초록 ▼

A valve adapted to control liquid pressure by sliding within a valve housing a bottomed tubular valve closure member having a porous peripheral wall. The pores are subjected to reverse flush by moving the valve closure member to a closed position and also by closing an open end of the valve closure

A valve adapted to control liquid pressure by sliding within a valve housing a bottomed tubular valve closure member having a porous peripheral wall. The pores are subjected to reverse flush by moving the valve closure member to a closed position and also by closing an open end of the valve closure member. The valve housing includes a passage for discharging the liquid from the valve at times of the reverse flush.

대표청구항 ▼

A control valve comprising: a valve housing defining an interior space; a partition defining an opening and dividing said interior space of said valve housing into an upstream space and a downstream space; a valve closure member slidably mounted in said opening and including a closed end reciprocabl

A control valve comprising: a valve housing defining an interior space; a partition defining an opening and dividing said interior space of said valve housing into an upstream space and a downstream space; a valve closure member slidably mounted in said opening and including a closed end reciprocable within said downstream space between an uppermost position and said partition, and a peripheral wall integral with said closed end defining a plurality of pores, and an open end opposite said closed end being reciprocable only within said upstream space between said partition and a lowermost position so as to control fluid flow through said valve according to the number of said pores positioned in said downstream space; an inlet defined in said housing in fluid communication with said upstream space; an outlet defined in said housing in fluid communication with said downstream space, said upstream and downstream spaces being in normal fluid communication by virtue of said opening, the liquid normally flowing in a direction from the inlet through said open end thereby passing through said pores from the interior of said closure member to the exterior thereof; and a discharge bore formed in the valve housing in fluid communication with said upstream space and being tightly surrounded by the open end of said closure member when in said lowermost position so as to close said partition opening with said closed end thereby preventing fluid communication between said upstream and downstream spaces and reversing fluid flow through said closure member by effecting fluid flow in a direction from said inlet through said pores from the exterior of said closure member to the interior thereof.