Patents by Inventor Jin S. Cho

Jin S. Cho 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: 4830042
    Abstract: A liquid level control float valve comprising a valve body having an inlet, a cap having an outlet, a drain pipe having a drain aperture, a piston member having a fluid aperture disposed in an upper plate and a disc valve disposed in the lower portion thereof, and a float ball connected to the outlet through an open/close valve, whereby upon the change in the level of the liquid, the float ball is raised and or lowered which in turn moves the piston member which further opens or closes in a corresponding manner the outlet and the drain aperture.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: May 16, 1989
    Inventor: Jin S. Cho
  • Patent number: 4741358
    Abstract: A liquid level control float valve which comprises a valve body, an open/close valve disposed in the valve body, the open/close valve being mounted on a gear shaft which extends from the inside of the valve body to the outside of the valve body and on opposite sides thereof, engaging members fixed to the gear shaft on opposite sides of the valve body, passive gears rotatably engaged with the gear shaft on opposite sides of the valve body and adapted to engage the engaging members after a selected portion of its rotation has taken place, driving gears mounted for rotational engagement with the passive gears, a float ball provide to determine the liquid level, and lever arms connected at one end to the float ball and at the other end to the driving gears whereby upon the change in the level of the liquid, the float ball is raised or lowered which in turn rotates the driving gears and the passive gears engaged therewith which further rotates the gear shaft and correspondingly the open/close valve.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: May 3, 1988
    Inventor: Jin S. Cho