Abstract: An endoscope capable of preventing a liquid in a liquid path from being sucked up and injected together with a gas at the time of an air supply operation. In an endoscope including a liquid path through which a liquid passes and a gas path through which a gas passes, and in which a joining recessed portion in which the liquid and the gas join is formed in a distal end portion, one end side of the liquid path and one end side of the gas path communicate with the joining recessed portion, and a size of a first communication hole between the gas path and the joining recessed portion is made larger than a size of a second communication hole between the liquid path and the joining recessed portion.

Abstract: Provided is an endoscope capable of suppressing the displacement of a movable optical frame due to bending of a bending portion. An endoscope according this embodiment includes an insertion portion that includes a distal end portion, a bending portion, and a soft portion in order from the distal end side, a movable optical frame (37) that is built in the distal end portion and capable of advancing and retreating in an axial length direction of the insertion portion, an operation coil (13) that is connected to the movable optical frame (37) and capable of advancing and retreating in the axial length direction of the insertion portion, and a protection coil (44) through which the operation coil (13) is inserted and which penetrates at least the bending portion.

Abstract: A joint structure of a steel pipe and a metal pipe includes a socket; and a thermosetting resin, the steel pipe including a first joining end having a flat portion of the outer surface of the first joining end adjacent to the base, and an uneven portion of the outer surface of the first joining end adjacent to the front end, the socket covering the first joining end, the metal pipe including a second joining end, the second joining end being interposed between the socket and the first joining end, the first joining end being joined to the second joining end by crimping while the thermosetting resin is present in the gap between the inner surface of the socket and the outer surface of the second joining end and between the outer surface of the first joining end and the inner surface of the second joining end.

Abstract: A structure connecting dissimilar metal tubes is a bellows tube and a metal tube made of stainless steel and aluminum respectively. The bellows tube has a reinforcement portion on its outer surface. The structure includes a nipple, the reinforcement portion, and a crimp collar fitted in that order to the outside of a straight tube portion of the bellows tube. The nipple is joined to the reinforcement portion and the metal tube. A sleeve is joined to the metal tube and the crimp collar. The nipple is bonded to the inner surface of the metal tube with a resin. End faces of the reinforcement portion and the crimp collar are in contact with or located close to an end face of the metal tube.

Abstract: A connection structure for connecting dissimilar metal tubes includes a metal bellows tube (A) having a reinforcement portion (3) disposed on the outer surface of the bellows (5), and a metal tube (B) composed of a material different from that of the bellows tube, the metal bellows tube (A) being integrally connected to the metal tube (B). A connection section on the bellows tube side includes a straight tube portion (1) of the bellows tube (A), a nipple (2), the reinforcement portion (3), and a crimp collar (4), being fitted and secured to each other in that order from the inside of the tube. The nipple (2) has a base (2-1) joined to the reinforcement portion (3) and a connection end (2-2) extending to the metal tube (B) side farther than an end face of the crimp collar (4).

Abstract: A joint structure of a steel pipe and a light metal pipe includes a socket; and a thermosetting resin, the steel pipe including a first joining end having a flat portion of the outer surface of the first joining end adjacent to the base, and an uneven portion of the outer surface of the first joining end adjacent to the front end, the socket covering the first joining end, the light metal pipe including a second joining end, the second joining end being interposed between the socket and the first joining end, the first joining end being joined to the second joining end by crimping while the thermosetting resin is present in the gap between the inner surface of the socket and the outer surface of the second joining end and between the outer surface of the first joining end and the inner surface of the second joining end.

Abstract: A roll of a winding equipment in a rolling factory is formed of a roll body, a hardened buildup substrate formed on a surface of the roll body, and a carbide-particle-dispersed-type autogenous-alloy-sprayed layer having a thickness of at least 0.5 mm and formed on the substrate. The autogenous-alloy-sprayed layer contains 3-60% by weight of carbide particles or complex carbide particles. The carbide particles or complex carbide particles have a particulate shape or a leaf shape with a size of 3-300 .mu.m. The roll can exhibit good abrasion resistance and plate flaw resistance, and good conveyance property for a passing plate material.

Abstract: A data transmitting/receiving apparatus comprises a master clock signal and a slave clock signal which differ in phase with each other according to a basic clock signal. Serial data is input according to the produced master clock signal or slave clock signal, a protocol process is applied to the input serial data, and the serial data subjected to the protocol process is output according to the master clock signal or the slave clock signal. A start delimiter detecting signal is generated when a start delimiter indicating the first frame is detected in the input serial data and phases are exchanged between the master clock signal and the slave clock signal when there arises a shift on a bit boundary of the serial data when the start delimiter detecting signal is generated.

Abstract: A pulsation-absorbing flexible pipe being provided with a throttling material at each end of connection metal fittings arranged at both ends of a flexible pipe, and a throttling means, which has a bore of a diameter smaller than that of the flexible pipe, inside of a bore in the flexible pipe, thereby efficiently absorbing pulsation of a pressure fluid discharged from a pressure fluid-feeding device in a pressure fluid device.