Patent ID: 6182904
Filing Date: 2001-02-06
Classification: A01M,B05B

Abstract:
A dispenser apparatus for periodic, controlled dispensing of a chemical in a liquid form which comprises:(a) a disposable sealed container having an orifice and containing a pressurized gas and the chemical in the liquid form;(b) adaptor means configured to be sealingly connected to the orifice;(c) a fuel injector nozzle sealingly connected to the adaptor means of the container capable of periodically dispensing the chemical in the liquid form by the pressurized gas from the container, wherein the fuel injector nozzle comprises:(i) a body with a passage therethrough;(ii) a valve needle moveable in the passage of the body to open and close the passage;(iii) a solenoid coil with electrical leads to the coil mounted on the body, so that the coil provides a continuous circuit surrounding the valve needle which is moved upon application of a current through the coil; and(iv) a bias means mounted in the body which holds the valve needle in a closed position when the current is not applied through the coil; and(d) a control means which supplies current to the coil to move the valve needle against the bias means to open the passage in the body of the fuel injector nozzle and allows the chemical in the liquid form to be dispensed periodically from the container through the passage in the body of the fuel injector nozzle, wherein the sealed container is used without refilling and is replaced when empty with a replacement sealed container.