Abstract: A speed change device that transmits power input to an input shaft to an output shaft while changing a speed ratio to a plurality of speeds, the speed change device including: a planetary gear mechanism including a sun gear, a ring gear, and a carrier that rotatably supports a plurality of pinion gears, each of the plurality of pinion gears meshing with at least one of the sun gear and the ring gear; and a brake including a brake hub fixed to the carrier and a friction plate fitted to an outer circumference of the brake hub, the brake being capable of holding the carrier stationary to a case.

Abstract: A speed change device that transmits power input to an input shaft to an output shaft while changing a speed ratio to a plurality of speeds, the speed change device including: a planetary gear mechanism including a sun gear, a ring gear, and a carrier that rotatably supports a plurality of pinion gears, each of the plurality of pinion gears meshing with at least one of the sun gear and the ring gear; and a brake including a brake hub fixed to the carrier and a friction plate fitted to an outer circumference of the brake hub, the brake being capable of holding the carrier stationary to a case

Abstract: A control valve having a rotor for communicating outlet port or ports selectively to fluid drain port or to inlet port so as to change flow direction of fluid to be supplied to fluid operated apparatus. The control valve comprises first and second pistons inserted in a hollow space of the rotor and a compression spring arranged between the pistons. At the operation position(s) of the rotor or the valve, the first piston which is biased by the compression spring oscillatingly blocks and reopens fluid passage formed within the rotor outside the first piston for communicating the inlet port to the outlet port(s) under the influence of the compression spring and fluid pressure of the outlet port(s) from which fluid is constantly drained with a small rate through the valve. Fluid pressure of the outlet port may be varied by varying the force of the compression spring by an advance of the second piston.