A spraying device having a sprayer head and an interchangeable, disposable, recyclable and/or biodegradable, and attachable cartridge, capable of diluting and dispensing a chemical. The device has a rotatable barrel valve to select whether to fill the cartridge, spray the diluted chemical, or prevent...http://www.google.ca/patents/US5213264?utm_source=gb-gplus-sharePatent US5213264 - Spraying device with a replaceable cartridge
