Fishing – trapping – and vermin destroying – Vermin destroying
Reexamination Certificate
1999-07-09
2001-06-19
Rowan, Kurt (Department: 3643)
Fishing, trapping, and vermin destroying
Vermin destroying
Reexamination Certificate
active
06247265
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a method and apparatus for exterminating pests and more particularly burrowing animals.
BACKGROUND
A common problem in agriculture is the loss of crops due to such pests as gophers and other burrowing animals. There is a wide variety of known techniques for killing gophers and the like which generally include some form of poison which is dispensed wherever the pests are located. Many known techniques currently in practice however are generally ineffective at killing the pests in sufficient numbers for effectively reducing crop loss, while other known techniques introduce harmful toxins into the environment. The present invention is concerned with an improved method of killing burrowing animals.
SUMMARY
According to one aspect of the present invention there is provided a pest exterminating method for exterminating burrowing animals, said method comprising;
providing a source of anhydrous ammonia; and
dispensing a portion of the anhydrous ammonia into a burrow of a burrowing animal.
The use of anhydrous ammonia does not harm the crops in a field where gophers and other burrowing animals might be pests, while being very effective in killing the gophers almost immediately. In addition, the use of anhydrous ammonia for killing the gophers does not introduce a harmful poison into the environment which can be passed on to humans and other animals. The use of anhydrous ammonia in agriculture is known as a fertilizer and thus the use of anhydrous ammonia in fields having planted crops for killing burrowing animals does not introduce any new chemicals into the field that are harmful to the crop.
The anhydrous ammonia is preferably dispensed in a liquid state. When dispensing the anhydrous ammonia a supply line may be provided such that the supply line is inserted down into the burrow before the anhydrous ammonia is dispensed.
According to a further aspect of the present invention there is provided a pest exterminating apparatus for exterminating burrowing animals, said apparatus comprising;
a portable storage tank arranged to store anhydrous ammonia therein;
a supply line arranged to connect to the storage tank;
a dispensing valve on the supply line adjacent a dispensing end of the supply line for controlling an amount of the anhydrous ammonia being dispensed through the supply line into a burrow of an animal.
The supply line may be arranged to communicate with anhydrous ammonia in the tank which is in a liquid state for dispensing the anhydrous ammonia through dispensing end of the supply line in a liquid state.
The tank may include a gas valve for dispensing the anhydrous ammonia from the tank in a gaseous state and a liquid valve for dispensing the anhydrous ammonia from the tank in a liquid state and wherein the supply line is arranged to connect to the gas valve in a gas dispensing position and to the liquid valve in a liquid dispensing position.
An ejector wand is preferably mounted on the dispensing end of the supply line for dispensing the anhydrous ammonia therethrough at a distance spaced from a person holding the dispensing end of the supply line.
A flexible tube extension may be mounted at an end of the wand opposite the supply line for insertion into the burrow.
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Metcalf & Flint, Destructive and Useful Insects, 3rd Ed. p. 303, 1951.
Maze Gary Keith
Maze Howard Keith
Maze Norman Daryl
Battison Adrian D.
Rowan Kurt
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