Korea Advanced Institute of Science and Technology

Korea Electric Power Corporation

Meinntech Co., Ltd.

Hyung Jin Sung

Sang Bin Lee

Soo Jai Shin

Sang Youl Yoon

Woo Tae Jeong

Seibum Choi

Ho Gil Chu

Jinsung Kim

Hong Beom Park

Kwon Sang Hwang

Dewan Hasan Ahmed

Sung Yull Hong

A micropump includes: a fluid suction tube for suctioning fluid; a pumping tube connected to the fluid suction tube and providing a suction force and a discharge force to surroundings while repeatedly being expanded and contracted by an external signal; a deform tube connected to the pumping tube and having an aperture that is deformed by the suction force and the discharge force of the pumping tube; and a fluid discharge tube connected to the deform tube and discharging fluid.

Micropump and driving method thereof

Disclosed herein is a membraneless micro fuel cell. A cathode fluid and an anode fluid with a low Reynolds number flowing along a cathode channel and an anode channel are formed to have an interface with each other through a micro passageway and to be mixed by only diffusion so that the direct mixing of the cathode fluid and the anode fluid is prevented, making it possible to prevent reactants from being depleted at an electrode surface as well as to increase the efficiency of the fuel cell.

Membraneless micro fuel cell

A disk friction clutch apparatus using a self-energizing effect is disclosed. The clutch apparatus includes a drive friction disk connected to a drive shaft, a driven friction disk connected to a driven shaft, a push member configured to press the driven friction disk against the drive friction disk at an engagement position of a clutch, and an operation unit configured to shift the push member from the release position of the clutch to the engagement position. The operation unit is operated to increase a force of the push member to press the driven friction disk when the push member located at the engagement position of the clutch receives a force of rotating the drive shaft. Since the clutch apparatus employs a self-energizing effect, it is possible to fasten the clutch with a small force.

Disk friction clutch apparatus using self-energizing effect

Disclosed is a lance system for inter-tube inspecting and lancing as well as barrel spraying of heat transfer tubes of a steam generator in a nuclear power plant, so that foreign substances piled up around heat transfer tubes in the steam generator are removed using high-pressure water. The lance system includes a rigid guide support rail positioned above a Blow Down Lane (BDL) at the center of the steam generator, a locomotion box including a motor drive unit for inducing a rectilinear motion of a lance body and a motor drive unit for inducing a rotational motion of the lance body centering on a horizontal axis, the lance body including a circular barrel including a motor drive unit for vertically erecting or horizontally laying down a multistage circular pole assembly, and a flat plate provided with linear passages for passing high-pressure water hoses, an optical cable and control rods therethrough, a circular drum assembly for stably connecting the high-pressure water hoses, the optical cable and the control rods, and the multistage circular pole assembly being extensible and contractible by the movement of the control rods obtained by engaging teeth of a toothed belt unit, driven by a motor and positioned in the circular barrel, with gear teeth of the control rods, and two nozzle blocks, for barrel spraying, provided with barrel spray nozzles fixedly assembled therewith, symmetrically fixed to the inner surface of the circular barrel, wherein the multistage circular pole assembly is vertically erected in the operation of inter-tube lancing and inspecting, in which the lance system approaches inner parts of the heat transfer tubes and sprays the high-pressure water thereto, and is maintained in a horizontally laid-down position in the operation of barrel spraying.

Lance system for inter-tube inspecting and lancing as well as barrel spraying of heat transfer tubes of steam generator in nuclear power plant

The object of this invention is to provide a device for regulating the flow rate of an intravenous medical solution during an injection using an intravenous drip unit. The device has a housing () mounted to a hose () to allow the flow of the solution from a solution container () into the vein, and a control member () rotatably assembled with the housing to regulate the flow rate of the solution. The housing has first and second seats () communicating with inlet and outlet ports, and the control member has first and second bosses () seated in the first and second seats. An arc-shaped solution path (), a radial channel () and an annular groove () are formed on the control member to regulate the flow rate of the solution in accordance with an adjusted angle of the control member relative to the fixed housing.

Device for regulating flow rate of intravenous medical solution during injection

Growing community of inventors

Daejeon, South Korea

Hyung Jin Sung