A valve to control fluid of high volume and pressure comprising a continuously balanced hollow plunger disposed within an annularly enlarged chamber that controls fluid flow by moving radial slots and ports in its peripheral wall back and forth across seals, the plunger being continuously balanced i
A valve to control fluid of high volume and pressure comprising a continuously balanced hollow plunger disposed within an annularly enlarged chamber that controls fluid flow by moving radial slots and ports in its peripheral wall back and forth across seals, the plunger being continuously balanced in any position by a double-rodded piston assembly comprising a piston, a ported operator rod and actuator rod, and a balance chamber within a sealed piston cylinder tube that allows the line media to flow through, out of, and around the plunger, through the operator rod and through and out of the actuator rod and into the balance chamber creating a complete continuous balancing effect on the plunger in any position, and operator means are only required to overcome seal friction and path resistance to move the plunger to selected position.
대표청구항▼
[ What is claimed is:] [1.] A valve for controlling the flow of liquid under pressure, comprising:A valve housing, having a longitudinal opening which is closed at both ends,a disc closing the valve housing at one end,inlet and outlet ports communicating with said housing opening at longitudinally s
[ What is claimed is:] [1.] A valve for controlling the flow of liquid under pressure, comprising:A valve housing, having a longitudinal opening which is closed at both ends,a disc closing the valve housing at one end,inlet and outlet ports communicating with said housing opening at longitudinally spaced places therealong,a valve plunger slidably received within said housing opening and recipricable axially thereof, said plunger being in the form of a tubular cylinder with a flow opening at one end and cooperating with the flow of liquid through the inlet port and a plurality of flow slots and ports disposed in the defining wall of said plunger and cooperating with the said outlet port, whereby in one position said plunger communication between said inlet and outlet ports is blocked, and in the other plunger position communication between said inlet and outlet ports is effected, a plunger passage port longitudinally through said plunger to allow the flow of liquid through said flow opening, said flow slots and ports, and through said plunger so that the fluid communicates with both ends of said plunger and biases said plunger in any position,a two-ended operator rod with one end extending into said opposite end of said plunger for effecting shifting action of said plunger to selected positions and permitting substantially unrestricted flow of liquid through and out said opposite end of said plunger and out to surround the exterior of said plunger at said opposite end and thereby provide a balancing effect to minimize liquid resistance to plunger shifting action and the other end of said operator rod extending perpendicular to and through a housing plate sealing the opposite end of the valve housing and through a piston cylinder tube disposed axially from said housing closure plate, and said operator rod having a passage port longitudinally through said operator rod and communicating with the passage port of the plunger and the piston cylinder tube and said operator rod having a plurality of radial ports communicating with said operator rod passage port to allow said fluid to flow from said opposite end of said plunger through said radial ports and through said operator rod passage port and cooperating therewith,said housing closure plate disposed at said opposite end of said housing to seal said opposite end of said housing and adapted to slidably accept said operator rod through said housing closure plate,a seal ring and o-ring disposed at said opposite end of said valve housing to seal said housing closure plate and said housing,a pair of circular lands on the inter-wall surface of said valve housing being spaced apart and disposed on opposite sides of said outlet port and cooperating with the exterior surface of said plunger,an annularly enlarged chamber formed in said valve housing between said pair of lands,a pair of seals disposed between said pair of lands and the exterior surface of said plunger to seal and prevent fluid flow from said inlet port to said outlet port except through the cylinder plunger,said piston cylinder tube disposed axially from said housing closure plate having a longitudinal opening of substantially uniform interior diameter along its entire length and closed at one end by said housing closure plate and closed at the opposite end by a cylinder closure plate and said cylinder piston tube adapted to slidably accept said operator rod and an actuator rod recipricable axially thereof and within said piston cylinder tube,said actuator rod of smaller diameter than said operator rod and at one end extending axially from said opposite end of said operator rod within said piston cylinder tube and extending perpendicular to and through said cylinder closure plate, and providing for said operator rod passage port extending slightly longitudinally into said actuator rod and cooperating with said operator rod passage port, and a plurality of actuator rod radial ports disposed in said actuator rod and cooperating with said operator rod passage port and to allow the flow of fluid continuously through said plunger, said operator rod and said actuator rod and into said piston cylinder tube,a balancing chamber formed within said piston cylinder tube between the exterior surface of said actuator rod and the interior surface of said piston cylinder tube and cooperating with actuator rod radial ports and to allow the flow of fluid into said piston cylinder tube and to communicate with and completely balance the pressure against both ends of the said plunger and to keep said plunger in a balanced condition in any position,a piston disposed at the juncture of said operator rod and said activator rod adapted to slide within said piston cylinder tube and to effect positioning of said plunger,a retaining nut disposed on said actuator rod to bias and secure said piston against said operator rod,a vent chamber disposed between the exterior surface of said operator rod and the interior surface of said piston cylinder tube and a plurality of radial vent ports cooperating with said vent chamber to exhaust air to the atmosphere in the slidable stroke of the said piston,said cylinder closure plate disposed at the opposite end of said cylinder piston tube to seal said cylinder piston tube and bored to slidably accept said actuator rod perpendicularly and through said cylinder closure plate,activator rod seals disposed within said piston cylinder tube at said cylinder closure plate end to seal said cylinder closure plate to said piston cylinder tube,an operator means disposed at the opposite end of said actuator rod to urge said plunger to selected position.
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