초록 ▼

A high pressure fluid valve includes a tubular portion with a valve seat on its end and a closure element for engaging the valve seat. A piston carries either the tubular portion or the closure element as a movable valve member, with the other being fixed. A first fluid chamber is provided adjacent

A high pressure fluid valve includes a tubular portion with a valve seat on its end and a closure element for engaging the valve seat. A piston carries either the tubular portion or the closure element as a movable valve member, with the other being fixed. A first fluid chamber is provided adjacent the valve seat and a second fluid chamber is spaced therefrom adjacent the other end of the movable valve member. When the movable valve member is actuated, one of the fluid chambers increases in volume by the same amount that the other decreases in volume, thereby maintaining the internal volume of the valve constant.

대표청구항 ▼

A high pressure fluid valve, comprising: a fluid inlet; a fluid outlet; a fluid path connecting the inlet and outlet; said inlet and outlet including fluid passageway extensions extending therefrom; valve means in the fluid path comprising a movable member and fixed member; one of the valve members

A high pressure fluid valve, comprising: a fluid inlet; a fluid outlet; a fluid path connecting the inlet and outlet; said inlet and outlet including fluid passageway extensions extending therefrom; valve means in the fluid path comprising a movable member and fixed member; one of the valve members including one of said fluid passageway extension terminating in an annular valve seat and the other member including a closure element adapted to engage the valve seat to stop fluid flow through the passageway; means for moving the movable member toward and away from the fixed member to cause the closure element to be moved into and out of engagement with the valve seat; the movable member and the fixed member, when spaced apart, defining portions of a first fluid chamber in the fluid path; the movable member including a portion remote from the valve means, said remote portion defining a portion of a second fluid chamber in the fluid path; said means for moving the movable valve member comprising a piston chamber, a plurality of piston sections, said piston sections including a plurality of cavities therein, said piston sections being connected together and mounted for movement in the piston chamber in the direction of movement of the movable valve member by actuator means, a body member being disposed within said cavities when said piston sections are connected together, said body member including said first and second fluid chambers for receiving said annular valve seat and said closure element in one of said fluid chambers and the other of said fluid passageway extensions being disposed in the other of said fluid chambers; and means including said actuator means for increasing the volume of the second fluid chamber during relative movement of the closure element toward the valve seat by an amount corresponding to the amount by which the first fluid chamber is decreased, whereby the internal volume of the valve remains substantially the same during activation of the valve.