A hydraulically actuated fuel injector includes an injector body having at least one actuation fluid inlet, a needle control chamber, a nozzle chamber, and a nozzle outlet that opens to the nozzle cha

A needle valve and a method of manufacturing the needle valve. The needle valve has a metal needle with a leading end that is elongated and tapered so as to provide carefully restricted fluid flow alo

A valve seat having a tubular valve seat wall portion that extends about a frusto-conical valve member that moves longitudinally into the valve seat to close a valve in which the seat and valve member

A plug-type, rising stem needle or shut-off valve for controlling fluid flow comprises a valve housing forming a valve chamber with inlet and outlet ports connecting therewith. A bonnet member with a

A hydraulically-actuated electronically-controlled fuel injector for use with a fuel injection system having an actuating fluid high pressure common rail for conveying an actuating fluid under pressur

The illustrated embodiment teaches a three-way valve system for an ink jet printer. The system has an inlet, a main outlet, a vent, and two needle valves (a shut-off valve and a vent valve) which sit

Needle valves are usually used in flow metering applications, especially when a constant, calibrated, low flow rate must be maintained for some time, such as the idle fuel flow in a carburetor.

A needle valve having improved accuracy and wear characteristics is disclosed in which the valve stem is subjected to a constant force to prevent backlash throughout its entire movement with respect t