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US 5,287,992 AGranted
Method and apparatus for applying herbicide and the like to trees
AssigneeForestry Injection Company FIC AB
InventorHans A. K. Merving
Life of this patent
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Abstract
A method for treating a tree comprises the steps of punching at least one hole in a trunk of a tree and injecting an individual chemical pellet directly into the at least one hole. The chemical pellet dissolves in and mixes with sap of the tree to treat the tree. A dispenser for injecting the pellets and a punch hammer for punching holes in the tree, both of which are used in the tree treating method, are also disclosed.
Claims10
A dispenser for ejecting pellets comprising:
- a body portion having first and second ends and a cylindrical outer wall, extending between the first and second ends, forming a boundary for a cavity provided in said body portion for storing a plurality of pellets to be ejected;
- an elongated ejection rod for ejecting an individual pellet from the dispenser;
- a dispensing spout mounted on the first end of said body portion;
- an end wall at the first end of said body portion interposed between said dispensing spout and said body portion, said end wall including a first aperture allowing stored pellets to exit from said cavity, a second aperture allowing said elongated ejection rod to eject the individual pellet, and guide means for guiding pellets from said cavity to said first aperture and from said first aperture towards said second aperture and into alignment with said second aperture;
- a center tube aligned with said second aperture, said elongated ejection rod reciprocating within said center tube to protrude through said second aperture, move into contact with a pellet aligned with said second aperture, and force said pellet through said dispensing spout and out of said dispenser;
- and
- biasing means, provided in said center tube, for providing a force which acts on said elongated ejection rod, said elongated ejection rod being moved against said force as the individual pellet is ejected through said dispensing spout.
4 more elements
Dependencies are inferred from the claim text.