Flush valves

A flush valve for releasing liquid upon actuation thereof, said flush valve comprising a housing having an inlet and an outlet, a valve seat located in said housing, a first valve member having a closed position in sealing engagement with the valve seat and movable relative to the valve seat to an open position, said first valve member when in an open position allowing fluid to flow from said inlet to said outlet, means for moving said first valve member from said closed position to an open position and back to said closed position including a second valve member movable to direct fluid pressure into a chamber associated with said first valve member, an increase in the pressure in said chamber acting on said first valve member to effect movement thereof from said closed to said open position, means for effecting movement of said second valve member to said open position comprising a trip arm member which has a portion extending exteriorly of said valve housing and which is manually movable to an actuated position, and means for enabling said second valve member to close and thus effect closing of said first valve member even if said trip arm is held in an actuated position, said last-recited means including a mechanical connection between said second valve member and said trip arm, said mechanical connection including a first portion connected to one of said trip arm member and second valve member and a second portion of the other of said trip arm member and second valve member slideably movable relative to said first portion and being disengageable therefrom upon a predetermined amount of movement of said second valve member, and means for moving said second valve member to a closed position when said first and second portions become disengaged.

A flush valve for releasing liquid upon actuation thereof comprising:

• a. a valve housing having an inlet and an outlet, a valve seat surface circumscribing said inlet,
• b. a piston received in said housing and movable between an open and a closed position relative to said valve seat surface,
• c. said piston having one end sealable with said valve seat surface when said piston is in the closed position which blocks liquid from flowing from said inlet to said outlet and movable from said valve seat surface upon actuation of said flush valve which permits liquid to flow from said inlet to said outlet,
• d. a control chamber sealable from said inlet when said piston is in the closed position and having an expanding portion between said piston and said housing,
• e. means for providing restricted flow of liquid from said control chamber to said outlet,
• f. valve means for selectively connecting the pressurized liquid from said inlet to said control chamber creating a resultant force urging said piston to the open position upon actuation of said flush valve and for disconnecting the pressurized liquid from said inlet to said control chamber when said piston reaches an open position,
• g. said valve means for selectively connecting and disconnecting the pressurized liquid from said inlet to said control chamber including an actuating valve member connected to said piston and movable between an open position in which said control chamber is connected to said inlet and a closed position in which said control chamber is disconnected from said inlet, and
• h. means for limiting the volume of liquid released by said flush valve including an extension arm slideably mounted along one end of said actuating valve member.

A flush valve for releasing liquid upon actuation thereof comprising:

• a. a valve housing having an inlet and an outlet, a valve seat surface circumscribing said inlet,
• b. a piston received in said housing and movable between an open and a closed position,
• c. said piston having one end sealable with said valve seat surface when said piston is in the closed position which blocks liquid from flowing from said inlet to said outlet and unsealable from said valve seat surface upon actuation of said flush valve which permits liquid to flow from said inlet to said outlet,
• d. a control chamber sealable from said inlet when said piston is in the closed position and having an expanding portion between said piston and said housing,
• e. means for providing restricted flow of liquid from said control chamber to said outlet,
• f. valve means for communicating the pressurized liquid from said inlet to said control chamber creating a resultant force urging said piston to the open position upon actuation of said flush valve and for blocking the pressurized liquid from said inlet to said control chamber when said piston reaches an open position,
• g. said means for communicating and blocking the the pressurized liquid from said inlet to said control chamber including an actuating valve arm connected to said piston and movable between an open position to actuate said valve means to communicate said control chamber to said inlet and a closed position in which said valve means blocks communication of said control chamber from said inlet,
• h. a tripping mechanism mounted to said housing having a tripping member having one end positioned adjacent to said actuating valve arm, said tripping member movable to move said actuating valve arm to an open position, and
• i. adjusting means for positioning said one end of said tripping member at various positions along said actuating valve arm to adjust the volume of liquid released by said valve.

A flush valve for releasing a volume of liquid upon actuation thereof comprising:

• a. a valve housing having an inlet and an outlet, a valve seat surface circumscribing said inlet,
• b. a piston received in said valve housing and movable between an open and a closed position,
• c. said piston having one end sealable with said valve seat surface of said housing when said piston is in the closed position which blocks liquid from flowing from said inlet to said outlet and unsealable from said valve seat surface upon actuation of said flush valve which permits liquid to flow from said inlet to said outlet,
• d. a control chamber sealable from said inlet when said piston is in the closed position and having an expanding portion between said piston and said valve housing,
• e. means for providing restricted flow of liquid from said control chamber to said outlet,
• f. valve means for selectively connecting the pressurized liquid from said inlet to said control chamber creating a resultant force urging said piston to the open position upon actuation of said valve and for disconnecting the pressurized liquid from said inlet to said control chamber when said piston reaches the open position,
• g. said valve means for selectively connecting and disconnecting the pressurized liquid from said inlet to said control chamber including an actuating valve arm connected to said piston and movable between an open position in which said control chamber is connected to said inlet and a closed position in which said control chamber is disconnected from said inlet,
• h. said actuating valve arm including an extension member slideably mounted along one end thereof and having an opening therein which is positioned along an axis when said piston is in the closed inactuated position,
• i. a tripping mechanism mounted to said housing having a tripping member having one end positioned adjacent to said actuating valve arm, said tripping member movable to move said actuating arm to the open position, said one end of said tripping member received in said opening in said extension member and positioned along said axis of said opening of said extension member when said extension member is in the closed position, and
• j. means for adjusting the predetermined volume of liquid released by said flush valve including means for positioning said one end of said tripping member at various positions along said actuating valve arm to adjust the predetermined volume of liquid released by said valve.

A flush valve for releasing a predetermined volume of liquid upon actuation thereof comprising:

• a. a valve housing having an inlet with liquid under pressure therein, an outlet, and a valve seat surface between said inlet and said outlet,
• b. a control valve sealable with said valve seat surface and movable between an open position in which liquid flows from said inlet to said outlet and a closed position in which the flow of liquid from said inlet to said outlet is blocked,
• c. a control chamber between said control valve and said housing,
• d. means for adjusting the predetermined volume of liquid released by said flush valve upon actuation thereof,
• e. means for limiting the volume of liquid released by said flush valve to the predetermined amount,
• f. an actuating valve member connected to said control valve and movable between an open position in which said control chamber is connected to one of said inlet and said outlet and a closed position in which said control chamber is disconnected from said one of said inlet and said outlet,
• g. said limiting means including an extension member slideably mounted along one end of said actuating valve member,
• h. said limiting means having means for resiliently urging said extension member toward the one end of said actuating valve member, and
• i. a tripping mechanism mounted to said housing having a tripping member having one end positioned adjacent to said extension member when said control valve is in the closed position, said one end of said tripping member movable upon actuation thereof to move said actuating member to the open position,
• j. said extension member having an opening along an axis when said control valve is in the closed unactuated position, said one end of said tripping member received in said opening in said extension member, said tripping member being positioned along said axis of said opening of said extension member, and
• k. said adjusting means including means for positioning said tripping member at various positions along said extension member to adjust the predetermined volume of liquid released by said valve.