Patents Assigned to Teisaku Co., Ltd.
  • Impact device
    Patent number: 4784228
    Abstract: An impact device that consists of a housing having a bore, a piston, and a change-over valve for control of the reciprocal movement of the piston is presented in the present invention. In the present invention, it is not necessary to employ a long-size piston and a high piston speed is obtained and, further, a compact device in which the fluctruation of the pressure in the low pressure path is small can be obtained.
    Type: Grant
    Filed: September 9, 1987
    Date of Patent: November 15, 1988
    Assignee: Teisaku Co., Ltd.
    Inventor: Ikuo Ito