Patents by Inventor Joon H. Han

Joon H. Han 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: 4825591
    Abstract: A watering device for plants includes a plant container which is balanced on a vertical moving rod by a spring and a water reservoir tank is operatively associated with the plant container so that as the plant container becomes lighter due to a loss of water, the spring member disposed at the opposite end of the vertical moving rod from the plant container actuates a valve in the water reservoir tank and transfers water from the water reservoir tank to the plant container until a balance is again achieved, and when the balance is reached, the valve in the water tank is again closed.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: May 2, 1989
    Inventor: Joon H. Han
  • Patent number: 4696222
    Abstract: A brake holding system for vehicles, comprising a vacuum and magnetic device including a brake holder, a moon gear having a plurality of teeth, a push rod connected to a master cylinder, a speed monitoring device having a needle being contacted to a switch member and a brake releasing switch operatively associated with the accelerator. The brake holding system can be placed into position when the speed of the vehicle is reduced to between 0 and 5 mph by application of the brake pedal. The brake is then automatically unlocked by depressing the accelerator pedal. Also, the driver can pull an emergency handle to mechanically release the brake.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: September 29, 1987
    Inventor: Joon H. Han
  • Patent number: 4254843
    Abstract: An electrically powered vehicle having a bank of batteries supplying electricity to an electric motor driving wheels of the vehicle includes a whirl ventilator system, a clutch system and an automatically operated, engine-generator unit for recharging the batteries. The whirl ventilator system includes housings to produce a whirling air flow rotating a fan to drive an alternator such that air flow from movement of the vehicle generates electricity to charge the batteries. The clutch system includes a clutch mechanism coupling a drive shaft and a driven shaft to impart a driving force to the wheels when the drive shaft is rotated faster than the driven shaft and to couple the driven shaft with a flywheel when the driven shaft is rotating faster than the drive shaft, the flywheel driving an alternator such that momentum of the vehicle causes the alternator to charge the batteries.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: March 10, 1981
    Inventors: Joon H. Han, Tae H. Cho