Patent US3698644A successfully refreshed from Google Patents.
US3698644A
Expired / Lapsed
US
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Combination aspirator and spray nozzle
Assignee: Ecolab Inc
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Filing: 1971-02-17
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Granted: 1972-10-17
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Expires: 1991-02-17
Abstract
Abstract A portable hand-held spray gun having a hollow handle defining a water passageway therein, a venturi positioned in the water passageway and a product conduit line in communication with the throat of the venturi for injecting product (e.g. a liquid detergent) into the water flow. Two trigger-operated valves separately control the flow of water through the water passageway and the injection of the product into the water flow. A nozzle for forming a variable spray pattern is provided downstream of the venturi, the dimensions of the nozzle orifice and venturi throat being such that the injection rate of the product is essentially constant over a wide range of spray patterns.
Inventors
- 👤 David L Nystuen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:51
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/12; B05B12/00; B05B12/002; B05B7/04; B05B7/0408; B05B7/24; B05B7/26; B05B7/28; B05B7/30; D; D06; D06F; D06F43/00; D06F43/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
213 words
Aspirating and spraying apparatus, comprising: a. a first passageway means connectable to a pressurized source of carrier fluid; b. first valve means associated with said first passageway for controlling the flow of carrier fluid therethrough; c. venturi means having a throat thereof in communication with said first passageway, a reduced pressure occurring in said throat upon passage of the carrier fluid through said venturi; d. second passageway means in communication with said throat of said venturi means and connectable to a source of product fluid; e. second valve means associated with said second passageway means for controlling the flow of product fluid therethrough; said product fluid being injected into said carrier fluid by the reduced pressure in said venturi throat when said first and second valve means are in their open positions; and f. nozzle means attached to said first passageway means and having an orifice suitable for providing a range of spray patterns to the fluid exhausted therethrough, the dimensions of said venturi throat and said nozzle orifice being sized to provide a generally constant reduced pressure in said venturi throat when said first and second valve means are in their open positions thereby injecting fluid product into said carrier at an essentially constant rate over said entire range of spray patterns.
Claim 2
Dependent Claim
213 words
Aspirating and spraying apparatus, comprising: a. a first passageway means connectable to a pressurized source of carrier fluid; b. first valve means associated with said first passageway for controlling the flow of carrier fluid therethrough; c. venturi means having a throat thereof in communication with said first passageway, a reduced pressure occurring in said throat upon passage of the carrier fluid through said venturi; d. second passageway means in communication with said throat of said venturi means and connectable to a source of product fluid; e. second valve means associated with said second passageway means for controlling the flow of product fluid therethrough; said product fluid being injected into said carrier fluid by the reduced pressure in said venturi throat when said first and second valve means are in their open positions; and f. nozzle means attached to said first passageway means and having an orifice suitable for providing a range of spray patterns to the fluid exhausted therethrough, the dimensions of said venturi throat and said nozzle orifice being sized to provide a generally constant reduced pressure in said venturi throat when said first and second valve means are in their open positions thereby injecting fluid product into said carrier at an essentially constant rate over said entire range of spray patterns.
Claim 3
Dependent Claim
100 words
The aspirating and spraying apparatus of claim 1 in the form of a gun-like structure wherein: a. said first passageway means includes first and second portions thereof; b. said first portion of said first passageway is defined by the handle of said gun-like structure and the second portion thereof is defined by the barrel of said gun-like structure; and c. said second valve means includes trigger-like means for actuating said second valve and means for biasing said second valve in said closed position to prevent injection of the product fluid into said carrier flow until actuation of said second valve.
Claim 4
Dependent Claim
52 words
The aspirating and spraying apparatus of claim 2 wherein: a. said venturi-means is positioned within said handle portion of said first passageway; and b. said first valve means is positioned within said second portion of said first passageway downstream from said venturi throat and includEs trigger means for actuating said first valve.
Claim 5
Dependent Claim
81 words
The aspirating and spraying apparatus of claim 2 wherein: a. said second portion of said first passageway includes a valve seat; b. said first valve means includes a threadedly adjustable valve member engageable with said valve seat for controlling fluid flow through said second portion of said first passageway; c. said venturi means is positioned within said second portion of said first passageway downstream of said valve seat; and d. said handle of said gun-like structure further defines said second passageway.
Claim 6
Dependent Claim
143 words
Combination aspirating and spraying apparatus, comprising: a. a first passageway connectable to a pressurized source of carrier fluid; b. means defining a venturi having a throat thereof in fluid communication with said first passageway; c. a second passageway in communication with said throat of said venturi means and connectable to a source of product fluid, said product being injected into said carrier fluid at said venturi throat by the reduced pressure therein; and d. means defining a nozzle assembly attached to said first passageway downstream from said venturi means and suitable for providing a range of spray patterns to the fluid exhausted through an outlet aperture therein, the dimensions of said venturi throat and said nozzle outlet aperture being sufficient to provide an essentially constant reduced pressure in said venturi throat over the wide range of spray patterns provided by said nozzle assembly.
Claim 7
Dependent Claim
143 words
Combination aspirating and spraying apparatus, comprising: a. a first passageway connectable to a pressurized source of carrier fluid; b. means defining a venturi having a throat thereof in fluid communication with said first passageway; c. a second passageway in communication with said throat of said venturi means and connectable to a source of product fluid, said product being injected into said carrier fluid at said venturi throat by the reduced pressure therein; and d. means defining a nozzle assembly attached to said first passageway downstream from said venturi means and suitable for providing a range of spray patterns to the fluid exhausted through an outlet aperture therein, the dimensions of said venturi throat and said nozzle outlet aperture being sufficient to provide an essentially constant reduced pressure in said venturi throat over the wide range of spray patterns provided by said nozzle assembly.
Claim 8
Dependent Claim
34 words
The combination aspirating and spraying apparatus of claim 5 wherein said nozzle assembly includes a variable spray forming orifice having an essentially constant cross-sectional area over the entire range of spray patterns provided thereby.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |