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

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

A - Human Necessities

01

G

47/12

A01G 29/00 (2006.01) A01G 7/06 (2006.01)

Patent

CA 1245055

ABSTRACT OF THE DISCLOSURE 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.

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