ports each adjoining an exterior body surface. First and second connecto... | 05/01/1990 |
| 4907828 | Alignable, threaded, sealed connection The present invention is directed to an apparatus and method for assembling, aligning and securing a sealed connection. The apparatus and method of the present invention advantageously employ the mechanical leverage of a threaded connection, preferably sq... | 03/13/1990 |
| 4900159 | High shear mixing apparatus An apparatus for high shear mixing of material comprising a hub having a rotation axis, a flange attached to the hub and extending radially outwardly therefrom, an impeller operatively attached to the hub for rotation therewith and axially spaced from the... | 02/13/1990 |
| 4899483 | Weedless hook A fishing hook includes a guard for preventing weeds from inadvertently snagging or contaminating the hook, while enabling the guard to flex toward the shank of the hook to catch a fish. The flexible sheet-like metallic guard is secured at one end to the ... | 02/13/1990 |
| 4899775 | Corrosion-resistant overlay for the edge of butterfly valves An overlay for a valve disk of a butterfly or similar valve is formed from a strip of corrosion-resistant material. The strip is preferably profiled to conform to the edge of the disk and has an overall length less than the circumference of the disk. Both... | 02/13/1990 |
| 4898252 | Cutting structures for rotary drill bits A cutting structure for a rotary drill bit includes a cutting element 30 having a front layer 32 formed of polycrystalline diamond, bonded to a backing layer 33 formed of tungsten carbide. The cutting element is bonded to a carrier 33 which is formed of a... | 02/06/1990 |
| 4893678 | Multiple-set downhole tool and method A downhole tool is provided suitable for multiple setting and unsetting operations in a well bore during a single trip. The downhole tool is suspended in the wellbore from a tubing string, and is activated by dropping a metal ball which plugs the passagew... | 01/16/1990 |
| 4894534 | Logging apparatus and method Downhole measuring apparatus includes a gamma radiation source and at least two pairs of radiation detectors carried by a housing so that radiation may be emitted from the source and scattered by the environment of the housing and detected by the detector... | 01/16/1990 |
| 4894123 | High efficiency water distiller A highly efficient distillation unit is provided for heating water and condensing the generated steam to remove the contaminants from the water. Efficiency is enhanced by providing a compact air cooled fin-and-tube heat exchanger which removes heat from t... | 01/16/1990 |
| 4894042 | Flip-over toy vehicle A toy vehicle that has a vehicle body, a spring or inertia wheel motor, driven and non-driven wheels, and a spring loaded flip-over device operable by a non-driven wheel of the vehicle. The flip-over device is movable from a first to a second position to ... | 01/16/1990 |
| 4892999 | Calculator A see-through calculator or memory device comprises a transparent base, a see-through printed circuit board and a transparent switch panel. Liquid is housed in a cavity in the base, formed by welding to the base a panel above a recess in the base.... | 01/09/1990 |
| 4892170 | Portable ladder assembly A portable ladder assembly comprises a base, a supporting bracket, and a single rail ladder. The ladder assembly is particularly well suited for safely allowing human entry into a chamber with a confined area entry, such as a conventional manhole. The bas... | 01/09/1990 |
| 4890645 | Rotary shear seal hydraulic valve A rotary shear seal hydraulic valve which can be used in three- and four-way embodiments is formed by a housing and a body together defining therebetween a generally cylindrical stepped cavity in which a rotor is rotatably positioned. The housing contains... | 01/02/1990 |
| 4889017 | Rotary drill bit for use in drilling holes in subsurface earth formations A rotary drill bit for use in drilling holes in subsurface earth formations comprises a bit body having a shank at one end for connection to a drill string and an operating end face at the other end. A plurality of first cutting structures, each comprisin... | 12/26/1989 |
| 4883958 | Interface for coupling liquid chromatography to solid or gas phase detectors Improved techniques are provided for interfacing liquid chromatography with gas phase and solid phase detectors. Heated liquid effluent including sample solute of interest and solvent is sprayed into a desolvation chamber, where controlled vaporization of... | 11/28/1989 |
| 4880067 | Apparatus for drilling a curved borehole A non-rotating drill string is formed from a plurality of independent, cylindrical sections pivotally connected together by a latch mechanism. The adjacent ends are partially beveled such that the sections can bend in a single direction. Means are disclos... | 11/14/1989 |
| 4880025 | BOP control system and methods for using same A BOP subsea control system utilizes hydraulic control of non-critical functions, and electro-hydraulic control of selected critical functions, such as the closing mode of one or more shear ram BOPs, one or more pipe ram BOPs and one or more annular type ... | 11/14/1989 |
| 4878403 | Manufacture of rotary drill bits In the manufacture of a bit body by a powder metallurgy process, a hollow mold is formed in the configuration of at least a portion of the outer surface of the bit body, and elongate pockets of generally V-section are then formed in the interior surface o... | 11/07/1989 |
| 4873895 | Manufacture of rotary drill bits There is provided a method of manufacturing a rotary drill bit of the kind including a plurality of cutting structures mounted in sockets in the bit body and projecting from the face of the bit. The method comprises providing a clearance between each cutt... | 10/17/1989 |
| 4874047 | Method and apparatus for retaining roller cone of drill bit An improved apparatus and method for rotatably mounting and retaining a rock bit roller cone on a journal of a drill bit is disclosed. The bit body has at least one depending leg with an outer free end and an inner end continuous with the remainder of the... | 10/17/1989 |
| 4867418 | Apparatus for increasing the load handling capability of support and manipulating equipment A method and apparatus for increasing the load handling capacity of a system, having at least one fluid driven compensating means, incorporates a booster fluid actuated piston cylinder assembly interconnecting portions of the compensating system so as to ... | 09/19/1989 |
| 4867453 | Golf club grip A golf club having a head, a shaft and a grip, the grip being provided with a shoulder which forms an abutment surface against the outer surface of the little finger of the upper hand of the user using a conventional golf grip, the abutment surface being ... | 09/19/1989 |
| 4867944 | Method of preventing corrosion by contaminated cooling tower waters A method of inhibiting corrosion in cooling tower systems comprising adding to a cooling tower water containing sulfides, hydrocarbons or mixtures thereof as contaminants a corrosion inhibiting composition containing a water-soluble zinc compound, a water... | 09/19/1989 |
| 4865136 | Pressure relief valve for roller bit A one-way pressure relief valve assembly is provided for venting the lubricant reservoir of a roller-type well drilling bit. The valve assembly is mounted in the cap of the lubricant reservoir, to open outwardly, and is adapted to provide hydrostatic load... | 09/12/1989 |
| 4862910 | Check valve with disc centering device The check valve includes a disc-shaped closure member mounted to the valve body for sealing engagement with an annular seat in the valve body. A stem is rotatably mounted to the valve body so that the closure member can swing into and out of engagement wi... | 09/05/1989 |
| 4862754 | Portable piston style sample cylinder A piston-type portable sample cylinder is provided suitable for obtaining and transporting a liquified petroleum gas sample taken from a flow line. A piston slidable in a cylinder creates an increasing volume for the sample, and displaces an opposing iner... | 09/05/1989 |
| 4863331 | Method of making half-binding hard covers for books and a machine for the implementation thereof In order to form a hard book binding having a middle covering and two side coverings, a unitary covering is first formed by securing the side coverings onto the middle covering; thereafter, a spine member and two coverboard members are attached, in mutual... | 09/05/1989 |
| 4863175 | Game apparatus and method The present invention is directed to a goal assembly and game apparatus and to a method of playing a game therewith. The goal assembly includes a scoring port disposed substantially horizontally and above a hard playing surface. The scoring port is dispos... | 09/05/1989 |
| 4864129 | Logging apparatus and method A method of calibrating a radiation detector, positioned in apparatus including a source of gamma radiation such that the detector may sense radiation from the environment of the apparatus due to radiation emitted by the source and scattered by the enviro... | 09/05/1989 |
| 4862977 | Drill bit and cutter therefor An elongate cutter for a drag-type drill bit includes a stud defining one end thereof and a cutting formation comprising a cutting face generally adjacent the other end. Length extends from one end to the other, depth extends generally transverse to the c... | 09/05/1989 |
| 4860995 | Valve element for use in pumps for handling fluids containing abrasive materials A valve element for use in a high pressure pump, the valve element having a body portion with a top side and a bottom side, a guide means attached to and projecting away from the bottom side of the body portion and an insert secured to the top side of the... | 08/29/1989 |
| 4858861 | Clamp-type pipe shoe and method An improved pipe shoe is provided for permanently supporting a length of insulated pipe above a pipe rack of the type used in industrial facilities. The pipe shoe includes a base member for sliding engagement with the pipe rack, a first clamp member inclu... | 08/22/1989 |
| 4857006 | Quick change electrical coupling An electrical coupling is provided suitable for interconnecting multiple conductors between first and second downhole tools, such as logging tools. The male and female coupling bodies are sealed from the environment such that the mated connector and the c... | 08/15/1989 |
| 4854868 | Dental articulator A dental articulator has an anterior post having a C-shape to provide visual access to the front teeth. The upper and lower members of the articulator have dove-tail members for slidably receiving cup-like model carriers. The cup-like model carriers have ... | 08/08/1989 |
| 4855870 | Assemblies for supporting electrical circuit boards within tubes The present invention is directed to an assembly for supporting an electrical circuit board within a tube. The assembly comprises a circuit board, an elongated support spine extending longitudinally along the tube and supporting the circuit board and a sh... | 08/08/1989 |
| 4852840 | Clamp for mounting a device to a tubular An improved clamp for mounting a device, such as a theater lighting fixture, to a structural tubular is provided. The clamp includes a main body securable to the device to be mounted. A jaw is pivotally connected to the main body and moves from an open po... | 08/01/1989 |
| 4851133 | Method and apparatus for recovering low density liquids in surface water An improved skimmer is provided for recovering hydrocarbons floating on the surface of a body of water. A floating hull defines first and second tunnels, and a holding tank for housing the collected hydrocarbons. A power driven propeller in the first tunn... | 07/25/1989 |
| 4848144 | Method of predicting the torque and drag in directional wells A method is provided for generating an improved torque-drag model for at least the collar portion of the drill string in a directional oil or gas well. The technique of the present invention determine the stiffness of incremental portions of the drill str... | 07/18/1989 |
