With Programmed, Cyclic, Or Time Responsive Control Means Patents (Class 96/115)
Regulating or metering means (Class 96/116)
Indicating, signal, or alarm means (Class 96/117)
  • Gas separation device
    Patent number: 5344474
    Abstract: A desiccant tower receives air at its air inlet and concentrates the oxygen in this air in order to provide a gas at its gas outlet which has a concentration of oxygen exceeding the concentration of oxygen normally found in air. A bypass conduit is coupled to the desiccant tower so as to syphon off gas from the desiccant tower at a point where the gas within the desiccant tower has a concentration of oxygen which is less than the concentration of oxygen in the gas at the gas outlet of the desiccant tower. The gases at the gas outlet of the desiccant tank and in the conduit are mixed so as to produce an output gas mixture having a desired concentration of oxygen. The desired concentration of oxygen is less than a desiccant tower can ordinarily provide but greater than the concentration of oxygen normally found in air.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: September 6, 1994
    Assignee: Air Dry Corporation of America
    Inventor: Robert A. Null
  • Thermally coupled pressure swing adsorption
    Patent number: 5256172
    Abstract: Pressure swing adsorption separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds cooperating to exchange energy from an adsorbent bed undergoing a depressurization step to an adsorbent bed undergoing a pressurization step, and with provision for thermal coupling in order to improve process efficiency. Thermal coupling is provided as heating to augment expansion energy recovery, and as a temperature gradient imposed in adsorbent beds to provide the function of a thermal regenerator in a regenerative thermodynamic cycle. The invention provides improved techniques for recovery of expansion energy in pressure swing adsorption, and for direct application of thermal energy to power pressure swing adsorption processes.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: October 26, 1993
    Inventor: Bowie G. Keefer
  • Bisbenzoin ethers and method of producing benzoin ethers
    Patent number: 4101584
    Abstract: New bisbenzoin ethers are produced. The method of producing the bisbenzoin ethers comprises the reaction of an alkyl glycol with benzoin utilizing phosphorous oxychloride as the catalyst with hydrogen chloride as acid reacting agent. The use of phosphorous oxychloride as catalyst with hydrogen chloride improves the production of benzoin ethers in general by the reaction of benzoin with the selected alcohol.
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: July 18, 1978
    Assignee: Napp Chemicals Inc.
    Inventors: Walter J. Ranus, Jr., Lester Dennis McClure
  • Electron beam recording media and method of recording
    Patent number: 3940507
    Abstract: Recording media comprising films of a polydialdehyde are suitable for recording information with electron beams.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: February 24, 1976
    Assignee: RCA Corporation
    Inventors: John Fech, Jr., Eugene Samuel Poliniak