Foam generating apparatus
Patent 3946947 Issued on March 30, 1976. Estimated Expiration Date: 
March 30, 1993. 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.
March 30, 1993. 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 ReferencesInventorAssigneeApplicationNo. 523740 filed on 11/14/1974US Classes:239/401, Axially adjustable valve with fluid conducting stem239/311, Gas addition upstream of spray nozzle outlet239/402.5, Adjustable or selective whirl inducing means239/403, Whirling of fluid prior to or at point of addition of second fluid239/428.5, Liquid flow induces atmospheric air (e.g., faucet aerator)239/434.5, One fluid discharges into other in concentric conical portion of outer conduit239/467, And serially arranged deflector239/485And motion longitudinally of the axis of rotationExaminersPrimary: Ward, Robert S. Jr.Attorney, Agent or FirmAbstractA 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.Field of SearchIncluding mixing or combining with air, gas or steamWith combining of diverse fluids at or upstream of distributor INCLUDING SUPPLY HOLDER FOR MATERIAL To be mixed, dissolved or entrained in a flowing liquid stream prior to discharge Gas addition upstream of spray nozzle outlet Follower-type holder and stream egress means in juxtaposition Moving solid surface engages material to be sprayed Aspirating discharge nozzle Including whirler device to induce fluid rotation Three or more spray fluids (e.g., induction of ambient air) One a fluent solid Axially adjustable valve with fluid conducting stem Adjustable or selective whirl inducing means Including handle or handgrip for supply container and attached outlet Whirling of fluid prior to or at point of addition of second fluid Liquid flow induces atmospheric air (e.g., faucet aerator) | |
