Abstract: The present invention provides a flexible tube used for an endoscope and the like; an endoscopic medical apparatus that uses the flexible tube; and a resin composition for top coat layer used for the flexible tube. The flexible tube includes a flexible tube substrate that has a cylindrical shape and flexibility; a resin layer that covers the flexible tube substrate; and a top coat layer that covers the resin layer, in which the top coat layer contains a polymer compound derived from monomers including the following A to C.

Abstract: A flexible channel to be incorporated into an endoscopic insertion portion having a flexible portion at least in part of its length, for the purpose of providing a flexible passage internally of the endoscopic insertion portion. The flexible channel is composed of a flexible tube with a helical groove on and around its outer periphery, and a reinforcing coil fitted in the helical groove on the flexible tube. At the root of the helical groove, angular projections are formed at intervals in the longitudinal direction and the reinforcing coil is tightly pressed tightly against the angular projections.

Abstract: A mechanical seal device for obtaining appropriate sliding properties under any conditions, such as a pressure of seal is low or high. Both first grooves 463 and second grooves 464 are formed on a sliding face 46 of a stationary ring 46. The first grooves which are not in communication externally and act for reducing contact resistance of a sliding face by a dynamic pressure action when a rotary shaft rotates, the second grooves act for reducing the contact resistance of the sliding face constantly by introducing a pressure from external. Thus, a mechanical seal device which is available to seal sealed fluid under an appropriate dry contact status wherein a sliding face load is reduced in any condition can be provided.

Abstract: A flexible channel to be incorporated into an endoscopic insertion portion having a flexible portion at least in part of its length, for the purpose of providing a flexible passage internally of the endoscopic insertion portion. The flexible channel is composed of a flexible tube with a helical groove on and around its outer periphery, and a reinforcing coil fitted in the helical groove on the flexible tube. At the root of the helical groove, angular projections are formed at intervals in the longitudinal direction and the reinforcing coil is tightly pressed tightly against the angular projections.

Abstract: An endoscope comprises: a rubber member having a slide area with another member constituting the endoscope, wherein polyalkylsiloxane is coated over the slide area of the rubber member.

Abstract: An optical lens assembly containing a plural number of lens elements for an optical system to be incorporated into a tip end portion of an endoscopic insertion instrument. Of a plural number of lenses which constitute an optical system, a metal film layer is formed on confronting outer peripheral surface portions of at least two adjacently located lenses, outside respective effective lens areas, and the two adjacently located lenses are assembled and fixedly bonded together by applying solder to the outer peripheral surface portions with a metal film layer.

Abstract: An ultrasonic cleaning apparatus of the present invention has a cleaning vessel which is made of a synthetic resin, while an ultrasonic vibration units are respectively disposed to face a hand control part, a top end, and a connector of an endoscope which is contained in the cleaning vessel. The ultrasonic vibration units individually have a diaphragm which is disposed at an opening of the cleaning vessel and ultrasonic vibrators which are adhered at the bottom of the diaphragm. An elastic body is provided between the cleaning vessel and the diaphragm.

Abstract: An optical lens assembly containing a plural number of lens elements for an optical system to be incorporated into a tip end portion of an endoscopic insertion instrument. Of a plural number of lenses which constitute an optical system, a metal film layer is formed on confronting outer peripheral surface portions of at least two adjacently located lenses, outside respective effective lens areas, and the two adjacently located lenses are assembled and fixedly bonded together by applying solder to the outer peripheral surface portions with a metal film layer.

Abstract: In an endoscope apparatus, a suction button is detachable from a manual control part, and rubber parts such as O-rings and a knob are attached to the suction button. The rubber parts are made of a perfluoromonomer rubber material that is obtained by vulcanizing a material having a perfluoromonomer structure in which an average molecular weight is not greater than 2000. Thus, the rubber parts have excellent chemical resistance, heat resistance and mechanical strength. Therefore, the suction button can be both disinfected with new types of disinfectant having powerful oxidizing properties and sterilized in an autoclave.

Abstract: An anti-fogging lens device, having a plural number of optical glass lens elements mounted within a lens barrel, including a first lens element located in a foremost position on the side of a subject and a second lens element located behind and at a space from the first lens element. A spacer ring is fitted in the lens barrel to set apart the first and second lens elements by a gap space of a predetermined width. The spacer ring is formed of a material having higher thermal conductivity than the lens elements and, on the inner peripheral side thereof, provided with a moisture depositing surface which is formed in a non-flat shape to increase its surface area. The lens barrel is fitted in a cylindrical member, and a seal pocket, to be packed with a seal material, is formed between the lens barrel and the cylindrical member to stop clearances between these two members with a secure hermetical seal.

Abstract: An apparatus including a cylindrical housing mounting an upper cylindrical housing slidably thereto to vary a spacing between an entrance of the upper cylindrical housing to a series of cutting blades. The cutting blades are mounted to a rotating shaft of an electric motor, with an exhaust conduit positioned between the electric motor and the cutting blades for directing cut hair and debris exteriorly of the housing, with the conduit associated with a source of vacuum, and wherein the conduit includes sliding doors for varying the degree of vacuum directed to the conduit. Alternative configurations include a self-enclosed housing with the vacuum source defined by impeller blades mounted within a lowermost portion of the housing underlying a porous bag with the housing separable to gain access to the porous bag utilizing either a direct drive for the impeller blades, or alternatively a gear drive to circumvent the porous bag.