FLUID PRESSURE CONTROLLED POWER UNIT

摘要

An air powered, oil controlled power unit including a cylinder having a plunger and control valve mounted for reciprocation therein. Air from a supply source pressurizes a liquid within the plunger for displacement thereof, upon opening of a control valve by air pressure, by permitting the oil to flow from within the plunger into the cylinder. Closing of the valve immediately stops plunger displacement. The unit is provided with a displaceable, automatically controlled safety latch and a leg member to prevent rotation of the plunger relative to the cylinder. A float assembly cooperates with the valve to prevent elevation of the plunger when the oil level within the unit drops below a predetermined point.