A needle valve-related arrangement with a rotating or rotatable spindle in an enclosure or a valve housing, whereby rotary movement of said spindle in one direction causes movement of a first valve pa

A armature needle valve assembly for a gasoline fuel injector comprises a needle for contacting and separating from a valve seat. An armature, movable in a first direction and a second direction, caus

A hydraulic vehicle jack including a novel release valve is disclosed. The jack is of the type having a high pressure cylinder, a ram partially extensible from and retractable into the cylinder, and a

A spray system with an improved valve assembly for various liquid spray applications is provided. The improved needle valve assembly includes a variable orifice and a fixed orifice for enhanced contro

A fluid-operated needle valve having a fluid displaceable actuator reciprocable in one housing and a needle valve reciprocable in another housing. The two housings are detachably secured to each other

A nozzle of a dyestuff applicator has a cylindrical valve housing formed with an orifice obstructable by the tip of an electromagnetically displaceable needle which controls the outflow of dyestuff fr

A needle valve having improved economy of manufacture and assembly is disclosed in which the tapered end of the needle moves axially with respect to a valve seat having a cylindrical opening but does

A carburetor comprising a fuel/air induction passage, a secondary orifice communicating with the induction passage, and a fuel supply system operable to supply fuel from a source of fuel to the second