Nipro Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Takuya Masuda

Susumu Kobayashi

Masakazu Adachi

Akihiko Ishizaki

Keisuke Muto

Maiya Sanuki

Katsuhiro Hiejima

Ken Suzuki

Motoyoshi Iwata

Kazuyoshi Harada

Shinichiro Ishihara

A medical connector having a substantially cylindrical shape, a first upper end for receiving a male luer, and a second lower end, and including:

Medical connector

Electric power conversion device has first and second operation modes. First operation mode is of converting DC power from a first terminal into DC power having a desired voltage to be output to second terminal. Second operation mode is of converting DC power from the second terminal into DC power having a desired voltage to be output to first terminal. Switching section is configured to, in first operation mode, be turned on to cause short-circuiting between both ends of capacitor of rectifying circuit, and, in second operation mode, be turned off. First conversion part is configured to, in first operation mode, supply DC power-from first terminal, from first winding to second conversion part through a conversion circuit, and, in second operation mode, output to first terminal a voltage obtained by adding an output voltage of rectifying circuit to an output voltage of conversion circuit.

Electric power conversion device

A switching circuit is configured to switch on/off a current that flows through a resonance circuit constituted by a primary winding of a transformer, a capacitance element, and an inductor that are connected in series. Electric power that is induced in a secondary winding of the transformer is rectified by a rectifier circuit. A switch is connected in parallel with the capacitance element. A control unit is configured to control the switching circuit and the switch. The control unit is configured to select a first operation in which an operation frequency of the switching circuit is controlled by switching off the switch, and select a second operation in which a period during which a current flows from the switching circuit to the primary winding of the transformer is controlled by switching on the switch.

A medical connector capable of allowing, in which a stepped portion is not formed between upper surfaces of a valve and a housing, includes a disc shaped valve member which has a slit formed at a center portion thereof; a housing with a substantially cylindrical shape which sandwiches a circumferential edge portion of the valve member; and an annular ring member which is disposed on an upper circumferential edge of the valve member other than the center portion thereof, wherein the housing has a pedestal which is formed on an inner circumferential surface thereof so as to protrude inward, the valve member being placed on the pedestal, and wherein the valve member is fixed to the inside of the housing by allowing the ring member and the housing to be joined to each other by a swaging process after the valve member is placed on the pedestal in the housing.

To provide a high-frequency power amplifier capable of improving the linearity and efficiency of a high-frequency power amplifier by stabilizing, at high frequencies, the bias voltage of a bias circuit featuring the temperature compensating effect of a high-frequency amplifying transistor, a capacitoris connected between the base of a bias supply transistorand a reference potential. It is thus possible to possible to suppress variations in the base voltage of the bias supply transistorin particular when the high-frequency power amplifier is at high output and improve the linearity of the high-frequency power amplifier.

High-frequency power amplifier and communication device

A medical valve includes: (a) a housing having a hollow body opened at the top end, wherein the tip of a male luer is to be removably inserted in the housing; (b) a spike disposed to extend longitudinally in the housing, the spike except at least the top end portion being formed in an approximately tapered shape in which its outside diameter becomes progressively smaller toward the top end portion, wherein a fluid transferring passage, which is opened radially outwardly, is formed to extend longitudinally in the spike; and (c) an elastic seal having an elastically deformable tubular shape fitted on the spike to seal the spike, the elastic seal including a top end portion having an openable/closable portion to be openably closed over the spike, wherein the elastic seal is elastically deformed to be downwardly shrunk by downward pressure due to the tip of the male luer.

Growing community of inventors

Osaka, Japan

Takuya Masuda