Patents by Inventor Hjalmar Schibbye

Hjalmar Schibbye has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and means for cooling the oil in a system including a compressor with oil supply, as well as such systems
    Patent number: 4112701
    Abstract: A gas compression system and method utilizing an oil-injected rotary compressor, an oil separator in the discharge line thereof, and an oil supply line between the oil separator and the working space of the compressor. Said oil line conducts oil and gas dissolved in the oil to a throttling device incorporated in the line which causes a decrease in the temperature of the oil due to boiling off of the gas dissolved in the oil, which cooled oil is then conducted into the working space of the compressor. The invention applies to refrigeration systems.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: September 12, 1978
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventors: Hjalmar Schibbye, Lennart Eriksson
  • Refrigerating system
    Patent number: 4084405
    Abstract: A refrigerating system comprises a liquid refrigerant supply line connecting the outlet of a condensor with a throttle valve connected to the inlet of an evaporator, a first liquid refrigerant receiver tank intermittently disconnected from the supply line and connected to a special suction line for performing a liquid refrigerant precooling sequence by drawing vapor from the receiver tank during time periods when the refrigerating cycle is continuously maintained via an additional receiver tank connected between the condensor and the throttle valve.
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: April 18, 1978
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventors: Hjalmar Schibbye, Tord Holmstrom
  • Screw compressor control means
    Patent number: 4042310
    Abstract: Volume control valve for a screw compressor located in a cylindrical bore parallel to and spaced from the working space. The bore and the working space communicate through a number of axially distributed channels which are selectively closed by an adjustable valve member disposed in the bore.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: August 16, 1977
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventors: Hjalmar Schibbye, Arnold Englund
  • Refrigeration systems
    Patent number: 3945216
    Abstract: Vehicle air-conditioning and other refrigerator systems utilizing specified helical screw compressors and operated under specified conditions and using specified refrigerants and oils. Also disclosed are improved hydrocarbon compressor systems which also utilize specified helical screw compressors and are operated under specified conditions using specified oils selected in relation to the hydrocarbon being compressed.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: March 23, 1976
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventor: Hjalmar Schibbye
  • Screw rotor machine with spring and fluid biased balancing pistons
    Patent number: 3932073
    Abstract: A screw rotor machine for an elastic working fluid in which the rotors are biassed towards the high pressure end wall by means of balancing pistons and interposed bearings.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: January 13, 1976
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventors: Hjalmar Schibbye, Arnold Englund