A hydraulic oil control valve is coaxially disposed with a rotational axial of a valve timing adjustment device. The hydraulic oil control valve includes a sleeve, a spool slidably moving in an axial direction within the sleeve, and a filter member configured to capture foreign matters contained in the hydraulic oil. The sleeve includes an inner sleeve and an outer sleeve defining therein an axial hole extending in the axial direction. A space between the axial hole and the inner sleeve in a radial direction serves as a hydraulic oil supply passage. The filter member is disposed in the space to overlap with at least one of internal members in the inner sleeve when viewed in the radial direction.

A hydraulic oil control valve is coaxially disposed with a rotational axis of a valve timing adjustment device. The hydraulic oil control valve includes a sleeve and a spool sliding in an axial direction within the sleeve. The spool has an inner space serving as a drain passage through which the hydraulic oil discharged from a phase shifting portion flows. The spool defines a drain inlet that guides the hydraulic oil discharged from the phase shifting portion into the drain passage. At least one of the sleeve or the spool defines an opening through which the hydraulic oil in the drain passage is discharged from the hydraulic oil control valve. A protrusion is formed between the drain inlet and the opening to extend radially inward beyond the drain inlet.

The present disclosure relates to a valve assembly for controlling flow. The valve body has an inlet end and an outlet end. A piston is positioned within the valve body and is movable between an open position to open the valve body and a closed position to close the valve body. A spring is mounted between the piston and a spring adjustment member. A portion of the spring adjustment member is accessible through the inlet end of the valve body so as to be engageable by a tool to facilitate rotation of the spring adjustment member to vary compression of the spring to set a spring pressure rating.

A modular valve assembly includes a bonnetless main core, a first releasable connection, and a second releasable connection. A first inlet end connection includes a first inlet end flow passage. The first inlet end flow passage includes a curved portion that changes a direction of the first inlet end flow passage between 30 and 120 degrees. A second inlet end connection includes a second inlet end flow passage. The second inlet end connection passage is substantially straight. A first outlet end connection includes a first outlet end flow passage. The first outlet end flow passage includes an angled portion. A second outlet end connection passage includes a second outlet end flow passage. The first and second inlet end connections and the first and second outlet end connections are rapidly reconfigurable to form a variety of valve configurations.

A valve assembly includes a valve body defining a cylindrical passage therein about an axis. An inlet port is defined in or near a first end of the valve body. First and second outlet ports are defined in the valve body extending radially outward from the cylindrical passage. A cylindrical valve spool having a central passage is positioned within, and sealingly engaged with, the cylindrical passage. The valve spool is moveable along the axis among: a first position wherein the inlet port is in fluid communication with the first outlet port but not the second outlet port, a second position wherein the inlet port is in fluid communication with the second outlet port but not the first outlet port, and an intermediate position between the first and second positions wherein the inlet port is in fluid communication with both of the first and second outlet ports.

A unitized valve body for use in an automatic transmission includes a plurality of valve bores and a plurality of hydraulic passages. Each valve bore is configured to receive a valve. The plurality of hydraulic passages are in fluid communication with the valve bores and arranged parallel to each other. The plurality of valve bores extend normal to the hydraulic passages and are arranged above and below the hydraulic passages.

A spool is slidably located in a slide hole of a first housing. A second housing forms a servo chamber that is coaxial with the slide hole. A sleeve is slidably located in the servo chamber. A nut is fixed to a piston that is slidably fitted in the sleeve. An electric motor rotates a screw shaft screwed with the nut. The second housing includes an input port and a drain port. A first pressure chamber communicates with the input port. In a balanced state where forces applied to the sleeve from both sides are balanced, a second pressure chamber is blocked from the input port and the drain port by the piston. From the balanced state, when the piston shifts, the second pressure chamber comes into communication with the input port or the drain port.

A device for controlling the flow of a fluid through a conduit from an upstream side of the device to a downstream side of the device. The device includes an upstream valve casing defining an inlet, a downstream valve casing defining an outlet aperture, and a valve core secured between the upstream valve casing and the downstream valve casing. The upstream valve casing, the downstream valve casing and the valve core are formed as discrete parts. The valve core includes a housing defining a control volume. The valve member is mounted on the housing and positioned on the upstream side of the outlet aperture, the valve member being arranged to move reciprocally to selectively open and close the outlet aperture, thereby controlling flow of the fluid through the outlet aperture.

A downhole tool control system for a drill string rotary steerable tool that includes a body having an inner chamber, a piston gallery extending between the inner chamber and a piston port, and an exhaust gallery extending between the inner chamber and an exhaust port. A spool in the inner chamber is movable into a plurality of positions to direct and control the timing and duration of the flow of drilling fluid to energize pistons of the rotary steerable tool, and to de-energize the pistons. The spool includes a first passage in fluid communication with a drilling fluid inlet port but not the exhaust port, and a second passage in fluid communication with the exhaust port but not the drilling fluid inlet port.

A clip filter for a hydraulic valve, the clip filter comprising a carrier frame; and filter elements received in the carrier frame, wherein the carrier frame is configured annular and includes a clip filter lock, wherein a first end of the carrier frame and a second end of the carrier frame are engageable with each other for closing the clip filter, wherein the first end of the carrier frame includes a lug shaped clip element and the second end of the carrier frame includes a recess that is complementary to the lug shaped clip element, and wherein a clip filter lock is configured for a maximized opening force.