Patents by Inventor Daniel Cotte

Daniel Cotte 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).

  • Hydraulic slide control safety valve for a mine support jack
    Patent number: 4557290
    Abstract: A safety valve designed for relieving pressure in a mine support jack. A washer and check valve are positioned in a counterbore located on the front surface of a resilient gasket member. A leg extends from the rear surface of the resilient gasket and extends through a rear chamber to support the check valve in a position sealing the outlet port. The rear chamber is filled with pressurized gas to form a gas cushion. The end of the leg is positioned to seal an inflation orifice.
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: December 10, 1985
    Assignee: Bennes Marrel
    Inventors: Roger Chanal, Daniel Cotte
  • Mining cylinder hydraulic slide valve
    Patent number: 4516601
    Abstract: A slide valve especially designed for mining prop cylinders. The slide valve is durable and can be easily checked and adjusted. An inlet pressure line is separated from an outlet line by a diaphragm pressed against its seat by a spring. A thrust washer allows the diaphragm to remain flat, even when it is subjected to the pressure of the spring.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: May 14, 1985
    Assignee: Bennes Marrel
    Inventors: Roger Chanal, Daniel Cotte