Apparatus for injecting a liquid into the vascular paths of a tr

Details Apparatus for injecting a liquid into the vascular paths of a tr Apparatus for injecting a liquid into the vascular paths of a tr

1984-11-15

1986-06-24

Bagwill, Robert E.

Plant husbandry

Injection, method or apparatus

A01G 2900

Patent

active

045960887

ABSTRACT:
A first piston 20 is cocked by applying pressure to a chamber 17 in the front end of a cylinder 10, which attendantly compresses a first spring 70. Upon subsequently releasing a trigger latch 82, the spring 70 drives an injection needle 31 carried by the rod 22 of the piston into a tree trunk. Pressure is next applied to a space 45 behind a second piston 40 slideable within the first piston skirt, which zero volumes a chamber 21 between the two pistons and compresses a second spring 71. The space 45 is then vented, whereupon the spring 71 separates the two piston heads to vacuum fill the reestablished chamber 21 with a vascular treatment liquid for trees. Finally, the space 45 is re-pressurized to force the liquid into the tree through the inserted needle.

REFERENCES:
patent: 3286402 (1966-11-01), Newton
patent: 3461588 (1969-08-01), Johnson
patent: 3559340 (1971-02-01), Good
patent: 3832803 (1974-09-01), Blake et al.
patent: 4011685 (1977-03-01), Boyd et al.

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