Patent US3698645A successfully refreshed from Google Patents.
US3698645A
Expired / Lapsed
US
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Spray head
Assignee: Harris Paint Co
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Filing: 1971-03-02
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Granted: 1972-10-17
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Expires: 1991-03-02
Abstract
Abstract A sprayhead for a pressurized aerosol dispenser includes an elongated expansion and mixing chamber upstream of the sprayforming nozzle orifice. Controlled expansion of the dispensed product and propellant mixture within the chamber enhances vaporization of the propellant, promotes uniform mixing of the vaporized propellant with the product prior to passage through the spray nozzle, and produces increased flow rates for a given nozzle orifice diameter.
Inventors
- 👤 Charles A Coffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:16
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/28; B65D83/30; B65D83/303
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
In an atomizing sprayhead of the type having a cylindrical body with an axial passageway open at one end for attachment to the valve of a pressurized aerosol spray container, a discharge channel with an axis transversely intersecting the axis of the axial passageway, an expansion chamber formed in the discharge channel, and a coaxial restricted spray forming orifice at the downstream end of the expansion chamber, the improvement wherein: the expansion chamber has an inlet at its upstream end that is larger in cross-sectional area than the spray forming orifice and a cross-sectional flow area larger than that of the inlet, and the length of said expansion chamber is at least five times its diameter.
Claim 2
Dependent Claim
116 words
In an atomizing sprayhead of the type having a cylindrical body with an axial passageway open at one end for attachment to the valve of a pressurized aerosol spray container, a discharge channel with an axis transversely intersecting the axis of the axial passageway, an expansion chamber formed in the discharge channel, and a coaxial restricted spray forming orifice at the downstream end of the expansion chamber, the improvement wherein: the expansion chamber has an inlet at its upstream end that is larger in cross-sectional area than the spray forming orifice and a cross-sectional flow area larger than that of the inlet, and the length of said expansion chamber is at least five times its diameter.
Claim 3
Dependent Claim
18 words
The sprayhead of claim 1 wherein the length of said expansion chamber is at least approximately five-eighths inch.
Claim 4
Dependent Claim
18 words
The sprayhead of claim 2 wherein the inside diameter of said expansion chamber is at least 0.1 inch.
Claim 5
Dependent Claim
37 words
The sprayhead of claim 3 wherein the wall of said axIal passageway adjacent the open end has a rectangular inlet slot with a longitudinal dimension of approximately one-eighth inch and a lateral dimension of approximately one-sixteenth inch.
Claim 6
Dependent Claim
17 words
The sprayhead of claim 4 wherein the spray forming orifice has a diameter of about 0.032 inch.
Claim 7
Dependent Claim
25 words
The sprayhead of claim 1 wherein the inlet to the expansion chamber is at least as large as the cross-sectional area of the axial passageway.
Claim 8
Dependent Claim
20 words
The sprayhead of claim 6 wherein the upstream end of the expansion chamber intersects the wall of the axial passageway.
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 |