Abstract: A proportional solenoid operated pressure reducing control valve includes an elongate cylindrical housing having an axial throughbore between an outer end and an inner end defining an interior chamber. The inner end is receivable in a solenoid, in use. A plurality of axially spaced side port openings proximate the outer end define a cylinder port and a pressure port. A tank opening proximate the outer end defines a tank port. A valve member comprises a cylindrical body movable in the chamber at the outer end for selectively controlling fluid flow through the interior chamber between the tank port and the cylinder port in a neutral position, or modulating the cylinder port between the pressure port and the tank port in a regulated position. The valve member includes an axially extending throughbore. Dividing means in the valve member separate the valve member throughbore to define an outer chamber and a control chamber.

Abstract: A lower cost valve results from the use of a single machined part for a valve housing. The housing is made of a non-magnetic material which can be less expensive and eliminates the requirement for screens or filters in automotive applications. Providing a one-piece plunger and pilot valve with a high guiding length minimizes tilting of the pilot. Further, the one-piece housing allows for one common bore for guiding the plunger with the pilot and a poppet. The two ideal concentric surfaces make the poppet outer diameter concentric to the pilot hole. Finally, the use of an adjustable stroke valve eliminates the need for a separate needle valve, providing further cost savings.

Abstract: An analog proportional pressure control 3-way valve includes an elongate cylindrical valve housing having an axial through bore defining an interior chamber, one end of the housing comprising an end port opening, a plurality of axially spaced side port openings defining an inlet and an outlet, and an axial opposite end comprising a sleeve end receivable in a solenoid, in use. A valve member is movable in the chamber at the port end for selectively controlling fluid pressure through the chamber between the end port opening and the outlet in the neutral position or between the inlet and the outlet in a regulated position. A solenoid plunger is movable in the chamber at the sleeve end and is operatively associated with the valve member for positioning the valve member. A stop is mounted to the housing at the sleeve end for retaining the plunger in the chamber.

Abstract: A lower cost valve results from the use of a single machined part for a valve housing. The housing is made of a non-magnetic material which can be less expensive and eliminates the requirement for screens or filters in automotive applications. A threadable connection connects a tube stop to the valve housing eliminating the requirement of braising in manufacturing. Finally, a one-piece plunger and pilot valve with a high guiding length minimizes tilting of the pilot. The one-piece housing allows for one common bore for guiding the plunger with the pilot and the poppet. The two ideal concentric surfaces make the poppet outer diameter concentric to the pilot hole.

Abstract: A low cost valve results from the use of a single machined part for a valve housing. The housing is made of a non-magnetic material which can be less expensive and eliminates the requirement for screens or filters in automotive applications. A tube stop is threadably connected to the valve housing eliminating the requirement of brazing in manufacturing. Finally, a biasing spring acting on a plunger pin eliminates the requirement for providing a counterbore in the plunger for maintaining the plunger and thus a valve member in the normal or unactuated position.

Abstract: A three position solenoid operated spool type cartridge valve includes a pair of solenoids acting on a valve assembly. The valve assembly comprises a valve sleeve having a valve chamber with a plurality of ports and an outlet. A valve spool is slidably mounted in the valve chamber for controlling flow between the ports. The two solenoid coils are removably mounted in concentrically surrounding relationship to a tube assembly. The tube assembly includes a tube end portion with a convave outer end bore. A sleeve is welded to the tube end portion at the outer end. A plunger armature is slidably received in the sleeve between the tube end portion and a tube stop adapter having a concave inner end. The tube stop adapter includes a central axial bore connected to the concave inner end with the bore being enlarged at an outer end. A rod extends through the tube stop adapter bore and includes one end secured to the armature and the other end being secured to the valve spool.

Abstract: A bidirectional cartridge valve comprises a generally cylindrical valve housing including an end port and a side port each opening into an axial, cylindrical bore defining a valve chamber. A flow control element is movable in the valve chamber between a valve open position to open a flow path between the two ports and a valve closed position to block the flow path between the two ports. The flow control element includes a first passage provided with a first check valve connecting the end port with the valve chamber and a second passage with a second check valve connecting the side port with the valve chamber. A cylindrical pilot seat in the chamber includes a partial, axial bore defining a pilot chamber and an opening through the seat connecting the valve chamber with the pilot chamber. A third passage is provided through the valve housing, provided with a third check valve, connecting the pilot chamber to the side port.

Abstract: A solenoid coil assembly for a solenoid valve includes an electrical coil wound about a valve armature to develop a magnetic field for actuating the armature responsive to an electrical current passing through the coil. A case surrounds the coil. The case has opposite end walls and a top wall, a bottom wall and opposite side walls connected between the end walls. A pair of electrical connectors are connected to opposite ends of the coil and extend outwardly from the top wall. A metal yoke has opposite end walls connected by a top wall and a bottom wall. The yoke is received on the case with their respective end walls, top walls and bottom walls in alignment.