Distributor valve assembly (1) comprising a proportioning valve (10) and a pressure compensator (30). A control piston (32) adjusts the flow cross sections through a first compensator throttle (36a) and through a second compensator throttle (36b) by longitudinal movement thereof.

To provide an oscillating actuator which is capable of easily changing an oscillation start position of a shaft. An oscillating actuator includes an actuator main body 2 having a shaft 4 which is configured to oscillate about an axis L in a predetermined range of angle by means of a compressed air, and a fixing plate 3 for fixing the actuator main body 2 to a load device 30, wherein the actuator main body 2 and the fixing plate 3 are connected together by a connection mechanism 5 so as to be displaceable relative to each other in the rotation direction of the shaft 4 so that an oscillation start position A of the shaft 4 is changed by displacement of the actuator main body 2 and the fixing plate 3 relative to each other.

To provide an oscillating actuator which is capable of easily changing an oscillation start position of a shaft. An oscillating actuator includes an actuator main body 2 having a shaft 4 which is configured to oscillate about an axis L in a predetermined range of angle by means of a compressed air, and a fixing plate 3 for fixing the actuator main body 2 to a load device 30, wherein the actuator main body 2 and the fixing plate 3 are connected together by a connection mechanism 5 so as to be displaceable relative to each other in the rotation direction of the shaft 4 so that an oscillation start position A of the shaft 4 is changed by displacement of the actuator main body 2 and the fixing plate 3 relative to each other.

In accordance with some embodiments herein, a propulsion apparatus includes a power generation unit, and a propulsion device. The propulsion device includes a rotating assembly and a supporting mechanism which allows the rotating assembly to rotate about one or more rotation axes. The rotating assembly includes two or more pressurizer units, one or more rotating arms connected to the two or more pressurizer units and the supporting mechanism, and one or more transfer pipes connected to the two or more pressurizer units to allow one or more materials to move between the two or more pressurizer units.

In accordance with some embodiments herein, a propulsion apparatus includes a power generation unit, and a propulsion device. The propulsion device includes a rotating assembly and a supporting mechanism which allows the rotating assembly to rotate about one or more rotation axes. The rotating assembly includes two or more pressurizer units, one or more rotating arms connected to the two or more pressurizer units and the supporting mechanism, and one or more transfer pipes connected to the two or more pressurizer units to allow one or more materials to move between the two or more pressurizer units.

A hydraulic valve apparatus that is interposed between a hydraulic device and a hydraulic pump and controls supply of oil from the hydraulic pump to the hydraulic device by operating a spool provided in a valve body. Further, the valve body includes traveling spools separately provided for two traveling hydraulic devices, working equipment spools provided corresponding to working equipment hydraulic devices, and two pump oil passages connected to the hydraulic pump via pump ports, and the two traveling spools are separately connected to the pump oil passages at positions at which distances from the pump ports are equal to each other without passing through other spools.