| 摘要 |
<p>Hydraulic control valve comprising a tubular casing with side ports for high pressure and exhaust pressure fluids. The casing bore contains three close fitting cylindrical elements mounted in series on a rotary drive shaft having passages which couple the ports respectively to one or more radial passages in the adjacent outer element. As the shaft turns, the radial passages coincide with outlets to pressure control, balance or power lines. Esp. for controlling automatically an injection moulding machine. Compact, robust, simple, free from timers, pressure relays etc. Fundamental cycle variations are readily available by exchanging the valve core.</p> |
