초록 ▼

A fluid controller comprising a valve element and a valve stem rotatably attached at its lower end to the upper end of the valve element, the valve element being movable upward or downward by rotating the valve stem to move the valve stem upward or downward. The valve element is brought into contact

A fluid controller comprising a valve element and a valve stem rotatably attached at its lower end to the upper end of the valve element, the valve element being movable upward or downward by rotating the valve stem to move the valve stem upward or downward. The valve element is brought into contact with and seated in a valve seat to close a fluid channel by being moved downward. The element is brought out of contact with the valve seat to open the fluid channel by being moved upward. The controller has an elastic member for biasing the valve element upward to press the element against the valve stem with a predetermined force in the vicinity of the seated position where the valve element is in contact with the valve seat.

대표청구항 ▼

A fluid controller comprising: a valve element being formed at a lower end portion thereof with a downwardly tapered conical face to be seated; a valve stem being attached at a lower end portion thereof to the upper end portion of the valve element so that the valve element and the valve stem are ro

A fluid controller comprising: a valve element being formed at a lower end portion thereof with a downwardly tapered conical face to be seated; a valve stem being attached at a lower end portion thereof to the upper end portion of the valve element so that the valve element and the valve stem are rotatable axially thereof relative to each other, the valve stem being movable in one of an upward direction and a downward direction by rotation thereof, and thereby the valve element being movable axially in one of an upward direction and a downward direction, the tapered conical face contacting an annular valve seat to close a fluid channel by moving the valve element in a downward direction, the tapered conical face being away from the valve seat to open the fluid channel by moving the valve element in an upward direction; and elastic member means for urging the valve element upward to press the valve element against the valve stem with a predetermined force when the valve element is in a first range of movement, the first range of movement including a predetermined range of movement wherein the valve element is in ine of a seated position and positions in the vicinity of the seated position, and wherein the elastic member means does not urge the valve element when the valve element is moved through a second range of movement.