Patents by Inventor Charles Pierre Hallez

Charles Pierre Hallez 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).

  • Device to control the locking of a boring corer
    Patent number: 4832138
    Abstract: To control the locking of a cable boring corer (1), a control device (30) is used, comprising a deflecting casing (33), a sleeve (31) and a piston (32), which are movable in relation to the deflecting casing (33). The piston (32) is able to be rendered integral in a lower position, under hydraulic pressure, with the sleeve (31) by a finger (43). When the hydraulic pressure is released, the sleeve (31), which is integral with the piston (32), is brought into an upper position which allows the circulation of a boring liquid through the deflecting casing (33) towards a boring crown (4).
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: May 23, 1989
    Assignee: Diamant Boart S.A.
    Inventor: Charles Pierre Hallez