| 摘要 |
A consistent-delivery flush and fill system for a water tank. A vertically movable post with a central passage carries a valve plug to open and close a valve seat for a discharge port from the tank. Buoyancy means on the post respond to the water level in the tank. A tank valve supplies water to the tank. When the tank is full the tank valve is closed. Engagement means on the post prevents the tank valve from opening until the tank is substantially emptied, at which time the valve plug closes the discharge port and enables the tank valve to open, having delivered a substantially constant volume of water from flush-to-flush.
|
