US3770209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspirating spray head
Assignee: Delavan Manufacturing Co
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Filing: 1972-04-19
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Granted: 1973-11-06
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Expires: 1992-04-19
Abstract
Abstract In an aspirating spray head, fluid is introduced by way of an air inlet passage through one end of a larger diameter receiving passage which is open at its other end and liquid is introduced to the receiving passage by way of a liquid inlet passage which laterally opens into the receiving passage between its end. The end of the receiving passage through which the air inlet passage opens is defined by an abrupt shoulder which lies in a plane perpendicular to the receiving and air inlet passages, and the edge of the openings through which the air and liquid inlet passages open into the receiving passages are spaced from each other. When air is introduced into the receiving passage from the air inlet passage, liquid is aspirated through the liquid inlet passage and mized with the air in the receiving passage where the mixture is discharged therefrom as a spray. The ratio of the diameter of the receiving passage to the diameter of the air inlet passage is preferably between approximately 1.6 and 2.5 and the ratio of the distance between the openings of the liquid and air inlet passages to the diameter of the air inlet passage is preferably less than approximately 2.0.
Inventors
- 👤 R Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:37
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/04; B05B7/0416; B05B7/0483
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
223 words
In an aspirating head, a first receiving passage open at one end to discharge a stream from the head, a second inlet passage opening through the opposite end of said first receiving passage and adapted to deliver a flow of a fluid to said receiving passage. said receiving passage having a cross sectional dimension which is substantially constant over its length and in which the ratio of the width of the receiving passage to the width of said second inlet passage is in the range of approximately 1.6 to 2.5, said opposite end of said receiving passage defining a shoulder which is positioned in a plane which is perpendicular to said passages, and a third inlet passage opening laterally into said receiving passage between said one end and said shoulder and in spaced relationship to said shoulder, said third inlet passage being adapted to be connected to a source of material at substantially atmospheric pressure, said passages being dimensioned and spaced from each other such that a pressure less than atmospheric pressure is present adjacent the opening of said third inlet passage when fluid is delivered through said second inlet passage, whereby said material is aspirated from the source by the flow of said fluid into said receiving passage and the fluid and material are mixed in the receiving passage and discharged therefrom.
Claim 2
Dependent Claim
223 words
In an aspirating head, a first receiving passage open at one end to discharge a stream from the head, a second inlet passage opening through the opposite end of said first receiving passage and adapted to deliver a flow of a fluid to said receiving passage. said receiving passage having a cross sectional dimension which is substantially constant over its length and in which the ratio of the width of the receiving passage to the width of said second inlet passage is in the range of approximately 1.6 to 2.5, said opposite end of said receiving passage defining a shoulder which is positioned in a plane which is perpendicular to said passages, and a third inlet passage opening laterally into said receiving passage between said one end and said shoulder and in spaced relationship to said shoulder, said third inlet passage being adapted to be connected to a source of material at substantially atmospheric pressure, said passages being dimensioned and spaced from each other such that a pressure less than atmospheric pressure is present adjacent the opening of said third inlet passage when fluid is delivered through said second inlet passage, whereby said material is aspirated from the source by the flow of said fluid into said receiving passage and the fluid and material are mixed in the receiving passage and discharged therefrom.
Claim 3
Dependent Claim
59 words
In the aspirating head of claim 1 wherein the edge of the opening of said third inlet passage into said first receiving passage is spaced a predetermined distance from the opening of said second inlet passage into said receiving passage, and the ratio of said distance to the width of said second inlet passage is less than approximately 2.0.
Claim 4
Dependent Claim
17 words
In the aspirating head of claim 1 wherein the upper limit of said ratio is approximately 2.0.
Claim 5
Dependent Claim
19 words
In the aspirating head of claim 1 wherein said fluid is a gas and said material is a liquid.
Claim 6
Dependent Claim
185 words
In an aspirating spray head, a receiving passage having a given diameter and open at one end to discharge spray from the device, a gas inlet passage opening through the opposite end of said receiving passage and adapted to deliver a flow of gas to said receiving passage, the diameter of said gas inlet passage being smaller than said given diameter and the ratio of said given diameter to said last diameter being in the range of approximately 1.6 and 2.5, and a liquid inlet passage opening laterally into said receiving passage and adapted to be connected to a source of liquid at substantially atomspheric pressure, the opening of said liquid inlet passage being spaced a predetermined distance from the opening of said gas inlet passage such that the ratio of said predetermined distance to the diameter of said gas inlet passage does not exceed approximately 2.0, and wherein said passages are dimensioned and spaced from each other such that a pressure less than atmospheric pressure is present adjacent the opening of said liquid inlet passage when gas is delivered through said gas inlet passage.
Claim 7
Dependent Claim
185 words
In an aspirating spray head, a receiving passage having a given diameter and open at one end to discharge spray from the device, a gas inlet passage opening through the opposite end of said receiving passage and adapted to deliver a flow of gas to said receiving passage, the diameter of said gas inlet passage being smaller than said given diameter and the ratio of said given diameter to said last diameter being in the range of approximately 1.6 and 2.5, and a liquid inlet passage opening laterally into said receiving passage and adapted to be connected to a source of liquid at substantially atomspheric pressure, the opening of said liquid inlet passage being spaced a predetermined distance from the opening of said gas inlet passage such that the ratio of said predetermined distance to the diameter of said gas inlet passage does not exceed approximately 2.0, and wherein said passages are dimensioned and spaced from each other such that a pressure less than atmospheric pressure is present adjacent the opening of said liquid inlet passage when gas is delivered through said gas inlet passage.
Claim 8
Dependent Claim
18 words
In the spray device of claim 5 wherein the upper limit of said first mentioned ratio is 2.0.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |