Abstract: A spool operation failure due to foreign matter contamination is prevented. A variable displacement compressor 100 includes a first control valve 300 controlling the opening degree of a supply passage 145, a check valve 350, a second control valve 400 controlling the opening degree of a discharge passage 146, and a back-pressure relief passage 147. The second control valve 400 includes a back pressure chamber 410 communicating with an intermediate supply passage 145b1, a valve chamber 420 to which a valve hole 103d and a discharge hole 431a are open and that constitutes a part of the discharge passage 146, a partition member 430 partitioning into the back pressure chamber 410 and the valve chamber 420, and a spool 440 extending through a through hole 432a formed in the partition member 430. The spool 440 has a pressure receiving portion 441 disposed in the back pressure chamber 410, a valve portion 442 disposed in the valve chamber 420, and a shaft portion 443.

Abstract: A spool operation failure due to foreign matter contamination is prevented. A variable displacement compressor 100 includes a first control valve 300 controlling the opening degree of a supply passage 145, a check valve 350, a second control valve 400 controlling the opening degree of a discharge passage 146, and a back-pressure relief passage 147. The second control valve 400 includes a back pressure chamber 410 communicating with an intermediate supply passage 145b1, a valve chamber 420 to which a valve hole 103d and a discharge hole 431a are open and that constitutes a part of the discharge passage 146, a partition member 430 partitioning into the back pressure chamber 410 and the valve chamber 420, and a spool 440 extending through a through hole 432a formed in the partition member 430. The spool 440 has a pressure receiving portion 441 disposed in the back pressure chamber 410, a valve portion 442 disposed in the valve chamber 420, and a shaft portion 443.

Abstract: The whirling vibration of a rotating main shaft is reduced to decrease abnormal wear of a wobble plate rotation preventing mechanism, so that durability is improved. A inner ring 27 of a wobble plate rotation preventing mechanism 21 has a first support portion 52 of which an outer peripheral surface is supported by an inner peripheral surface of a guide hole 2A of a cylinder block 2 and a second support portion 53 of which an inner peripheral surface supports the rotating main shaft via a plain bearing 51, and the first support portion 52 and the second support portion 53 are arranged to overlap within a range from a minimum inclination angle of a swash plate 8 to a maximum inclination angle of the swash plate 8 in an axial direction of a rotating main shaft 5.

Abstract: A variable displacement swash plate compressor comprises a rotating shaft, a swash plate fitted on the rotating shaft to engage the rotating shaft slidably and to be variable in inclination relative to the rotating shaft, thereby rotating synchronously with the rotating shaft, a first spring for forcing the swash plate in the direction decreasing the inclination of the swash plate, a second spring for forcing the swash plate inclined to near the minimum inclination in the direction increasing the inclination of the swash plate, and a damper for countering the short period variation of the inclination of the swash plate inclined to near the minimum inclination.

Abstract: A submerged jet injection nozzle includes a nozzle exit disposed downstream of an orifice section and greater in diameter than the orifice section. The occurrence of cavitation due to a fluid injection is positively promoted so that the crushing effect of the cavitation is utilized fully and the decay in the energy of the injected fluid is reduced thereby increasing the work done by the submerged fluid injection.

Abstract: A surgical nozzle apparatus used for removing an undesired tissue with a jet of pressurized fluid. A handpiece including a fluid injecting nozzle piece and a valve assembly capable of cutting off the supply of the pressurized fluid to the nozzle piece, further includes a suction nozzle opening at a position downstream of the nozzle piece. The suction nozzle is connected to external suction means so that the waste fluid and the separated tissue at a surgically treated part are simultaneously sucked and discharged during the operation.

Abstract: An improved process for producing superfines of metal is disclosed, which comprises reacting a metal halide containing gas with a reducing gas by causing to flow both the stream of a metal halide containing gas and the stream of a reducing gas concurrently but at different velocities so as to form an interfacial instability region in the reaction zone, and nuclei are formed in said instability region whereas said reaction zone is quenched (cooled) to inhibit the excessive growth of said nuclei. Application of a magnetic field to the reaction zone can enhance the degree of fineness and magnetic properties of the superfines thus produced.

Abstract: A turbine-type underwater hydraulic motor includes a hermetically sealed chamber filled with oil, and bearings of rotating parts and a reduction gear unit are sealed in said sealed chamber. A part of the partitions isolating the sealed chamber from the exterior is comprised of a resilient member and thus the water pressure outside the motor and the oil pressures within the sealed chamber are balanced, thereby preventing the leakage of the oil and the entry of the water.

Abstract: The present invention relates to a reciprocating pump in which a plunger is reciprocated by means of a crankshaft, a connecting rod and a crosshead. The reciprocating pump further includes cushioning means which is disposed between the crosshead and the plunger and capable of adjusting its cushioning force and absorbing the plunger stroke, whereby the delivery pressure is adjustable through adjustment of the cushioning force of the cushioning means and the delivery volume or rate is also adjustable through absorption of the plunger stroke by the cushioning means.

Abstract: Disclosed is a tube expander in which a mandrel itself is in the form of a short metal bar and the mandrel is fitted into a cage having loosely fitted therein a plurality of rollers adapted to perform a tube expanding function. The forward end of the mandrel includes a threaded portion formed in the outer surface thereof and engageable with a threaded guide disposed inside the forward end portion of the cage and adapted to be rotatable with the cage and slidable axially thereof, and the rear end of the mandrel is engaged with a mandrel drive which axially slidably rotates the mandrel. A suitable number of shanks may be added to the mandrel drive as occasions demand, whereby the desired tube expanding operation can be performed without the need to apply any propelling force to the mandrel drive but simply by externally applying a turning force to the mandrel drive or the shanks.