Patents Represented by Law Firm Pravel & Wilson
  • Patent number: 4159810
    Abstract: A cassette re-winding device including a compartmented housing having a hinged lid to receive a cassette in one compartment having a rewind spindle connected to a battery operated motor located in the other compartment; and, an automatic switch positioned in the first-mentioned compartment which is actuated by the positioning of a cassette in the compartment.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: July 3, 1979
    Assignees: Trevor Hodkinson, Control Switchboards Pty, Ltd., Neil Charles McCormack
    Inventor: Trevor Hodkinson
  • Patent number: 4156421
    Abstract: Method and apparatus for producing a thermal vapor stream for injecting into a subterranean formation for the recovery of liquefiable minerals therefrom, including a pressure vessel containing a high pressure combustion chamber for producing a heating gas for introduction into a heating gas injector. The heating gas injector is partly immersed in a steam generating section of the pressure vessel such that the heating gas is passed through the steam generating section to produce steam and combustion products which are directed between the pressure vessel and the combustion chamber for simultaneously cooling of the combustion chamber by further heating of the steam and combustion gases.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: May 29, 1979
    Assignee: Carmel Energy, Inc.
    Inventors: Robert R. Cradeur, John S. Sperry, Richard W. Krajicek
  • Patent number: 4155403
    Abstract: A subsurface earth formation or petroleum reservoir, either previously or presently producing petroleum hydrocarbons, such as oil and natural gas, is analyzed. From production data, the actual fluid flux of the hydrocarbons to each well penetrating the formation is obtained. By analyzing the actual fluid flux in the formation, areas in the formation where little if any hydrocarbon flow occurred are located. The areas so located are likely to contain dormant oil, which may be produced by new wells.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: May 22, 1979
    Inventor: William Hurst
  • Patent number: 4152129
    Abstract: A method is disclosed whereby carbon dioxide and methane in a gaseous mixture can be separated with little energy consumption when the gaseous mixture contains large amounts of carbon dioxide, i.e., from about 30 to about 90 mol percent. The method involves the fractionation of the gas mixture at a pressure below the critical pressure of the mixture and at a temperature above the triple point temperature of the mixture.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: May 1, 1979
    Assignee: Trentham Corporation
    Inventors: Harold L. Trentham, Arnold M. Hegwer
  • Patent number: 4148445
    Abstract: Flexible pipe used to supply water to remotely located drilling rigs, typically made from a suitable synthetic resin such as polyethylene, is laid and retrieved from spools or reels mounted with a vehicle as the vehicle is moving. The vehicle may be a truck or a trailer drawn by a truck or tractor. Guiding structure is provided on the vehicle to facilitate loading and unloading of the pipe from the reels.
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: April 10, 1979
    Assignee: Midland Tank Rental Company
    Inventors: John L. Reynolds, Jack L. Sappington, Lawrence J. Sullivan
  • Patent number: 4130076
    Abstract: A single point mooring apparatus for loading a tanker from a sub-sea source including surface and submerged flotation chambers connected by a hollow mooring line which has its lower end releasably connected to a permanent pile anchor in the ocean bottom. Flexible flowlines are connected to the surface buoy for transferring fluids to the ship and a ship mooring hawser is connected from below the surface for securing the ship to the mooring apparatus.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: December 19, 1978
    Assignee: Vetco, Inc.
    Inventor: Ben H. van Bilderbeek
  • Patent number: 4127990
    Abstract: A new and improved method for forming a drainage structure, such as a manhole for a subterranean sewer pipe. In a first embodiment, a removable outer form is positioned in an excavation in the earth extending to the sewer pipe so that the earth surrounding the sewer may be undercut and removed through the removable outer form. Concrete is poured into the undercut area surrounding the sewer pipe to a height adjacent the lower edge of the outer form and a second cylindrical inner form is positioned within the outer form so that concrete may be poured into the space between the forms to form upwardly extending wall portions to the surface. In a second embodiment, the outer form is positioned in an excavation at a predetermined location and a concrete base portion is formed. The inner form is positioned in the outer form and predetermined quantities of sand are poured into the space between the forms for facilitating connection with sewer pipes.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: December 5, 1978
    Inventor: Otis L. Morrow
  • Patent number: 4127780
    Abstract: Apparatus for indicating the concentration of a particular constituent in a fluid including a sensing device for sensing the concentration of a particular constituent in a fluid and for providing a response; and an electronic device including a differentiating circuit for differentiating an electrical input signal which is proportional to the sensing response for providing a substantially constant output signal which is a measure of the sensing response differentiated with respect to time, which output signal is an indication of the concentration of the constituent in the fluid. The sensing device is operated during a sampling period in which the reaction of such constituent to the sensing device is linear.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: November 28, 1978
    Inventor: Charles L. Kimbell
  • Patent number: 4120418
    Abstract: A method for producing a barrier in a thermally insulated container lined with polyurethane foam for storage or transport of liquefied gases, wherein a plurality of layers of an epoxy resin formulation and a glass-fiber material are applied in a particular sequence resulting in a barrier of superior quality essentially free of pinhole flaws.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: October 17, 1978
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: Michael H. Collins, Jeremy D. Le Hardy Guiton
  • Patent number: 4120410
    Abstract: An apparatus and method for the supply of pressurized fuel powder to a pressurized reactor, comprising the steps of, and apparatus for, supplying powder to a vessel with a centrifugal pump to inject powder into the vessel by centrifugal force, and maintaining a supply of powder from outside the vessel to the pump.
    Type: Grant
    Filed: July 27, 1977
    Date of Patent: October 17, 1978
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventor: Maarten J. van der Burgt
  • Patent number: 4118925
    Abstract: A new and improved method and apparatus for burning a hydrocarbon fuel for producing a high pressure thermal vapor stream comprising steam and combustion gases for injecting into a subterranean formation for the recovery of liquefiable minerals therefrom, wherein a high pressure combustion chamber having multiple refractory lined combustion zones of varying diameters is provided for burning a hydrocarbon fuel and pressurized air in predetermined ratios injected into the chamber for producing hot combustion gases essentially free of oxidizing components and solid carbonaceous particles. The combustion zones are formed by zones of increasing diameters up a final zone of decreasing diameter to provide expansion zones which cause turbulence through controlled thorough mixing of the air and fuel to facilitate complete combustion.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: October 10, 1978
    Assignee: Carmel Energy, Inc.
    Inventors: John S. Sperry, Richard W. Krajicek, Robert R. Cradeur
  • Patent number: 4118850
    Abstract: A metal forming apparatus and method which uses the apparatus for closing the metal shell at a corner of a double jacketed gasket assembly. The apparatus includes a roller hammer means having a metal forming tool rotatably mounted eccentrically in a power-driven rotating tool holder mount for free rotation of the tool relative to the rotating tool holder upon engagement of the tool with a gasket shell. The eccentric mounting provides a reciprocating hammering motion to the tool and the free rotation allows the tool to roll along the gasket shell during engagement to avoid tearing of the gasket shell.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: October 10, 1978
    Assignee: Lamons Metal Gasket Company
    Inventors: A. B. Owen, Bruce M. Gifford, Horst H. Bahl, Lewis F. Akins
  • Patent number: 4117312
    Abstract: An electrical heating cable which limits power output once an established temperature limit is reached. The cable includes a high-resistance element and a temperature-sensitive variable resistance element electrically connected in series between two electrical conductors otherwise insulated from each other by insulating material. The temperature-sensitive resistance undergoes a substantial positive increase in resistivity when the temperature of the cable nears the established temperature limit. The increase in resistivity substantially reduces the heat-generating current flowing in the cable to limit the power output.
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: September 26, 1978
    Assignee: Thermon Manufacturing Company
    Inventors: Ben C. Johnson, J. Scott Thornton, Donald E. Glowe, Patrick E. Cassidy, Robert E. Anderson
  • Patent number: 4114419
    Abstract: A method of testing an analyzer to determine the accuracy thereof and a volumetric primary standard apparatus for doing same, the method of which includes flowing a carrier gas stream at a known flow rate, periodically injecting a measured quantity of sample gas at a selected interval into the carrier gas stream, homeogeneously mixing the carrier gas and the sample gas therewith in a mixing chamber for providing a homogeneous mixture of sample gas and carrier gas and thereafter flowing the homogeneous mixture into an analyzer whose accuracy is to be tested.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: September 19, 1978
    Inventor: Charles L. Kimbell
  • Patent number: 4114618
    Abstract: A catheter assembly insertable into a blood vessel for directing medicinal fluids intravenously into the vessel while providing for substantially uninterrupted flow of blood through the vessel; and, an anchoring flap mountable onto the catheter assembly or any other catheter for anchoring such catheters in a variety of positions.
    Type: Grant
    Filed: December 15, 1976
    Date of Patent: September 19, 1978
    Inventor: Jorge J. Vargas
  • Patent number: 4114201
    Abstract: The present invention pertains to a ventilated head cover having a plurality of openings in the crown and also between the brim of the head cover and the sweatband and/or between the sweatband and the wearer's head to permit air to freely circulate up into and out of the crown to cool the head of the wearer. Further, the openings in the crown are shaded with an overhanging or outwardly projecting bill or bills which extend outwardly to provide a shade or sunlight barrier to exclude direct sunlight from the wearer's head.
    Type: Grant
    Filed: May 12, 1977
    Date of Patent: September 19, 1978
    Inventor: Harold K. Garrison
  • Patent number: 4113332
    Abstract: A secret compartment case having a flexible housing, an inner drawer and an outer drawer, the flexible housing having a release member formed therewith for operatively connecting the inner drawer with the housing, the inner drawer being releasable from the housing to allow movement from a secured to an unsecured position when the outer drawer is moved from the shut position.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: September 12, 1978
    Inventor: James David McMaster
  • Patent number: 4113901
    Abstract: A method of manufacturing a heat-insulating polyurethane foam lining of a container having a rigid outer shell with flat inner wall surfaces that intersect to form corners of the container for transport or storage of liquefied gases is disclosed. The flat inner surfaces of the rigid outer shell of the container located in both sides of a corner of the container are covered with polyurethane foam by spraying layers of polyurethane foam onto the surfaces and on top of each other. The end parts of the layers of polyurethane foam which are located adjacent to the corner at the intersection of two surfaces are cut or ground to form a gap defined by substantially flat planes adjacent to the corner. A thin layer of a sealing material is then applied onto the flat planes of the gap and allowed to set. The sealing material may be either an epoxy resin formulation or a polyurethane resin formulation.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: September 12, 1978
    Assignee: Shell Internationale Research Maatschappij, B.V.
    Inventor: Michael H. Collins
  • Patent number: D249573
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: September 19, 1978
    Inventor: Charles Roy Harris, Jr.
  • Patent number: D252587
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: August 7, 1979
    Assignee: Plant Site, Inc.
    Inventor: William B. Darwin