Abstract: A proportional motion control valve includes an electro-mechanical actuator that provides an infinitely controlled pressure setting in response to an electric signal applied to the electro-mechanical actuator. In another aspect, a proportional motion control valve includes a pilot-operated valve disposed intermediately with respect to a cage and a valve body to fluidly isolate an internal cavity of the valve body from a bore of the cage. The pilot-operated valve is subjected to a hydraulic opening force of pilot fluid that is present in the bore of the cage. A spring is disposed within the internal cavity of the valve body and arranged to subject the pilot-operated valve to a closing spring force.

Abstract: A proportional motion control valve includes an electro-mechanical actuator that provides an infinitely controlled pressure setting in response to an electric signal applied to the electro-mechanical actuator. In another aspect, a proportional motion control valve includes a pilot-operated valve disposed intermediately with respect to a cage and a valve body to fluidly isolate an internal cavity of the valve body from a bore of the cage. The pilot-operated valve is subjected to a hydraulic opening force of pilot fluid that is present in the bore of the cage. A spring is disposed within the internal cavity of the valve body and arranged to subject the pilot-operated valve to a closing spring force.

Abstract: A proportional motion control valve includes an electro-mechanical actuator that provides an infinitely controlled pressure setting in response to an electric signal applied to the electro-mechanical actuator. In another aspect, a proportional motion control valve includes a pilot-operated valve disposed intermediately with respect to a cage and a valve body to fluidly isolate an internal cavity of the valve body from a bore of the cage. The pilot-operated valve is subjected to a hydraulic opening force of pilot fluid that is present in the bore of the cage. A spring is disposed within the internal cavity of the valve body and arranged to subject the pilot-operated valve to a closing spring force.

Abstract: A proportional motion control valve includes an electro-mechanical actuator that provides an infinitely controlled pressure setting in response to an electric signal applied to the electro-mechanical actuator. In another aspect, a proportional motion control valve includes a pilot-operated valve disposed intermediately with respect to a cage and a valve body to fluidly isolate an internal cavity of the valve body from a bore of the cage. The pilot-operated valve is subjected to a hydraulic opening force of pilot fluid that is present in the bore of the cage. A spring is disposed within the internal cavity of the valve body and arranged to subject the pilot-operated valve to a closing spring force.

Abstract: A hydraulic system has first and second functions in which separate control valves govern the flow of fluid between actuators and both a supply conduit and a return conduit. The second function is connected to a load sense passage. When pressure in the load sense passage exceeds a given level an anti-stall valve opens a restricted path between the supply and return conduits. Fluid flow through that restricted path reduces a likelihood that a prime mover driving the pump of the hydraulic system will stall. When only the first function is active the anti-stall valve is closed and does not affect the supply of fluid to that function.

Abstract: A plug is provided for temporarily closing an aperture of a manufactured article prior to use to protect against debris entering the aperture. The plug has a first portion that fits into the aperture and a second portion that extends outside the aperture covering part of the exterior surface of the manufactured article. A band, serving as a paint mask, is attached to and extends radially outward from the exterior perimeter of the second portion, thereby further covering the exterior surface of the manufactured article. The plug is inserted into the aperture prior to painting and the band is torn away from the remainder of the plug after painting. The remainder of the plug can be removed after the paint has completely dried without producing paint particles which could contaminate the workplace or fall into the aperture.