Patents Examined by Martin F. Schwadron
  • Regulating valve with hydraulic detent
    Patent number: 4083382
    Abstract: A regulating valve for controlling the flow of fluid from a source to a fluid operated clutch and brake as well as auxiliary devices is disclosed herein. The regulating valve incorporates a hydraulic detent which locks the valve spool in a clutch engaged position in response to the pressurized fluid delivered to the clutch so that the clutch is automatically released when a loss of hydraulic pressure occurs.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: April 11, 1978
    Assignee: J. I. Case Company
    Inventors: Ramkishan Khatti, Donald K. Johnson
  • Hot gas engine
    Patent number: 3942324
    Abstract: A hot gas engine including an injector for introducing a mixture of air and fuel into the combustion chamber to heat the working medium which is circulated in a system of ducts. Fresh air for the combustion of the fuel is preheated in a heat exchanger by exhaust gases from the combustion chamber and conducted to the fuel injector. A heating system for passing a heat exchange fluid to a space to be heated surrounds the combustion chamber, and the heat exchange fluid is thus heated by heat exchange with the exhaust gases.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: March 9, 1976
    Assignee: Forenade Fabriksverken
    Inventors: Lennart Nils Johansson, Ragnar Karl Olof Gronvall