Patents Assigned to Pari-Symac
  • Devices which comprise a helical spring used as conveying, extracting, quantity-controlling or mixing means
    Patent number: 4496086
    Abstract: A rotating helical coiled spring for conveying, extracting, quantity-controlling or mixing particulate products. A supple material such as a brush is attached to the periphery of the spring and brushes against a rigid wall or tube as the spring is rotated thereby propelling the particulate product in a direction generally parallel to the axis of the spring.
    Type: Grant
    Filed: May 5, 1982
    Date of Patent: January 29, 1985
    Assignee: Pari-Symac
    Inventor: Pierre Duchadeau