Patents Assigned to Ibuki Kogyo Co., Ltd.
  • Pump apparatus
    Patent number: 7713037
    Abstract: In a pump apparatus of the present invention, a portion of fluid sent to a fluid-sending destination is circulated to a pumping driving chamber on one side of a cylinder through a circulation passage. The pump apparatus includes a switching valve which switches inflow and outflow of the circulated fluid with respect to the pumping driving chamber. The switching valve is connected to a piston rod through a link mechanism, and mechanically carries out the switching operation using a pumping driving force.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: May 11, 2010
    Assignees: Amtec Co., Ltd., Shimada & Co., Ltd., Ibuki Kogyo Co., Ltd.
    Inventors: Masayuki Hosokawa, Fumihiro Shintaku
  • Horn speaker having a cooling device
    Patent number: 5166982
    Abstract: A horn speaker in which a cooling device is attached near a moving coil which vibrates a diaphragm. The cooling device may be attached to the inner periphery of a bobbin which is connected to the diaphragm and around the outer periphery of which the moving coil is wound.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: November 24, 1992
    Assignee: Ibuki Kogyo Co. Ltd.
    Inventor: Yoshishige Shintaku
  • Horn speaker with reduced magnetic flux leakage
    Patent number: 4492827
    Abstract: By adding a secondary magnetic piece with a partially open magnetic circuit to the front surface of a yoke connected to a primary magnetic piece, the magnetic flux leakage from the main magnetic piece is reduced on one hand and the magnetic flux extending across a magnetic gap is intensified through formation of a favorable magnetic field. This horn speaker is particularly useful in a ship where a horn speaker as an alarm is often required to be placed near magnetically sensitive equipment such as a compass.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: January 8, 1985
    Assignee: Ibuki Kogyo Co., Ltd.
    Inventor: Yoshishige Shintaku
  • Horn speaker with linear grooves in a front surface of a pole piece of a yoke
    Patent number: 4378471
    Abstract: A horn speaker wherein a pole piece of a yoke is arranged inside an annular permanent magnet and a moving coil which vibrates a diaphragm, is arranged in an air gap between the pole piece and the annular permanent magnet. A plurality of linear grooves are formed in the front surface of the pole piece in order to suppress the generation of the heat of the pole piece and the moving coil.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: March 29, 1983
    Assignee: Ibuki Kogyo Co., Ltd.
    Inventor: Yoshishige Shintaku
  • Coldproof reflex horn speaker
    Patent number: 4317009
    Abstract: A coldproof reflex horn speaker comprising a frame, a magnet mounted thereto, a diaphragm having a voice coil in its periphery, and inner and outer horns, which is provided with an electric heater device disposed to the outer horn in order to prevent ice and snow from being frozen thereon in cold circumstances.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: February 23, 1982
    Assignee: Ibuki Kogyo Co., Ltd.
    Inventor: Yoshishige Shintaku
  • Electric horn with twin driving electromagnets
    Patent number: 4241334
    Abstract: An electric horn is disclosed which has two electromagnets which are alternately and repeatedly energized so as to move a diaphragm to and fro in opposite directions. As a particular feature, a controller is disclosed which energizes these electromagnets at a frequency which is dependent upon ambient air temperature, so as to keep the wavelength of the emitted sound constant to provide a better match for the horn trumpet of the electric horn and cause better resonance therewith.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: December 23, 1980
    Assignee: Ibuki Kogyo Co., Ltd.
    Inventor: Yoshishige Shintaku
  • Siren
    Patent number: D269417
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: June 21, 1983
    Assignee: Ibuki Kogyo Co., Ltd.
    Inventor: Yoshishige Shintaku