US 3,993,221 AGranted

Closed system chemical transfer apparatus

AssigneeWestern Farm Service Inc.

InventorsEdgar M. Boynton, William H. Roberts

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Abstract

A receiving chamber is provided for receiving and enclosing a container of chemical such as an insecticide. While the container is in the chamber, a punch member perforates through the top and bottom of the container to permit the insecticide therein to transfer out from the bottom of the chamber to a main tank of water for mixing therewith. The resulting mixture is then passed to suitable spray apparatus for spraying the insecticide in agricultural operations. A plunger member coaxially surrounds the punch member and extends through the top of the chamber and can be lowered to crush the container after its contents have been emptied into the main water tank. In addition, the punch member includes an internal passage for passing flushing water into the container prior to crushing of the same so that it is cleaned out. The entire system is closed so that there is no risk of operators becoming contaminated by the insecticide chemical.

Claims5

Dependent claims

A closed system chemical transfer apparatus including, in combination:

a. a receiving chamber having an access door for receiving and enclosing within said chamber a container of chemicals;
b. an outlet means communicating with the bottom of said chamber;
c. a hollow plunger member extending down through the top of said chamber and terminating within the upper end of said chamber in a crusher platen;
and,
d. a punch member coaxially disposed and movable within said plunger member, the lower end of said crusher platen having an opening through which said punch member can extend whereby a container of chemical may be enclosed in said chamber and said punch member lowered to pierce through the top and bottom of said container to permit chemical in said container to transfer from said chamber through said outlet means and whereby after said container is empty, said plunger can be lowered to cause said platen to crush said container into a compact configuration for subsequent removal from said chamber by raising said punch member and plunger member and opening said access door.

2 more elements

Dependencies are inferred from the claim text.