Patents by Inventor Michael H. Hurst

Michael H. Hurst 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).

  • Liquid dosing device with digital display
    Patent number: 4815632
    Abstract: A liquid dispenser has a cylinder in which a piston may move in an intake stroke and a discharge stroke. A pulse generator responds to any movement of the piston in the discharge direction, whereby a counting and readout device provides a dispensing measurement readout even for inadvertent discharge movements of the piston. Movement of the piston in the discharge direction rotates a wheel in the pulse generator. A ratchet system may be provided to prevent rotation of the wheel in reverse during intake movements of the piston. Alternatively the wheel rotates in both directions, and a discriminator is provided to discriminate between the two directions of movement.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: March 28, 1989
    Assignee: Jencons (Scientific) Limited
    Inventors: Graham J. Ball, William B. Hart, Michael H. Hurst
  • Liquid dosing device with digital display
    Patent number: 4760939
    Abstract: A liquid dispenser has a cylinder in which a piston may move in an intake stroke and a discharge stroke. A pulse generator responds to any movement of the piston in the discharge direction, whereby a counting and readout device provides a dispensing measurement readout even for inadvertent discharge movements of the piston. Movement of the piston in the discharge direction rotates a wheel in the pulse generator. A ratchet system may be provided to prevent rotation of the wheel in reverse during intake movements of the piston. Alternatively the wheel rotates in both directions, and a discriminator is provided to discriminate between the two directions of movement.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: August 2, 1988
    Assignee: Jencons (Scientific) Limited
    Inventors: Graham J. Ball, William B. Hart, Michael H. Hurst