Method for using a rat guard

摘要

A rat guard and method utilizing a flexible shield affixed to a plastic sheath positioned on a mooring line to prevent entry onto or exit from the ship by vermin. An electric grid is positioned on an insulated pad on the sheath which is electrically connected to the shield for receiving power from an acoustical generator also connected to the shield and spaced therefrom. The acoustical generator directs ultrasonic acoustic signals in a variable frequency range toward the shield to frighten rats or other vermin therefrom. Should the acoustical signals not deter the vermin, the electric grid will shock any vermin making contact therewith to cause harm and frighten. The shield provides another obstacle to prevent advancement and is affixed to the sheath on the mooring line. The shield is flexible and remains in place during high winds and other adverse weather conditions.

主权项

1. A method of preventing vermin from boarding or disembarking a ship having a mooring line attached to a dock, the method comprising the steps of:
a) providing a rat guard having a shield connected to electrical circuitry and defining a central opening with a radial slot sized to receive the mooring line therein, the central opening being in communication with the radial slot, an electric grid connected to the electrical circuitry and defining an outer surface completely exposed, an acoustical generator connected to the electrical circuitry, and an electrical connector affixed to the shield at a location spaced away from the central opening and the radial slot; b) attaching the shield to the mooring line; c) encircling the mooring line with the exposed electric grid; d) activating the electrical circuitry; e) allowing a rat to contact the exposed electric grid; and f) shocking the rat with the exposed electric grid to deter progress along the mooring line.