Foam-generating pump sprayer
Patent 4603812 Issued on August 5, 1986. Estimated Expiration Date: 
May 21, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 21, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsApplicationNo. 06/612196 filed on 05/21/1984US Classes:239/329, Moving solid surface engages material to be sprayed222/190, WITH MATERIAL TREATMENT OR CONDITIONING MEANS239/397, Selective coupling means for head or nozzle239/428.5Liquid flow induces atmospheric air (e.g., faucet aerator)ExaminersPrimary: Kashnikow, AndresAttorney, Agent or FirmInternational ClassesA47K 5/00 (20060101)A47K 5/14 (20060101) B05B 7/00 (20060101) B05B 11/00 (20060101) AbstractA hand-held apparatus for spraying foam comprises (a) a manually-operated dispensing pump capable of receiving a foamable liquid from a suitable container and ejecting it into the atmosphere through an atomizing nozzle, thereby forming a spray from such liquid and projecting it outwardly from the nozzle in a predetermined spray pattern, and (b) foam-forming device including an air inlet and a screen retained in the path of the spray. The screen can be retained in a foam-forming position by suitable means such as a housing operatively associated with the dispensing pump. Substantially all the spray passes through the foam-forming device without contact except by the screen, thereby generating foam with little modification of the predetermined spray pattern.Other References
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