Abstract: An anti-leak valve unit is removably attached to a base end portion of an overtube through which an endoscope is removably insertable. The anti-leak valve unit includes a frame portion attachable to the overtube, a fitting device on the frame portion that is removably engageable with the base end portion, and a valve element provided inside the frame portion. The frame portion and the fitting device can be embodied as first through third interconnected covers and first and second members attached to the first cover at edges thereof. The valve element can be embodied as a flexible member with an annular endoscope insertion port in a flexible elastic portion thereof.

Abstract: An anti-leak valve unit (1) is removably attached to a base end portion (43) of an overtube (4) that includes an inner cavity (42) through which an endoscope is to be removably inserted, and that is to be inserted into a body cavity. The anti-leak valve unit (1) includes a frame portion (3) attached to an outer circumferential surface (44) of the base end portion (43) of the overtube (4), a fitting device (2) provided on the frame portion (3) so as to be removably engaged with the outer circumferential surface (44) of the base end portion (43), and a valve element (5) provided inside the frame portion (3). The valve element (5) includes an annular endoscope insertion port located at a generally central portion of the valve element (5) so as to be circumferentially fitted to the endoscope, and a flexible elastic portion provided around the endoscope insertion port.

Abstract: A heat-transfer pipe (12) is formed so as to extend from a top portion of an outer pipe (11) and to be bent at a bottom portion of the outer pipe (11) to return to the top portion, and is arranged such that at least a portion thereof contacts an inner circumferential surface of the outer pipe (11). The heat-transfer pipe (12) is configured to allow fluid to be heat-exchanged to flow thereinside in opposite directions in heating operation and cooling operation.

Abstract: A coronary artery bypass grafting device includes a plurality of attachment members each having: a flexible tube (102); a suction cup portion (101) provided in a tip end side of the flexible tube (102); a three-way cock (103) provided in the flexible tube (102); and a holding member (104) that holds the flexible tube (102). At least one of the attachment members further includes a duckbill valve (111) provided in the flexible tube (102).

Abstract: An outer pipe (11), which is buried under the ground, is provided, and a heat transfer pipe (12), in which heat exchange fluid flows, is inserted into the outer pipe (11). A heat medium (13) is sealed in the outer pipe (11). At least a part of the heat transfer pipe (12) is formed by a flat body (12e, . . . ) that is formed by a flat pipe (12e, 14) or a composite pipe (15) in which a plurality of pipes (15a) are arranged in a flat shape. A flat side of the flat body (12e, . . . ) contacts an inner peripheral surface of the outer pipe (11).

Abstract: A heat exchanger installed under the ground or water includes an outer pipe installed vertically or installed inclinedly under the ground or water; and a heating heat-transfer pipe inserted into the outer pipe, and evaporating refrigerant injected thereto. A heat medium is sealed in the outer pipe. A heat exchange is performed by using a change in phase of the heat medium and a heat medium guiding section for guiding the heat medium condensed on an outer surface of the heating heat-transfer pipe to an inner wall surface of the outer pipe by using surface tension of the heat medium or by reducing an angle of contact on the inner surface is formed in an upper section of the outer pipe.

Abstract: A heat exchanger for exchanging heat under the ground or water includes an outer pipe (51) to be installed under the ground or water; and a cooling heat-transfer pipe (52) which is inserted into the outer pipe (51), and which dissipates heat from refrigerant injected thereto. A heat medium is sealed in the outer pipe (51). The outer pipe (51) and the cooling heat-transfer pipe (52) are arranged so that the liquid heat medium is held between an inner wall surface of the outer pipe (51) and an outer wall surface of the cooling heat-transfer pipe (52).

Abstract: An anti-leak valve unit (1) is removably attached to a base end portion (43) of an overtube (4) that includes an inner cavity (42) through which an endoscope is to be removably inserted, and that is to be inserted into a body cavity. The anti-leak valve unit (1) includes a frame portion (3) attached to an outer circumferential surface (44) of the base end portion (43) of the overtube (4), a fitting device (2) provided on the frame portion (3) so as to be removably engaged with the outer circumferential surface (44) of the base end portion (43), and a valve element (5) provided inside the frame portion (3). The valve element (5) includes an annular endoscope insertion port located at a generally central portion of the valve element (5) so as to be circumferentially fitted to the endoscope, and a flexible elastic portion provided around the endoscope insertion port.

Abstract: A coronary artery bypass grafting device includes a plurality of attachment members each having: a flexible tube (102); a suction cup portion (101) provided in a tip end side of the flexible tube (102); a three-way cock (103) provided in the flexible tube (102); and a holding member (104) that holds the flexible tube (102). At least one of the attachment members further includes a duckbill valve (111) provided in the flexible tube (102).

Abstract: An instrument for coronary artery bypass graft surgery has at least three sets of suction units, respectively provided with a flexible tube; a suction head disposed at an end portion of the flexible tube; a three-way cock mounted on the flexible tube; and a retainer which retains the flexible tube.

Abstract: The present invention provides a method for conducting electroplating in the presence of CO2 and a metal salt-containing aqueous solution, wherein the CO2 is in the form of liquid, subcritical or supercritical, the method being characterized in that a nonionic compound having a CO2-affinitive moiety is further added to the system where the aqueous solution and CO2 coexist. The method of the present invention improves the efficiency of the electrochemical reaction process and enables formation of an excellent metal film.

Abstract: The present invention relates to a method for recovering a surfactant from a water-carbon dioxide system comprising at least one type of surfactant, water and carbon dioxide, the method comprising the step of bringing the water-carbon dioxide system into contact with a dehydrating agent to remove water. Furthermore, the present invention relates to a method comprising the steps of installing a device for selectively removing a removal target in a circulation line in which circulated is a mixed system comprising carbon dioxide, a carbon dioxide-compatible surfactant and/or a cosolvent, and a removal target; circulating the mixed system; and selectively removing the removal target that has been incorporated into the surfactant and/or cosolvent.

Abstract: The present invention relates to a method for recovering a surfactant from a water-carbon dioxide system comprising at least one type of surfactant, water and carbon dioxide, the method comprising the step of bringing the water-carbon dioxide system into contact with a dehydrating agent to remove water. Furthermore, the present invention relates to a method comprising the steps of installing a device for selectively removing a removal target in a circulation line in which circulated is a mixed system comprising carbon dioxide, a carbon dioxide-compatible surfactant and/or a cosolvent, and a removal target; circulating the mixed system; and selectively removing the removal target that has been incorporated into the surfactant and/or cosolvent.

Abstract: An instrument for coronary artery bypass graft surgery has at least three sets of suction units, respectively provided with a flexible tube; a suction head disposed at an end portion of the flexible tube; a three-way cock mounted on the flexible tube; and a retainer which retains the flexible tube.

Abstract: An antenna device shared by three different waves has a single two-stage collinear antenna constituted by half-wave dipole antennas which are adapted for a vehicle telephone signal and are stacked one upon the other. The device allows an AM-FM radio receiver to receive AM and FM broadcast signals via a first coaxial cable and a vehicle telephone transceiver to receive a telephone signal via a second coaxial cable. A first impedance converting circuit is implemented as a field effect transistor and connected to the base end of the antenna for matching the antenna and the first coaxial cable in the event of reception of the AM broadcast signal. A second impedance converting circuit matches the antenna and the first coaxial cable at the time of reception of the FM broadcast signal. The impedance converting circuits convert the input/output impedances of the AM and FM signals.