Patent ID: 7346434

Claim:
A flow control device for terminating fluid flow after a predetermined quantity of fluid has been delivered through the device, which comprises: a primary line for conveying fluid through the device from an inlet to an outlet; a flow meter attached to the primary line for measuring flow quantities through the device; an intermediate valve in the primary line for controlling flow therethrough; a control line attached to the primary line for permitting a quantity of fluid to selectively bypass the intermediate valve; a shutdown valve in the control line for controlling flow therethrough; an apparatus associated with the device for measuring a fluid pressure differential in the device, a controller responsive to the flow meter for closing the intermediate valve when the predetermined quantity of fluid has been delivered, and the controller including at least one timer, the controller responsive to the timer for closing the intermediate valve and the shutdown valve when the fluid pressure differential has remained greater than a predetermined value for a predetermined period of time.