Hand pump foamer
First Claim
1. A hand-operated, portable sprayer comprising:
- a tank;
a flow controller;
a pump assembly for pressurizing said tank;
an air delivery system connected to said tank and said flow controller, whereby pressurized air flows from the headspace in said tank to said flow controller; and
a liquid delivery system connected to said tank and said flow controller, whereby liquid flows from said tank to said flow controller, wherein said liquid delivery system is segregated from said air delivery system such that the liquid is withdrawn from said tank segregated from the air.
1 Assignment
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Accused Products
Abstract
A hand-operated, portable sprayer to selectively produce a foamy effluent spray, rather than only the purely liquid spray provided by conventional sprayers. The sprayer includes segregated air and liquid delivery systems that separately supply air and liquid from the pressurized tank reservoir to a mixing chamber. Foaming may be facilitated by incorporating a mixing medium in or downstream from the mixing chamber. A flow controller is provided to control the flow of output from the sprayer. The flow controller and the mixing chamber may be incorporated into a single component. A valve may be included in the air delivery line to allow the users to attenuate the air flow rate to the mixing chamber, thereby permitting the user to select the consistency of the effluent foam according to the particular application.
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Citations
28 Claims
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1. A hand-operated, portable sprayer comprising:
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a tank;
a flow controller;
a pump assembly for pressurizing said tank;
an air delivery system connected to said tank and said flow controller, whereby pressurized air flows from the headspace in said tank to said flow controller; and
a liquid delivery system connected to said tank and said flow controller, whereby liquid flows from said tank to said flow controller, wherein said liquid delivery system is segregated from said air delivery system such that the liquid is withdrawn from said tank segregated from the air. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A hand-operated, portable sprayer comprising:
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a sealed, pressure-resistant tank having a pump assembly inserted into sand tank, said pump assembly supplying air to said tank to pressurize a headspace defined within said tank;
a liquid withdrawal tube extending into and near a bottom of said tank;
a liquid transport hose connected in fluid communication with said liquid withdrawal tube;
an air transport hose connected in fluid communication with said headspace;
a flow controller attached in communication with said air transport hose and said liquid transport hose, said flow controller having a valve for selectively controlling flow of effluent from the sprayer. - View Dependent Claims (22, 23, 24, 25)
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26. A portable sprayer comprising:
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a tank;
a mixing chamber separate from said tank;
an air delivery system in fluid communication with said tank and said mixing chamber;
a liquid delivery system in fluid communication with said tank and said mixing chamber, said liquid delivery system being segregated from said air delivery system such that air and liquid are separately delivered from said tank to said mixing chamber, wherein said mixing chamber combines air from said air delivery system and liquid from said liquid delivery system to generate a foam; and
a flow controller in fluid communication with said mixing chamber for controlling a flow of foam from the sprayer. - View Dependent Claims (27, 28)
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Specification