Title: Foam generating apparatus

Abstract: A foam generating nozzle is made either as an attachment to an existing liquid spray nozzle unit or as a pre-manufactured assembly and includes a foam-generating section having a pressure-reducing passageway including a preferably sharply outwardly tapering portion leading to a venturi-forming throat portion, and adapted to receive the liquid stream issuing from an inlet orifice. Air inlet ports are provided communicating with the pressure-reducing passageway, through which ports air is drawn by the reduced pressure caused by the pressure-reducing passageway. Optimum foaming action is achieved by adjusting the point of the pressure-reducing passageway struck by the stream which is most advantageously achieved by adjusting the angle of the stream issuing from the orifice so the widest portion thereof strikes the end section of the tapering portion of the passageway.

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Inventors: Schneider, Barry L. (Crystal Lake, IL, US)

Application Number: 523740
Filing Date: 1974-11-14
Publication_date: 1976-03-30
Assignee: Chemtrust Industries Corporation (Franklin Park, IL)
Primary Class(es): 239/401 239/311, 239/402.5, 239/403, 239/428.5, 239/434.5, 239/467, 239/485, 261/DIG26
Other Classes:
US Patent Ref:

1563123	Nov, 1925	Wade	239/434.
1605177	Nov, 1926	Diener	239/434.
1748248	Feb, 1930	Shepherd	239/467.
2231782	Feb, 1941	Thompson	239/313.
2624622	Jan, 1953	Holte	239/375.
2760821	Aug, 1956	Kenney	239/335.
2764452	Sep, 1956	Anderson et al.	239/310.
3446285	May, 1969	Hout	169/15.
3547200	Dec, 1970	Hout	169/15.
3625436	Dec, 1971	Wirths	239/419.
3739989	Jun, 1973	Vasper	239/399.
3797749	Mar, 1974	Tada	239/526.
3814329	Jun, 1974	Clark	239/526.

Other Refs:
Primary Examiner: Ward, Jr., Robert S.
Assistant Examiner:
Attorney: Wallenstein, Spangenberg, Hattis & Strampel