Patents Assigned to Thomsen Equipment Company
  • Concrete pump
    Patent number: 4303378
    Abstract: A fluid operated pump for concrete and similar materials comprising a pair of piston-cylinder units connected to a concrete housing having a single valve for controlling the charging and discharging of the material. The valve control element and the concrete housing are defined in a mating relationship for minimizing flow restrictions of the material moved through the housing. Other efficiencies in the fluid circuit structures and arrangements are provided.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: December 1, 1981
    Assignee: Thomsen Equipment Company
    Inventor: John Hunter
  • Flapper valve blade for a concrete pump or the like
    Patent number: D252515
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: July 31, 1979
    Assignee: Thomsen Equipment Company
    Inventor: John T. McGraw
  • Flow control valve chamber for a concrete pump or the like
    Patent number: D252516
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: July 31, 1979
    Assignee: Thomsen Equipment Company
    Inventor: John T. McGraw
  • Flapper valve housing for a concrete pump or the like
    Patent number: D253704
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: December 18, 1979
    Assignee: Thomsen Equipment Company
    Inventor: John T. McGraw