초록 ▼

Fluid inductor and metering device for handling and mixing concentrated chemicals such as herbicides and pesticides. In one mode of operation, the concentrated chemicals are first drawn by a transfer pump from their storage container or containers into a graduated chamber and thereafter added into a

Fluid inductor and metering device for handling and mixing concentrated chemicals such as herbicides and pesticides. In one mode of operation, the concentrated chemicals are first drawn by a transfer pump from their storage container or containers into a graduated chamber and thereafter added into a primary water flow in a metered manner. In addition to being operable in a batching manner, the apparatus of the present invention can also be used to continuously inject the concentrated chemicals into the primary water flow directly from their storage containers as well as to back flush water through the storage containers to clean them. In the preferred embodiment, all of these operations can be accomplished using only the force of one transfer pump and by the manipulation of a single valve member.

대표청구항 ▼

A method for selectively using a primary flow of fluid through a conduit to first fill a chamber with a liquid from a remote storage container and then to empty the liquid from said chamber into said primary flow, said chamber having upper and lower portions and said method including the steps of: (

A method for selectively using a primary flow of fluid through a conduit to first fill a chamber with a liquid from a remote storage container and then to empty the liquid from said chamber into said primary flow, said chamber having upper and lower portions and said method including the steps of: (a) establishing said primary flow of fluid through said conduit from a first location to a second location, (b) creating an area of reduced flow pressure in said primary flow at an intermediate location along said conduit between said first and second locations, said reduced flow pressure being less than ambient air pressure, (c) providing a first flow path between said area of reduced flow pressure and the upper portion of said chamber, (d) providing a second flow path from said remote storage container of liquid to the lower portion of said chamber, (e) providing a third flow path between said area of reduced flow pressure and the lower portion of said chamber, (f) providing a fourth flow path from air at ambient air pressure to the upper portion of said chamber, and (g) selectively (1) opening the first and second flow paths and closing the third and fourth flow paths to reduce the pressure in the chamber below ambient air pressure to draw liquid from said remote storage container through the second flow path into the chamber through the lower portion thereof and then (2) closing the first and second flow paths and opening the third and fourth flow paths to draw liquid from the chamber through the lower portion thereof into the primary flow through the third flow path as air at ambient air pressure fills the upper portion of the chamber through the fourth flow path.