Single valve aspiration type sprayer
AssigneeHayes Products, LLC
InventorsRonald F. Englhard, Donald J. Shanklin
Life of this patent
Estimating the term…
Abstract
An aspiration type chemical sprayer for dispensing small quantities of a liquid based chemical into a stream of carrier fluid is disclosed. The sprayer includes a sprayer head assembly sealingly mounted onto a container holding chemicals such as pesticides or fertilizers. A unitary valve in the sprayer head assembly controls carrier fluid flow from a pressurized source of water while simultaneously providing a controlled aspiration rate and full communication of the container interior to atmospheric pressure. The valve additionally includes simultaneously closure of the carrier fluid, aspiration and vent passageways so as to seal the chemical in the container when the sprayer is not being used.
Claims15
An aspiration-type chemical sprayer, comprising:
- a container having an interior for storing a chemical to be sprayed;
- a sprayer head assembly having an interior surface defining a bore and further having an outlet means and an inlet carrier fluid passageway means for directing a pressurized flow of carrier fluid into said outlet means;
- connection means for mounting said sprayer head to said container;
- said sprayer head assembly further defining an aspiration passageway for communication between said container interior and said outlet means and a vent port for communication of atmospheric pressure with said container interior;
- a valve movably positioned within said bore in the sprayer head assembly so as to simultaneously intersect said inlet passageway, aspiration passageway and said vent port;
- said valve having integrally formed thereto inlet carrier fluid duct channeling means, aspiration duct channeling means and vent duct channeling means, for controlling simultaneous communication through said inlet passageway means, aspiration and vent passageways when said valve is in an open position;
- and
- said valve further having inlet passageway closure means, aspiration passageway closure means and vent passageway closure means for providing simultaneous closing of said passageways when said valve is in a closed position, said closure means comprising a stopper member on said valve associated with each of the inlet, aspiration and vent passageways for sealing engagement with the bore surface when said valve is positioned in a closed position.
An aspiration-type chemical sprayer comprising:
- a container having an interior for storing a chemical to be sprayed;
- a sprayer head having an internal bore, an expansion chamber, a carrier fluid inlet chamber for directing a pressurized flow of carrier liquid into the expansion chamber, an aspiration passageway for directing chemicals from the container interior to the expansion chamber and an atmospheric vent port for communication of atmospheric pressure with the container interior;
- connection means for mounting the sprayer head to the container;
- a chemical flow tube in fluid communication with the chemical stored in the container;
- and
- a valve member rotatably positioned within the bore in the sprayer head and having formed integrally therein:
- a) a carrier fluid duct for connecting the carrier fluid inlet chamber to the expansion chamber;
- b) an aspiration duct for connecting the chemical flow tube to the aspiration passageway;
- c) an atmospheric duct for connecting the vent port to the interior of the container in one open position and to simultaneously disconnect;
- d) the carrier fluid inlet chamber from the expansion chamber;
- e) the chemical flow tube from the aspiration passageway;
- f) the vent port from the interior of the container in another closed position;
- and
- g) the valve member further including a stopper member individually associated with each of the ducts in the valve member for sealingly engaging the surface of the bore in the sprayer head for preventing the flow of carrier fluid and chemical into the expansion chamber and the flow of chemical through the vent port when the valve is in the closed position.
Dependencies are inferred from the claim text.