Patents by Inventor John M. Halmose

John M. Halmose 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).

  • Expansion device for a refrigeration system, piston therefor and methods of making the same
    Patent number: 5041257
    Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: August 20, 1991
    Assignee: Robertshaw Controls Company
    Inventors: Roger P. Sepso, John M. Halmose
  • Expansion device for a refrigeration system, piston therefor and methods of making the same
    Patent number: 5014729
    Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr
    Type: Grant
    Filed: August 2, 1989
    Date of Patent: May 14, 1991
    Assignee: Robertshaw Controls Company
    Inventors: Roger P. Sepso, John M. Halmose
  • Expansion device for a refrigeration system, piston therefor and methods of making the same
    Patent number: 4869290
    Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr
    Type: Grant
    Filed: August 17, 1988
    Date of Patent: September 26, 1989
    Assignee: Robertshaw Controls Company
    Inventors: Roger P. Sepso, John M. Halmose
  • Expansion device for a refrigeration system, piston therefor and methods of making the same
    Patent number: 4784177
    Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: November 15, 1988
    Assignee: Robertshaw Controls Company
    Inventors: Roger P. Sepso, John M. Halmose