초록 ▼

A control chamber of a float valve is formed in part by a diaphragm which is integral with an elastomeric main valve member that opens and closes the supply port of the float valve. A small tube to supply water to the control chamber is mounted in the main valve member and extends upward through and

A control chamber of a float valve is formed in part by a diaphragm which is integral with an elastomeric main valve member that opens and closes the supply port of the float valve. A small tube to supply water to the control chamber is mounted in the main valve member and extends upward through and beyond the supply port. The upper end of the small tube tapers to an inlet opening that is sufficiently restricted to keep large solid particles out of the control chamber. The control chamber has a lower bleeder port which is controlled by a fixed upright pilot valve member on a float. A hood integral with the bottom wall of the control chamber extends downward to form a float chamber enclosing the float, the hood having ample vent ports for siphon prevention. Water is discharged from the bleeder port into an expansile chamber, the outlet of which is sufficiently restricted to cause the expansile chamber to depress the float thereby to increase the volume of water released on each float cycle.

대표청구항 ▼

In a float valve for replenishing a body of liquid from a pressurized liquid source in response to drop in the level of the liquid body, wherein a control chamber is in communication with the pressurized source and has a movable wall to exert pressure to close a main valve to cut off the source from

In a float valve for replenishing a body of liquid from a pressurized liquid source in response to drop in the level of the liquid body, wherein a control chamber is in communication with the pressurized source and has a movable wall to exert pressure to close a main valve to cut off the source from the liquid body and a pilot valve operated by a float controls the bleeder port in a fixed wall of the control chamber, and wherein a hood extending downward from said fixed wall of the control chamber forms a float chamber enclosing the float, the improvement comprising: said fixed wall of the control chamber and said hood being formed in one piece thereby necessitating assembly of the float through the bottom of the hood; and means insiDe the hood to limit downward movement of the float relative to the hood, said means to limit downward movement of the float comprising cooperative stop means on the float and the hood respectively, said stop means being yieldable to permit the float to be forced past the stop means in the assembly of the float valve.