Vacuumized Chamber With Open Vapor Or Gas Outlet Patents (Class 62/268)
  • Patent number: 4185466
    Abstract: A partial pressure condensation pump for increasing the partial pressure of a gas or gases in a gas-vapor mixture, without mechanical pumping, while removing a vapor or vapors from the mixture and while conserving the relative abundances of the gaseous species present. More particularly, the invention comprises a pump which includes a housing providing a flow passage having an inlet and an outlet at the downstream end thereof, a vapor condenser in the flow passage downstream from the inlet, means for suppressing back diffusion of gas toward the inlet, and outflow metering means controlling flow through the outlet for balancing the outgoing gas flow through the outlet and the incoming gas flow through the inlet.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: January 29, 1980
    Assignee: Grumman Aerospace Corporation
    Inventor: Eric P. Muntz
  • Patent number: 4150549
    Abstract: Cryopumping speed of nitrogen, helium, hydrogen and neon can be increased by omitting the chevron baffle in a conventional cryopump and preventing incident radiation of about 300.degree. K. from striking surfaces used to cryosorb helium, hydrogen and neon. An apparatus is disclosed utilizing three pumping surfaces created from open ended opposed nested cylinders. A radiation absorbent coating is placed on one of the surfaces to shield the helium, hydrogen and neon pumping surface. Refrigeration can be provided by a two-stage closed cycle cryogenic refrigerator.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: April 24, 1979
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Ralph C. Longsworth
  • Patent number: 4148196
    Abstract: A multiple stage cryogenic vacuum pump is disclosed for transferring matter or species between a gas and a vacuum chamber. The vacuum chamber has an orifice through which the matter or species moves and through which some of the gas leaks into the chamber. The chamber also has an interior surface which is spaced from the path of movement of the matter or species and encircles such path, and an internal divider extending to a position adjacent the interior surface and dividing the chamber into a first region adjacent the orifice and a second region downstream from the first region, with the interior surface extending in both regions. The surface is cooled by a single refrigerating device to below the condensation temperature of the gas, to produce a pressure below atmospheric in the first region and a lower pressure in the second region. The divider contains an aperture through which the matter or species travels and may itself be cooled to precool gas contacting it.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: April 10, 1979
    Assignee: Sciex Inc.
    Inventors: John B. French, Neil M. Reid, Janette A. Buckley
  • Patent number: 4141224
    Abstract: A closed loop apparatus for spraying coolant against the back of a radiation target. The coolant is circulated through a closed loop with a bubble of inert gas being maintained around the spray. Mesh material is disposed between the bubble and the surface of the liquid coolant which is below the bubble at a predetermined level. In a second embodiment no inert gas is used, the bubble consisting of vapor produced when the coolant is sprayed against the target.
    Type: Grant
    Filed: August 31, 1977
    Date of Patent: February 27, 1979
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Donald L. Alger, William B. Schwab, Edward R. Furman
  • Patent number: 4121430
    Abstract: A cryopump having a generally axially symmetrical housing provided at one end with an entrance opening defined by a plane for passage of molecules of the gas to be pumped and plates defining condensation surfaces arranged to be brought to low temperature for condensation of molecules of the gas to be pumped, and a thermal radiation shield disposed in the region of the entrance opening, with the condensation surfaces being oriented substantially at right angles to the plane of the entrance opening and the radiation shield being composed of a plurality of elongate metal strips so positioned that their longitudinal axes are parallel to the condensation surfaces.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: October 24, 1978
    Assignee: Leybold-Heraeus GmbH & Co. KG
    Inventors: Werner Bachler, Hans-Joachim Forth, Rudiger Frank
  • Patent number: 4110091
    Abstract: In the dispensing of gasoline into a tank used for the storage or transportation of gasoline wherein the gasoline displaces a gaseous mixture of air and gasoline, and said mixture is treated to a recovery step to separate said gasoline from said mixture, there is provided an improvement in the recovery step which comprises cooling said mixture to condense out the gasoline and water from the air thereby purifying the air, and then separating the water from the gasoline.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: August 29, 1978
    Assignee: Linde Aktiengesellschaft
    Inventors: Werner Daeschler, Hans Rainer
  • Patent number: 4102392
    Abstract: An air conditioning system for building utilizes a vertically aligned, generally straight conduit rain tower for scrubbing and pumping air between the exhaust air conduit system and the supply air conduit system in conjunction with an evaporative water chiller utilizing a venturi to create a vacuum in the water chiller for low temperature vaporization of return water. Gravity flow of water through the venturi is used to create the suction head.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: July 25, 1978
    Inventor: Theodore S. Schneider
  • Patent number: 4089185
    Abstract: The invention provides a high vacuum pump system of high pumping speed in which the surfaces that are to be cooled are coated with adsorbents in such a manner that it is possible to bale out and activate the coatings at temperatures between 250.degree. and 400.degree. C and then to use them for the maintenance or repeated generation of high vacua containing no hydrocarbons down to pressures as low as about 10.sup.-8 torrs.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: May 16, 1978
    Assignee: Eckhard Kellner
    Inventors: Josef Kemmer, Eckhard Kellner
  • Patent number: 4072025
    Abstract: The invention relates to a regeneration-type cryopump which has an annular reservoir for liquid nitrogen situated above an annular reservoir for liquid helium and incorporates, sliding in the central opening in the said reservoir, a valve member which is mounted on a rod. When the valve member is in one position, the cryopump is in normal operation, whereas when the valve member is in another position and rests against a seating, regeneration may take place.Such a pump may be used for generating very high vacua.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: February 7, 1978
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Jean-Jacques Thibault
  • Patent number: 4061483
    Abstract: The preservation of metabolically active matter such as fruit, vegetables, meat, fowl, shrimp, fish, other food, cut flowers, cuttings, foliage plants and the like is disclosed, characterized by storage at controlled and correlated conditions of hypobaric pressure, temperature, humidity, air circulation and air exchange. A non-deleterious gas such as air is humidified by contacting it with heated water from a supply, and then the humid air is passed through, and when advisable, recirculated and/or rehumidified within a storage chamber containing the metabolically active matter. The relative humidity is maintained within the range of about 80 to 100 percent and the pressure is maintained continuously or intermittently at a selected value at least slightly higher than the vapor pressure of the water in the stored commodity.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: December 6, 1977
    Assignee: Grumman Allied Industries Inc.
    Inventor: Stanley P. Burg
  • Patent number: 3965689
    Abstract: A method and apparatus for venting cryogenic storage tanks. In the method, a non-flammable, non-combustion supporting, relatively warm gas is mixed with cold vapors vented from a cryogenic storage tank to warm the vented vapors to a characteristic density less than that of the air adjacent the tank. The apparatus employed includes a vent pipe having a Venturi ejection throat therein, a pressure relief valve spaced from the ejection throat, and a gas ejector nozzle extending into the vent pipe between the safety relief valve and the ejection throat.
    Type: Grant
    Filed: July 18, 1974
    Date of Patent: June 29, 1976
    Assignee: University Engineers, Inc.
    Inventors: Lester E. Brown, Harry H. West
  • Patent number: 3958028
    Abstract: The preservation of metabolically active matter such as fruit, vegetables, meat, fowl, shrimp, fish, other food, cut flowers, cuttings, foliage plants and the like is disclosed, characterized by storage at controlled and correlated conditions of hypobaric pressure, temperature, humidity, air circulation and air exchange. A non-deleterious gas such as air is humidified by contacting it with heated water from a supply, and then the humid air is passed through, and when advisable, recirculated and/or rehumidified within a storage chamber containing the metabolically active matter. The relative humidity is maintained within the range of about 80 to 100% and the pressure is maintained continuously or intermittently at a selected value at least slightly higher than the vapor pressure of the water in the stored commodity.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: May 18, 1976
    Assignee: Grumman Allied Industries, Inc.
    Inventor: Stanley P. Burg
  • Patent number: 3950963
    Abstract: A portable refrigerating unit has a condenser coil which may be inserted directly into the drying chamber of a freeze drying apparatus. A flexible tube is utilized to convey refrigerant to and from the condenser coil. The flexible tube and the condenser coil are connected through a closure member, which provides a vacuum tight seal for the drying chamber of the freeze drying apparatus. The closure member may be removed from the condenser coil, so that various closure sizes may be utilized and so that the condenser coil may be utilized as an immersible refrigerating device.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: April 20, 1976
    Assignee: The Virtis Company
    Inventor: David Theodore Sutherland