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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 5110447 | Process and apparatus for partial upgrading of a heavy oil feedstock The invention involves visbreaking heavy oil under mild conditions in a vertical vessel containing a vertical elongate ring spaced inwardly from the vessel wall to form an outer open-ended annular chamber and an inner open-ended soak chamber. Heavy oil at... | 05/05/1992 |
| 5074358 | Surfactant-stabilized foams for enhanced oil recovery A foam is provided for use in a subterranean oil-bearing formation for reducing and controlling the mobility of a gaseous drive fluid. The foam is generated using an inert gas and a fluorocarbon surfactant solution in admixture with an amphoteric or anion... | 12/24/1991 |
| 4974653 | Tire traction device The device includes a flat rigid rectangular frame forming a pair of opposed parallel sleeves. Four traction elements, each having shank and U-shaped hook portions, are provided for telescoping movement of the shanks within the sleeves, to thereby positio... | 12/04/1990 |
| 4967790 | Swing check valve A gravity closed swing check valve is provided in which the downstream surface of the solid clapper is semi-spherical and convex. The body of the valve forms a concave semi-spherical cavity. The radii of the clapper and cavity surfaces is the same. The cl... | 11/06/1990 |
| 4909730 | Flame arrester having detonation-attenuating means A flame arrester for a pipe line is provided comprising a detonation attenuator mounted within the arrester chamber between the quenching element and the backflash flame inlet. The attenuator is generally cup-shaped, aligned with the inlet, of greater dia... | 03/20/1990 |
| 4890482 | Method and apparatus for measuring fluid viscosity A transient flow capillary viscometer is provided for establishing a measure of the viscosity of a highly viscous test fluid. More particularly, a capillary tube filled with the test fluid is provided. The viscometer relies upon inducing a step change in ... | 01/02/1990 |
| 4885044 | Method of controlling hardness of pipe weld-joints by radially inserting insulating rings prior to tempering heat-treatment A process is provided for heat treating an annular martensitic heat-affected zone. The heat-affected zone is commonly created in the outer segment of a pipeline wall as a result of applying a circumferential fillet weld to the pipe. The embrittled zone cr... | 12/05/1989 |
| 4870866 | Ultrasonic method for measuring internal contact pressure between mating solid parts separated by a liquid film A method is provided for directly measuring the contact pressure on the mating interfaces of two solids undergoing compression where the interfacial region contains an entrapped film of liquid. An acoustic pulse is directed at either interface. A referenc... | 10/03/1989 |
| 4863009 | Control system for an endless belt conveyor train A system is provided for controlling the feed rate of material being loaded onto a conveyor train of variable configuration to prevent overloading. The system involves monitoring the power drawn by the various drive motors of the train to establish which ... | 09/05/1989 |
| 4844752 | Process for making internally hardened tubes The present invention relates to a process for hardening the interior surface of a long, thin-walled, small inside diameter, tubular member, such as a tube which would be used to form a downhole pump barrel. More particularly, it relates to a process invo... | 07/04/1989 |
| 4808234 | Cleaner assembly for air filters As a preliminary step, the dirty filter is dried to remove substantially all moisture from the dust on the filter. The filter is then spun in a closed cabinet. Simultaneously, a jet of pressurized air is reciprocated in close proximity along the inner sur... | 02/28/1989 |
| 4806058 | Material handling device The device is operative to discharge the triangular ridge of grain, which remains in the bottom of a cylindrical storage bin after the bulk of the bin contents has been discharged by gravity through a central outlet in the bin floor. The device comprises ... | 02/21/1989 |
| 4793829 | Permeation process for separating ammonia from a gas mixture A process is provided for separating ammonia from an ammonia synthesis purge gas stream containing ammonia, hydrogen, and contaminant gases. The process involves introducing the gas stream into a permeator equipped with a polysulphone amide gas separation... | 12/27/1988 |
| 4783268 | Microbubble flotation process for the separation of bitumen from an oil sands slurry An improvement is provided to the known hot water process for extracting bitumen from mined oil sand. More particularly, a methodology is provided for the production of microbubbles of air, and it has been found that the so-produced microbubbles can be us... | 11/08/1988 |
| 4747430 | Process and apparatus for sleeve repair of pipe line A longitudinally split cylindrical sleeve, consisting of two half shells, is applied to an internally pressurized pipe, to reinforce a section of the pipe wall weakened by an internal or external defect. One pair of adjacent shell ends are first welded to... | 05/31/1988 |
| 4711746 | Process for welding thermoplastic by injection A device is provided for forming a plastic weld, to repair a crack in a plastic article or join two plastic parts. The device comprises a barrel having an internal chamber. A nozzle is part of the barrel and forms a restrictive orifice outlet. Plastic fil... | 12/08/1987 |
| 4675138 | Process for the manufacture of a corrugated wafer board panel A platen assembly is provided having a working surface which can be mechanically converted between planar and corrugated configurations. A mat of wood wafers coated with thermosetting resin binder is deposited between upper and lower, spaced apart platen ... | 06/23/1987 |
| 4674954 | Wind turbine with damper A double-acting hydraulic cylinder is pivotally mounted between the head and tail assemblies of a wind turbine, to act as a damper. The cylinder is connected with a hydraulic fluid reservoir container. Means, such as restrictive orifices, are provided to ... | 06/23/1987 |
| 4642223 | Method for removing spent catalyst from a reactor tower and assembly for facilitating same A basket is removably inserted in the upper end of each drain tube in those interbed assemblies of a catalytic tower whose catalyst beds are to be removed upwardly by vacuuming. The basket has a grid for a bottom wall, so that catalyst particles thereabov... | 02/10/1987 |
| 4634040 | Process for welding pipe ends and an insulating ring therefor An improvement is provided in a known process for welding liquid-filled aligned end sections of pipe. The known process involves positioning a sleeve over the junction between the pipe ends and fillet welding the two ends of the sleeve to the pipe ends. T... | 01/06/1987 |
| 4624071 | Herbicide applicator A herbicide applicator, of the wiping type, comprises an elongate loop of flexible, solid wick material extending along and depending freely from a vertically adjustable frame member. The loop is suitably formed of polypropylene carpeting. Deployed within... | 11/25/1986 |
| 4623203 | Commutator A stepping commutator is provided for supplying power to a plurality of electrode plates mounted on a rotating shaft. The commutator comprises a central annular plate which is fixed to the shaft. The plate has a ring of cylindrical stationary contacts mou... | 11/18/1986 |
| 4623442 | Apparatus for continuously separating particulate solids from liquid suspensions A clarifier is provided for simultaneously treating a plurality of bodies of liquid-solid suspension in a vertically stacked fashion, with the aim of separating the particulate solids from the liquid, by process steps involving a combination of electropho... | 11/18/1986 |
| 4621690 | Sucker rod coupling An improved sucker rod coupling is provided for use in a rod string in a pumping oil well. An elongate, cylindrical body member is utilized. This member has internally threaded, longitudinal bores at each end thereof, for connection with the sucker rods w... | 11/11/1986 |
| 4584884 | Torque sensor The sensor comprises a pair of shafts mounted end to end for rotation within a stationary housing. The adjacent ends of the shafts are spaced apart by a thrust bearing so that axial force can be transmitted from the first shaft, connected to motor means, ... | 04/29/1986 |
| 4581843 | Foot snare live trap A trap having an eye is provided on the free end of the upper arm. A cable is secured to the free end of the lower arm and extends through the eye, so as to be slidably connected with the end of the upper arm. A slip noose is formed at the free end of the... | 04/15/1986 |
| 4581919 | Retrievable hydrostatic testing tool for pressure testing tubing In common with conventional testing tools for this purpose, the present tool incorporates a central mandrel carrying a pair of vertically spaced packers which are expandable by fluid pressure, which mandrel forms a longitudinal bore having an outlet commu... | 04/15/1986 |
| 4549432 | Metering separator for determining the liquid mass flow rate in a gas-liquid oilfield production stream The separator accepts both the casing annulus and tubing production streams issuing from an in situ combustion project production well. Most of the gas in the flow is first separated from the liquid and solids, by centrifugal action. This gas is removed f... | 10/29/1985 |
| 4546954 | Engine air cut-off valve The valve comprises a two-piece housing consisting of a body and a flat cover. The body is milled out to define a working chamber. A port extends through the body wall to communicate with the chamber; a second port extends through the cover wall. The two ... | 10/15/1985 |
| 4545892 | Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand The primary tailings and middlings are combined and fed to a vessel having the general form of a deep cone thickener. The feed is deflected outwardly and generally horizontally by a baffle, as it is delivered to the vessel. Simultaneously, the outwardly r... | 10/08/1985 |
| 4501648 | Electrophoretic process for separating aqueous mineral suspensions An aqueous suspension of fine mineral solids, for example oil sand tailings sludge, is separated into separate solid and liquid components by first chemically conditioning the suspension with the addition of lime, and thereafter passing an electrical pote... | 02/26/1985 |
| 4494291 | Apparatus for constructing cylindrical storage tanks An apparatus is provided for constructing cylindrical storage tanks from coiled strip steel. The apparatus carries and delivers the coiled strip steel circularly around the base of the tank. The strip steel is aligned and affixed with the overhead tank by... | 01/22/1985 |
| 4489828 | Device for splicing cable ends A steel connector for joining the steel cable ends of a conveyor belt is provided. The connector comprises a pair of tubular sleeves--one of which is slipped onto each cable end. Each sleeve has a bore having an inner section of reduced diameter relative ... | 12/25/1984 |
| 4487264 | Use of hydrogen-free carbon monoxide with steam in recovery of heavy oil at low temperatures A process for recovering oil from a subterranean heavy oil-containing reservoir is provided, wherein steam and carbon monoxide are injected into the reservoir at a temperature less than about 260° C. At these low temperatures, the steam and hydrogen-free... | 12/11/1984 |
| 4469803 | Regeneration process for poisoned Claus alumina catalyst, including NaOH activation Poisoned catalyst is regenerated by first subjecting it to an oxidative burn-off and then soaking it in a base, preferably NaOH. The dried product is comparable in Claus activity to fresh catalyst.... | 09/04/1984 |
| 4462892 | Control of process aid used in hot water process for extraction of bitumen from tar sand The hot water process is sensitive to the nature of the tar sand feed, which varies. An alkaline process aid, usually NaOH, is normally added to the conditioning step of the process and is needed to obtain good bitumen recovery from most tar sand feeds. T... | 07/31/1984 |
| 4458759 | Use of surfactants to improve oil recovery during steamflooding An improvement is provided in an in situ steamflooding process for recovering oil from a subterranean, heavy oil-containing reservoir. An organic sulfonate surfactant, for example a petroleum sulfonate surfactant, is injected with the steam into the reser... | 07/10/1984 |
| 4457366 | Wiper device for stripping fluid from well pipe A wiper device is provided comprising a container having a central opening through which the well string may pass. A pair of opposed wiper pads disposed in a horizontal attitude are mounted in spaced vertical relationship within the container for longitud... | 07/03/1984 |
| 4448004 | Channel and cut-out structure for removeable partition wall An improvement is provided in a removeable partition wall system wherein gypsum board panels, having suspension assemblies attached thereto, are suspended from horizontal channel support members extending through cut-outs formed in the webs of vertical ch... | 05/15/1984 |
| 4438218 | Catalyst for sulphur removal from hydrocarbons A novel catalyst is provided which is effective in removing at least a portion of the sulphur contained in hydrocarbons, without the use of an external hydrogen source. The catalyst is a sulphided mixture, on a catalyst support, of (a) a sulphide of one o... | 03/20/1984 |
