Patents by Inventor Michel A. J. Legrain

Michel A. J. Legrain 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).

  • Patent number: 4291647
    Abstract: The device comprises a syphon which connects a reservoir to a collecting recipient. The reservoir is supplied with liquid through a valve. A tube extends the reservoir upwardly and carries a detector which checks the level situated just above the syphon. A second detector is placed at the outlet of the syphon. The two detectors are electrically connected to the control of the valve so as to close the valve when the liquid reaches the detector checking the level and to preclude the opening of the valve so long as the detector receives liquid issuing from the syphon. The amount of liquid poured upon each opening of the valve is thus always strictly the same.Application to the preparation of mixtures having a precise and adjustable concentration, such as a mixture of powdered milk and water.
    Type: Grant
    Filed: March 12, 1980
    Date of Patent: September 29, 1981
    Inventor: Michel A. J. Legrain