Patents Assigned to Schreves, Inc.
  • Patent number: 4135588
    Abstract: The boring and compacting tool comprising an elongated shaft having a front conical section and a rear cylindrical portion. A front helical spring is wrapped about the conical section and attached thereto at the ends thereof. A cutting head is threaded onto a front end of the conical portion. A distinct annular cylindrical collar fits about the cylindrical section of the shaft and is removably secured thereto. A rear helical spring is fitted about the conical portion of the shaft behind the collar and is threaded about the shaft in the same direction as the front helical spring.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: January 23, 1979
    Assignee: Schreves, Inc.
    Inventor: Robert L. Wagner