Patents Examined by Christopher Kilner
  • Patent number: 5787727
    Abstract: A high-temperature generator having a high durability and reliability is disclosed. The generator comprises a double shell type furnace body defining a combustion chamber and a liquid chamber surrounding the combustion chamber. A burner is arranged at a front end of the combustion chamber for generating high temperature gas within the combustion chamber. A smoke tube assembly including a plurality of smoke tubes is arranged in the liquid chamber aligned along a longitudinal direction of the furnace body. The rear end of the smoke tube opens to the combustion chamber. A rear wall having a double-wall configuration is provided with an aperture arranged to face the rear end of the smoke tube assembly, and the aperture is covered with a cover plate detachably mounted to the rear wall.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: August 4, 1998
    Assignee: Ebara Corporation
    Inventors: Naoyuki Inoue, Teiichi Mochizuki, Motonao Kera
  • Patent number: 5784894
    Abstract: A bypass valve for use with a component of an air cycle machine is disclosed, wherein the component includes a conditioning member, an inlet and an outlet. The air cycle machine includes a component housing portion. The component housing portion defines a first volume and includes a port for receiving the valve. The valve comprises a housing for mating with the port, an air entrance opening adapted to be positioned adjacent the inlet, an air exit opening adapted to be positioned adjacent the outlet, and a valve portion for controlling at least one of temperature and pressure of the air at the outlet. Control is accomplished by permitting air flow from the entrance opening to the exit opening and bypassing the conditioning member and by prohibiting air flow from the entrance opening to the exit opening for directing substantially all of the air into the conditioning member. The valve portion is substantially entirely positioned inside of the first volume in the port.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: July 28, 1998
    Assignee: United Technologies Corporation
    Inventors: Donald E. Army, Jr., Christopher McAuliffe, Michael D. Greenberg
  • Patent number: 5784899
    Abstract: The present invention employs a dry-type condenser capable of heat exchange even at small temperature difference for the condensers for the crude argon column, deoxidation column, and pure argon column in an argon separation apparatus using air liquefication and distillation. Additionally, oxygen-enriched liquefied air withdrawn from a plate which is higher than the bottom of the higher pressure column of a double distillation column is employed as the cold source for the condensers. As a result, a large temperature difference between the condensive and vaporative sides of each column's condensers can be obtained. Moreover, even when the total number of theoretical steps of the crude argon column and the deoxidation column exceeds 100, it is not necessary to provide a blower to increase pressure of the crude argon. Thus, the cost of the apparatus and its operation can be reduced.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: July 28, 1998
    Assignee: Nippon Sanso Corporation
    Inventors: Toshiyuki Nojima, Tomio Kura, Hideyuki Honda
  • Patent number: 5782096
    Abstract: A cryopump includes a two-stage refrigerator, a primary pumping surface, and a radiation shield. The radiation shield is in thermal contact with the first stage of the refrigerator. The primary pumping surface is surrounded by the radiation shield and is in thermal contact, through a direct conductive link, with the second stage of the refrigerator. The refrigerator, however, is external to the radiation shield.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: July 21, 1998
    Assignee: Helix Technology Corporation
    Inventors: Allen J. Bartlett, John J. Casello
  • Patent number: 5783001
    Abstract: A method of heat treating and cleaning maraging or precipitation hardening stainless steel surgical needles is disclosed. The method comprises exposing the surgical needles to a partial vacuum at a temperature less than the aging temperature to remove volatile surface contaminants. Then the needles are heat treated in an argon gas environment at a pressure equal to or greater than 1.0 atmosphere.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: July 21, 1998
    Assignee: Ethicon, Inc.
    Inventors: Timothy Sardelis, Douglas Warren Ackerman, William McJames
  • Patent number: 5778830
    Abstract: A frame for housing a retractable sootblower, having a movable carriage and lance tube for cleaning inside surfaces of a boiler, includes a front end wall disposed proximate and a rear end wall disposed distal to the boiler. A pair of opposed side walls, each having one end connected to the front end wall and the other end connected to the rear end wall, are also provided so as to generally define a rectangular box. Also included are one or more top panels, each configured to extend between the opposed side walls with the panels in a closed position to thereby provide protection to the sootblower from above and to be moveable to an open position to provide substantially unobstructed access to the carriage from above the frame.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: July 14, 1998
    Assignee: Combustion Engineering, Inc.
    Inventor: H. Davis Wall
  • Patent number: 5779467
    Abstract: A preheating apparatus for particulate material includes a plurality of vertical chambers, a temperature sensor within each chamber and a particulate discharge mechanism. Each chamber is segregated from an adjacent chamber by a vertical wall and includes a material inlet for receiving particulate material, a material outlet for discharging particulate material, a gas inlet for receiving a gas, and a gas outlet for exhausting gas. The temperature sensor is located within a chamber so as to sense temperature of the gas being exhausted from each chamber. A particulate discharge mechanism discharges particulate material within each chamber through the material outlet, with a flow rate adjusted as a function of temperatures sensed by the temperature sensor. A method for preheating particulate material includes sensing temperature of the gas existing each chamber and adjusting a flow rate of the particulate material through each chamber as a function of sensed temperature of each chamber.
    Type: Grant
    Filed: February 4, 1997
    Date of Patent: July 14, 1998
    Assignee: Svedala Industries, Inc.
    Inventor: Kenneth LeRoy Gardner
  • Patent number: 5775129
    Abstract: A heat exchanger for use within a sump to condense an vapor and to vaporize the liquid. The heat exchanger includes a core having alternating passages to vaporize the liquid and to condense the vapor. Liquid is distributed into passages through a liquid distributor and the passages involved in vaporizing the liquid are provided with a down flow, stage and one or more thermosiphon stages situated below the down flow stage. In such manner, part of the liquid is vaporized within the down flow stage and the remainder is vaporized within the thermosiphon stage or stages.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: July 7, 1998
    Assignee: The BOC Group, Inc.
    Inventors: Donald Prentice Satchell, Jr., Venkat Natarajan, Richard Henry Clarke
  • Patent number: 5775582
    Abstract: A method and apparatus for improving heating system efficiency. An electronic circuit senses a firing signal from a boiler energy value sensor such as a thermostat or pressuretrol. The circuit prevents the boiler energy value sensor from firing the burner, while the circuit senses an energy value of the outflow line at the boiler. The circuit monitors the outflow energy value and records the outflow energy value at a first time of the firing signal. The circuit then continually monitors the outflow energy until it detects an energy drop from the initial outflow energy value. The circuit responds to the energy drop by firing the burner. The invention self adaptively responds to present thermal load, reduces the number of on-off cycles, increases each burner run time while reducing total run time, improves fuel consumption, and reduces air pollution.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: July 7, 1998
    Inventor: Jack Hammer
  • Patent number: 5772430
    Abstract: Cooling device with panels for arc electric furnaces, which is used in an electric melting furnace in cooperation with the vertical sidewall placed above the lower shell (11) of the furnace, the furnace comprising in its lower part one lower shell (11) to contain a bath (12) of melting metal and an upper shell defined by a plurality of panels (16) comprising a plurality of cooling tubes (17), the lower shell (11) including at its outer part a metallic containing element (15), the inner refractory having an upper edge (19) located substantially at the level of the upper edge of the layer of slag (14) contained above the bath (12) of melting metal, each panel (16) including an outer layer (116) and at least an inner layer (22) of cooling tubes (17), the layers (116, 22) developing vertically along the vertical side wall of the furnace above the refractory edge of the lower shell (11) and being separated by an interspace (23).
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: June 30, 1998
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventors: Milorad Pavlicevic, Gianni Gensini, Alfredo Poloni, Romano Sellan
  • Patent number: 5768912
    Abstract: A process for producing a liquefied natural product such as LNG is described where a single phase nitrogen refrigerant is used in such a way that the refrigerant stream (10) is divided into at least two separate portions (12, 14) which are passed through separate turbo-expanders (106, 108) before being admitted to separate heat exchangers (103, 104) so that the warming curve of the refrigerant more closely matches the cooling curve of the product being liquefied so as to minimize thermodynamic inefficiencies and hence power requirements involved in operation of the method.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: June 23, 1998
    Inventor: Christopher Alfred Dubar
  • Patent number: 5765395
    Abstract: A process and apparatus are provided for recovering volatile liquid vapors from an air-volatile liquid vapor mixture. The process includes: (1) cooling the mixture to condense volatile liquid vapors and moisture; (2) collecting the condensed volatile liquid vapors and moisture; (3) circulating the cooled and dehumidified mixture through a bed of adsorbent; and (4) desorbing and recovering the volatile liquids from the bed. The apparatus includes a refrigeration unit, a cooler for cooling the mixture, two reaction vessels each including a bed of adsorbent, a pump, an absorber tower and a valve and conduit system for circulating the mixture through the various components of the apparatus. Heat may be recovered from the refrigerant and used to heat the bed during desorption.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: June 16, 1998
    Assignee: Jordan Holding Company
    Inventor: Edward Menzenski
  • Patent number: 5761927
    Abstract: A process is set forth for the cryogenic distillation of an air feed to produce nitrogen, particularly high pressure nitrogen of ultra high purity (less than 100 parts per billion of oxygen). A key to the present invention is that, in addition to the conventional reboiler/condenser which links the high and low pressure column, the present invention utilizes two additional reboiler/condensers such that the oxygen rich liquid which collects at the bottom of the low pressure column is reboiled at three different pressure levels.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: June 9, 1998
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Rakesh Agrawal, Catherine Catino Latshaw
  • Patent number: 5761911
    Abstract: Provided is a novel system and method for delivery of a gas from a liquified state. The system includes: (a) a compressed liquified gas cylinder having a gas line connected thereto through which the gas is withdrawn; (b) a gas cylinder cabinet in which the gas cylinder is housed; and (c) means for increasing the heat transfer rate between ambient and the gas cylinder without increasing the gas cylinder temperature above ambient temperature. The apparatus and method allow for the controlled delivery of liquified gases from gas cabinets at high flowrates. Particular applicability is found in the delivery of gases to semiconductor process tools.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: June 9, 1998
    Assignee: American Air Liquide Inc.
    Inventors: Benjamin Jurcik, Richard Udischas, Hwa-Chi Wang
  • Patent number: 5755114
    Abstract: A process is shown for producing liquefied natural gas from a pressurized natural feed stream. The feed stream is introduced into heat exchange contact with a mechanical refrigeration cycle to cool the feed stream to a first cooling temperature. At least a portion of the feed stream is passed through a turboexpander cycle to provide auxiliary refrigeration for the mechanical refrigeration cycle to thereby cool the feed stream to a second, relatively lower cooling temperature.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: May 26, 1998
    Assignee: ABB Randall Corporation
    Inventor: Jorge Hugo Foglietta
  • Patent number: 5749243
    Abstract: A low-temperature refrigeration system (10) is disclosed for accurately maintaining an instrument (11) with a time varying heat output at a substantially constant predetermined cryogenic temperature. The refrigeration system (10) controls the temperature of the instrument (11) by accurately adjusting the pressure of coolant at a heat exchanger interface (12) associated with the instrument (11). The pressure and flow of coolant is adjusted through the use of one or two circulation loops and/or a non-mechanical flow regulator (24) including a heater (32). The refrigeration system further provides a thermal capacitor (16) which allows for variation of the cooling output of the system (10) relative to a cooling output provided by a cooling source (14).
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: May 12, 1998
    Assignee: Redstone Engineering
    Inventor: James Marsh Lester
  • Patent number: 5749246
    Abstract: The method and the apparatus are used to obtain oxygen and nitrogen at superatmospheric pressure by low-temperature separation of air in a rectification column system. Compressed and purified feed air (1, 3) is introduced into a pressure column (4). Liquids (5, 8) from the lower region and, respectively, from the upper or middle region of the pressure column (4) are fed into the low-pressure column (7). A third liquid fraction (17) from the lower region of the low-pressure column (7) is evaporated in indirect heat exchange (12) with condensing vapour (11) from the upper region of the pressure column (4), at least a portion of the vapour (22, 24, 26, 27) obtained in the process being introduced into the low-pressure column (7). Condensate (13) is fed into the pressure column (4); A pressurized nitrogen fraction (10, 14, 15) is extracted as product from the upper region of the pressure column (4).
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: May 12, 1998
    Assignee: Linde Aktiengesellschaft
    Inventor: Dietrich Rottmann
  • Patent number: 5743095
    Abstract: Active magnetic regenerator and method using Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.4, where x is equal to or less than 0.5, as a magnetic refrigerant that exhibits a reversible ferromagnetic/antiferromagnetic or ferromagnetic-II/ferromagnetic-I first order phase transition and extraordinary magneto-thermal properties, such as a giant magnetocaloric effect, that renders the refrigerant more efficient and useful than existing magnetic refrigerants for commercialization of magnetic regenerators. The reversible first order phase transition is tunable from approximately 30 K to approximately 290 K (near room temperature) and above by compositional adjustments. The active magnetic regenerator and method can function for refrigerating, air conditioning, and liquefying low temperature cryogens with significantly improved efficiency and operating temperature range from approximately 10 K to 300 K and above. Also an active magnetic regenerator and method using Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: April 28, 1998
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Karl A. Gschneidner, Jr., Vitalij K. Pecharsky
  • Patent number: 5740617
    Abstract: A rotary drum dryer dries a slurry into discrete solid particles. The dryer contains three long horizontal cylinders: an outer cylinder, a perforated cylinder inside the outer cylinder, and an inner cylinder inside the perforated cylinder. As the cylinders rotate, slurry in the outer cylinder is compressed through the perforated cylinder by the inner cylinder and deposited onto the inner wall surface of the outer cylinder in discrete masses. The masses are dried as the cylinder rotates and then are removed by a scraper and conveyed outside the dryer for further treatment and/or packaging.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: April 21, 1998
    Inventor: Norman P. Rittenhouse
  • Patent number: 5740682
    Abstract: A method for the recovery of fugitive volatile organic vapors which comprises the steps of: (a) compressing said vapors to a pressure of at least 200 kpa; (b) feeding the hot compressed vapors to the desorption step of a Heat-Mass-Exchange (HME) system; (c) cooling the effluent resulted from the desorption step to the ambient temperature and separating out the condensed liquid obtained and (d) feeding the residual cold vapor phase, after the separation of the condensed liquid, to the adsorption step of said HME system, thus recovering the fugitive organic vapors. According to a preferred embodiment, the compressed vapors resulted from step (b) are at a temperature in the range of between 80.degree. to 150.degree. C., which may be reached by an external heating and the effluent resulted from the desorption step (c) is cooled at a temperature of about 5.degree. C.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: April 21, 1998
    Assignees: Ram Lavie, Technion Research and Development Foundation Ltd.
    Inventor: Ram Lavie