Abstract: A hydraulic drive system that does not cause a decrease in efficiency of actuators, does not hinder an optimal action of devices such as flow adjustment valves, and does not cause any corrosion of water acting as an operating fluid. The system uses water as an operating fluid. The system includes a hydraulic generation apparatus 40 including, a main tank 41, a return path 52, an accessory tank 54, and a water disposal apparatus 56 disposed in a path 57. The operating fluid from structuring devices of the processing apparatuses 10, 20 and 30 flows through the return path 52. The operating fluid flows from the accessory tank 54 to the main tank 41 through the path 57 and the water disposal apparatus 56.

Abstract: The present invention relates to a vane-type rotary machine suitable for use in applications where a low-viscosity fluid such as water is used as a working fluid. According to the present invention, a vane-type rotary machine having a rotor (11) mounted with vanes and rotatably housed in a cam casing (10) includes a motor supply opening (or pump discharge opening) (30) for a working fluid, a motor return opening (or pump suction opening) (20) formed in the cam casing for a working fluid, and branch flow passages (23, 25, 33 and 35) branched from the motor supply opening (or pump discharge opening) and the motor return opening (or the pump suction opening) and communicating with vane chambers (22, 24, 32 and 34). The distances of the branch flow passages are identical to each other.

Abstract: A method for producing a ferrule having a plurality of fiber holes for insertion of optical fibers formed between two pin holes for insertion of guide pins, and a ferrule produced by the method. The method comprises a step of injecting a synthetic resin in a mold for forming the ferrule while holding a plurality of pins with a Young's modulus of(22 to 59)×1010N/m2 for forming the fiber holes at two points separated by a distance of 1.5 to 4 mm in a lengthwise direction of the pins.

Abstract: A hydraulic drive system that does not cause a decrease in efficiency of actuators, does not hinder an optimal action of devices such as flow adjustment valves, and does not cause any corrosion of water acting as an operating fluid. The system uses water as an operating fluid. The system includes a hydraulic generation apparatus 40 including, a main tank 41, a return path 52, an accessory tank 54, and a water disposal apparatus 56 disposed in a path 57. The operating fluid from structuring devices of the processing apparatuses 10, 20 and 30 flows through the return path 52. The operating fluid flows from the accessory tank 54 to the main tank 41 through the path 57 and the water disposal apparatus 56.

Abstract: A ferrule for a multi optical connector is formed by filling a cavity in a mold with melted resin and the ferrule is pushed out of the cavity by pressing a face on the side in which an adhesive pouring port is formed of the formed ferrule. Two positions on both outer sides with respect to a center line in the arrangement direction of the fiber or three or more positions including those two positions, near a joint end face on a face on the side in which the adhesive pouring port is formed, are pressed.

Abstract: In an optical connector ferrule comprising an insertion opening through which one end of a coated optical fiber with the coating removed is inserted. A guide groove is provided for guiding the bare fiber of the optical fiber. A fiber hole is provided for inserting therein the bare fibers guided by the guide groove. An injection port is provided for injecting therein adhesive for securing the coated optical fiber to the ferrule. Guide surfaces are provided for guiding the bare fiber to the guide grooves at sides of the guide groove. In the similar optical connector ferrule, there is provided an enlarged portion extending forwardly from a leading edge of the injection port in a fiber inserting direction and reaching a filling space into which the adhesive is filled. Further, a ceiling surface of the enlarged portion is inclined downwardly forwardly from the injection port.

Abstract: In a ferrule for a multi fiber optical connector of the multi stages where at least two layers of guide grooves and fiber holes are laminated, a distance of from a straight line that connect middle points between the center axes of the fiber holes that make up a fiber hole array at one end side in a laminating direction and the center axes of the fiber holes that make up a fiber hole array at another end side to an upper side of the entry is longer than a distance of from the straight line to a lower side of the entry. A ceiling of the entry is notched so that an inclination of the multi fiber tape is not regulated by the upper side of the entry when a leading end of each of the optical fibers is pressed against the corresponding guide groove while the multi fiber tape inserted from the entry is inclined toward the upper side of the entry. In a method of manufacturing a multi fiber optical connector, the multi fiber tape is inserted into the ferrule from the entry while being inclined obliquely downward.

Abstract: The present invention relates to a vane rotary machine such as a vane pump or a vane motor. The vane rotary machine has a rotor (15) supporting vanes (60) thereon and housed in a cam casing (10), and a main shaft (40) attached to the rotor (15) and rotatably supported by a bearing assembly (200, 250). A working fluid from a discharge port (13) is branched and led to the bearing assembly (200, 250) by a fluid path (180). The main shaft (40) has a working fluid introduction recess (220) defined in a region thereof in which the bearing assembly (200, 250) is disposed, and the main shaft has a reduced diameter in the working fluid introduction recess. The working fluid is introduced into the working fluid introduction recess (220).

Abstract: A ferrule for optical connector has a block-shaped body, and multiple fiber holes are formed in this body. A filler pit for filling adhesive is formed in the body, and extends from an opening formed on an outer surface of the body toward the inside of the body to communicate to inner ends of the fiber holes inside the body. The multiple fiber holes are formed as multiple stages. The inner ends of these fiber holes on the second and upper stages are positioned in a range of the opening while the opening is viewed as the upper side. Alternatively, guide grooves are provided so as to communicate to the ends of the fiber holes for guiding optical fibers into the fiber holes, and ends of these guide grooves are positioned in the range of the opening.

Abstract: A ferrule for a multi optical connector is formed by filling a cavity in a mold with melted resin and the ferrule is pushed out of the cavity by pressing a face on the side in which an adhesive pouring port is formed of the formed ferrule. Two positions on both outer sides with respect to a center line in the arrangement direction of the fiber or three or more positions including those two positions, near a joint end face on a face on the side in which the adhesive pouring port is formed, are pressed.

Abstract: Disclosed is a double-sided ferrule manufacturing method, wherein two ferrules are prepared, each ferrule having in one end surface an insertion opening allowing insertion of a fiber ribbon, a plurality of fiber minute holes being arranged ahead of the insertion opening, the fiber minute holes allowing insertion of the individual optical fibers of the fiber ribbon inserted into the insertion opening, the other end surface of each ferrule being formed as a joint end surface in which the end surfaces of the optical fibers inserted into the fiber minute holes are exposed, each of the two ferrules being cut at some midpoint in the fiber ribbon inserting direction along the direction in which the fiber minute holes are arranged to obtain two joint end surface side cut ferrules (members), the cut surfaces of the two members being caused to butt each other to be glued (connected) together, whereby a double-sided ferrule is manufactured which has joint end surfaces on the opposite sides of the glued surfaces (connect

Abstract: In a ferrule for a multi fiber optical connector of the multi stages where at least two layers of guide grooves and fiber holes are laminated, a distance of from a straight line that connect middle points between the center axes of the fiber holes that make up a fiber hole array at one end side in a laminating direction and the center axes of the fiber holes that make up a fiber hole array at another end side to an upper side of the entry is longer than a distance of from the straight line to a lower side of the entry. A ceiling of the entry is notched so that an inclination of the multi fiber tape is not regulated by the upper side of the entry when a leading end of each of the optical fibers is pressed against the corresponding guide groove while the multi fiber tape inserted from the entry is inclined toward the upper side of the entry. In a method of manufacturing a multi fiber optical connector, the multi fiber tape is inserted into the ferrule from the entry while being inclined obliquely downward.

Abstract: A method of producing a ferrule having a plurality of fiber holes for insertion of optical fibers formed between two pin holes for insertion of guide pings, and a ferrule produced by the method. The method comprises a step of injecting a synthetic resin in a mold for forming the ferrule while holding a plurality of pins with a Young's modulus of (22 to 59)×1010N/m2 for forming the fiber holes at two points separated by a distance of 1.5 to 4 mm in a lengthwise direction of the pins.

Abstract: In an optical connector ferrule comprising an insertion opening through a bare fiber, from which the coating is removed, of one end of a coated optical fiber is inserted, a guide groove for guiding the bare fiber inserted through the insertion opening, a fiber hole into which the bare fibers guided by the guide groove is inserted, and an injection port through which adhesive for securing the coated optical fiber to the ferrule is injected, guide surfaces for guiding the bare fiber to the guide grooves are formed at sides of the guide groove. In the similar optical connector ferrule, there is provided an enlarged portion extending forwardly from a leading edge of the injection port in a fiber inserting direction and communicated with a filling space into which the adhesive is filled. Further, a ceiling surface of the enlarged portion is inclined downwardly forwardly from the injection port.

Abstract: A hydraulic servovalve controls the direction of flow of a working fluid and a flow rate of a working fluid between a plurality of ports. The hydraulic servovalve includes a spool axially movably disposed in a valve body for changing a direction of a working fluid and varying a flow rate of the working fluid, a sleeve disposed in the valve body and having a spool hole for housing the spool, a pair of hydrostatic bearings disposed in the sleeve around respective opposite end portions of the spool, and a plurality of windows defined in the sleeve as control orifices for controlling a flow rate of a working fluid. The hydraulic servovalve further includes a fluid passageway communicating between the supply port and the control port through one of the windows, and a fluid passageway communicating between the control port and the return port through the other of the windows.