Abstract: An electrohydraulic valve has a valve body with a longitudinal bore and a cylindrical exterior surface. An annular recess extends around the cylindrical exterior surface and the first port extends from the recess to the bore. A filter is formed by a plate that has a plurality of perforations and which is wrapped around valve body in the recess. The plate has a first end section at which a first tab is created and a second end section overlapping the first end section with a slot through which the first tab extends to secure the first and second end sections together. A spool is slideable into different positions within the bore of the valve body to selectively connect and disconnect the first port and a second. An actuator is operably coupled to move the spool into different positions within the bore.

Abstract: A solenoid operated valve has a valve body with a plurality of ports and a spool slideable within the valve body to interconnect the ports in different combinations. An actuator drives the spool into several operating positions. The actuator has a solenoid assembly with an armature that moves within a bore in response to an electromagnetic field. A push member projects from the armature and has a bearing secured thereto. The bearing has a cage that retains a plurality of rollable elements in slots separated by walls that are resilient enabling the rollable elements to be forced into the slots during assembly and thereafter be captured in the cage when the walls return to their original positions. A latch on the cage engages the push member to affix the bearing in place.

Abstract: A solenoid operated valve has a valve body with a plurality of ports and a spool slideable within the valve body to interconnect the ports in different combinations. An actuator includes a solenoid coil assembly and an armature slideably received in the solenoid coil assembly. A bushing has a cylindrical body from which a push member projects into engagement with the spool and from which a coupling shaft extends into an aperture in the armature. A passage is provided in the bushing to allow fluid to flow between opposites sides as the bushing slides in the solenoid coil assembly. The cylindrical body rides in the solenoid coil assembly and has a plurality of external grooves that enable fluid to pass around the body.

Abstract: A solenoid operated valve has a valve body with a plurality of ports and a spool slideable within the valve body to interconnect the ports in different combinations. An actuator drives the spool into several operating positions. The actuator has a solenoid assembly with an armature that moves within a bore in response to an electromagnetic field. A push member projects from the armature and has a bearing secured thereto. The bearing has a cage that retains a plurality of rollable elements in slots separated by walls that are resilient enabling the rollable elements to be forced into the slots during assembly and thereafter be captured in the cage when the walls return to their original positions. A latch on the cage engages the push member to affix the bearing in place.

Abstract: A solenoid operated valve has a valve body with a plurality of ports and a spool slideable within the valve body to interconnect the ports in different combinations. An actuator includes a solenoid coil assembly and an armature slideably received in the solenoid coil assembly. A bushing has a cylindrical body from which a push member projects into engagement with the spool and from which a coupling shaft extends into an aperture in the armature. A passage is provided in the bushing to allow fluid to flow between opposites sides as the bushing slides in the solenoid coil assembly. The cylindrical body rides in the solenoid coil assembly and has a plurality of external grooves that enable fluid to pass around the body.

Abstract: An electrohydraulic valve has a valve body with a longitudinal bore and a cylindrical exterior surface. An annular recess extends around the cylindrical exterior surface and the first port extends from the recess to the bore. A filter is formed by a plate that has a plurality of perforations and which is wrapped around valve body in the recess. The plate has a first end section at which a first tab is created and a second end section overlapping the first end section with a slot through which the first tab extends to secure the first and second end sections together. A spool is slideable into different positions within the bore of the valve body to selectively connect and disconnect the first port and a second. An actuator is operably coupled to move the spool into different positions within the bore.

Abstract: A joystick for manually operating a pair of hydraulic valve members has a bracket to which a handle is attached. A pivot shaft rotationally extends between a pair of legs of the bracket and has a transverse aperture through which a pivot pin attaches the pivot shaft to a base of the joystick. This attachment structure allows the bracket to pivot with respect to the base about two orthogonal axes. A first link for coupling to one hydraulic valve member is pivotally attached to the pivot shaft, while a second link for coupling to another hydraulic valve member is attached by a ball joint to the bracket.

Abstract: A joystick for manually operating a pair of hydraulic valve members has a bracket to which a handle is attached. A pivot shaft rotationally extends between a pair of legs of the bracket and has a transverse aperture through which a pivot pin attaches the pivot shaft to a base of the joystick. This attachment structure allows the bracket to pivot with respect to the base about two orthogonal axes. A first link for coupling to one hydraulic valve member is pivotally attached to the pivot shaft, while a second link for coupling to another hydraulic valve member is attached by a ball joint to the bracket.