초록 ▼

Chemical injector comprises injector structure for injecting a solution from a reservoir into a flowing stream, usually water. The reservoir is at atmospheric pressure, and a chemical solution is withdrawn therefrom by Venturi action, with flow rate being controlled by passage size. Alternatively, a

Chemical injector comprises injector structure for injecting a solution from a reservoir into a flowing stream, usually water. The reservoir is at atmospheric pressure, and a chemical solution is withdrawn therefrom by Venturi action, with flow rate being controlled by passage size. Alternatively, an injector pump can positively pump the reservoir solution into the flow stream when the flow rate is too low for Venturi action. A flow control valve is also connected to a bottom portion of the piston of the pump to control the amount of chemical solution flowing from the reservoir to the flowing stream.

대표청구항 ▼

A chemical injector comprising: a reservoir for containing a chemical-bearing liquid; a water flow channel having an inlet and an outlet, with its inlet being for the connection to a supply of water under pressure and its outlet being for connection to equipment for the discharge of a liquid; a Vent

A chemical injector comprising: a reservoir for containing a chemical-bearing liquid; a water flow channel having an inlet and an outlet, with its inlet being for the connection to a supply of water under pressure and its outlet being for connection to equipment for the discharge of a liquid; a Venturi tube in said water flow channel for causing a zone of reduced pressure when water flows through said water flow channel from the inlet to the outlet thereof; an aspirating channel provided between said reservoir and said zone of reduced pressure for aspirating chemical-bearing liquid from said reservoir into said water flow channel, said aspirating channel having first and second check valves therein, both of said check valves permitting flow in a direction from said reservoir to said zone of reduced pressure and preventing flow in the opposite direction; a cylinder bore between said check valves, a stem in said cylinder bore, a skirt on said stem, said skirt extending across said aspirating channel and being positionable within said aspirating channel to control flow through said aspirating channel, depending on position of said stem, said stem also having a piston thereon slidably received in said cylinder bore so that motion of said stem pumps liquid from said reservoir into said zone of reduced pressure so that said stem controls aspirated flow and movement of said stem controls pump flow from said reservoir into said water flow channel.