Patent ID: 7401562
Filing Date: 2008-07-22
Classification: A01C,F16K,Y10T

Abstract:
1. A safety system for a mobile anhydrous hydrous ammonia fertilizer system having a nurse tank, a tractor, an ammonia applicator supported on the tractor, and a flexible hose between the nurse tank and the applicator, the safety system comprising: a battery power supply; a shutdown switch; a safety valve for terminating flow of anhydrous ammonia from the nurse tank; an electrical conductor between the shutdown switch, the battery power supply, and the safety valve; an electrical connector spaced along the electrical conductor and separable during a pull away of the tractor from the nurse tank; and the safety valve including an electromagnet powered by the battery power supply for holding the safety valve open, the safety valve automatically closing in response to one of activation of the shutdown switch or separation of the electrical connector.