Method of killing field mice and the like and apparatus for practicing the method
AssigneesNihon Sanso Kabushiki Kaisha, Shoji Kabushiki Kaisha
InventorHaruyoshi Narita
Life of this patent
Estimating the term…
Abstract
Liquid nitrogen is poured in an amount sufficient to suffocate the field mouse to death into one of the openings of a burrow formed in the ground, and the poured liquid nitrogen is then evaporated to thereby fill the burrow with the evaporated nitrogen and cause the evaporated nitrogen to issue from the other openings by expansion thereof, whereby the field mouse in the burrow is suffocated to death. The method gives no adverse effect on living creatures except the field mice to which the method is applied and enables efficiently getting rid of mice.
Claims3
A method of killing a field mouse comprising the steps of:
- (a) introducing liquid nitrogen in an amount sufficient to suffocate the field mouse to death into one of the openings of a burrow formed in the ground;
- and
- (b) evaporating the introduced liquid nitrogen to thereby fill the burrow with the evaporated nitrogen and cause the evaporated nitrogen to issue from the other openings by expansion of the evaporated nitrogen, whereby the field mouse in the burrow is suffocated to death.
An apparatus for killing a field mouse comprising:
- (a) a funnel member having two ends with one end having a smaller diameter than the other end and which is adapted to be fitted into the opening of a field mouse burrow, said funnel being used to introduce liquid nitrogen into said burrow,
- (b) means for sealing the other end of the funnel member from the atmosphere, said sealing means comprising:
- (i) an enclosure member having two open ends for enclosing the funnel member;
- and
- (ii) a closure member for sealing one open end of the enclosure member, wherein the funnel member is connected to the enclosure member so that the funnel member is centrally positioned within the enclosure member with the smaller diameter end of the funnel member disposed at a position remote from the one open end of the enclosure member.
Dependencies are inferred from the claim text.