Patents Assigned to Minoru Yamada
  • Patent number: 4534914
    Abstract: A method and apparatus for producing vortex rings of a gas in a liquid. The apparatus includes: an accumulator including a gas outlet for discharging the gas and a gas inlet for introducing a gas from a gas supply source thereinto; a nozzle attached to the outlet of the accumulator in a communicating relation to the accumulator, the nozzle being of elasticity such that the nozzle is sealingly closed under liquid pressure when used; valve, connected to the accumulator, for permitting a gas supply from the gas supply source to the nozzle; and a mechanism for actuating the valve when gas pressure within the accumulator reaches predetermined pressure levels. In the method an accumulator is positioned in the liquid, and then the gas under pressure higher than that in the liquid surrounding the accumulator is supplied to the accumulator, from which the supplied gas is introduced into a nozzle communicated to the accumulator to open the nozzle against the pressure in the surrounding liquid.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: August 13, 1985
    Assignees: Nihon Sanso Kabushiki Kaisha, Minoru Yamada
    Inventors: Masashi Takahashi, Minoru Yamada