US4362275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprayers
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1980-10-29
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Granted: 1982-12-07
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Expires: 2000-10-29
Abstract
Abstract A device to use as an agricultural sprayer, comprising a rotatable conductive sprayhead in the form of a disc or cup, means for supplying spray liquid from a reservoir to an inner surface of the sprayhead, an electric motor for rotating the sprayhead about its axis at a rate of 1000 to 8000 rpm, a circular induction electrode disposed adjacent the sprayhead rim, a high voltage generator for charging the electrode to a pontential in the range 1 to 3 Kilovolts, and means for earthing the sprayhead.
Inventors
- 👤 Ronald A. Coffee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:02
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/043; A; A01; A01M; A01M7/00; A01M7/0025; A01M7/0028; B05B5/04; B05B5/16; B05B5/1691
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
An agricultural sprayer, comprising a rotatable conductive sprayhead in the form of a disc or cup, means for suppyling spray liquid from a reservoir to an inner surface of the sprayhead, an electric motor for rotating the sprayhead about its axis at a rate of 1000 to 8000 revolutions per minute, a circular induction electrode disposed adjacent the sprayhead rim, a high-voltage generator for charging the electrode to a potential in the range 1-3 kilovolts, and means for earthing the sprayhead.
Claim 2
Dependent Claim
81 words
An agricultural sprayer, comprising a rotatable conductive sprayhead in the form of a disc or cup, means for suppyling spray liquid from a reservoir to an inner surface of the sprayhead, an electric motor for rotating the sprayhead about its axis at a rate of 1000 to 8000 revolutions per minute, a circular induction electrode disposed adjacent the sprayhead rim, a high-voltage generator for charging the electrode to a potential in the range 1-3 kilovolts, and means for earthing the sprayhead.
Claim 3
Dependent Claim
20 words
A sprayer as recited in claim 1 wherein said means for earthing the sprayer comprises a loose, trailing metal wire.
Claim 4
Dependent Claim
50 words
A sprayer as recited in claim 2 wherein said electric motor includes a shaft connected to said rotatable conductive sprayhead, and wherein said means for earthing the sprayhead further comprises a stationarily--with respect to the rotating sprayhead--mounted graphic brush engaging said shaft and operatively connected to said trailing metal wire.
Claim 5
Dependent Claim
30 words
A sprayer as recited in claim 1 further comprising a single switch means for electrically interconnecting said motor and said generator, at the same time, to a source of e.m.f.
Claim 6
Dependent Claim
32 words
A sprayer as recited in claim 4 wherein said source of e.m.f. comprises an array of dry cell batteries mounted to and for movement with, said motor and said circular induction electrode.
Claim 7
Dependent Claim
114 words
A process for spraying aqueous liquid pesticidal formulations utilizing an earthed sprayhead in the form of a conductive disc or cup, and a circular electrode adjacent the edge of the disc or cup, comprising the steps of: rotating the conductor disc or cup at a speed in the range of 1,000-8,000 revolutions per minutes; supplying aqueous liquid pesticidal formulations to the rotating disc or cup so that it atomizes, with droplets thereof leaving the edge of the rotating disc or cup; and inducing an electrical charge on the formulation as it atomizes from the edge of the rotating disc or cup by charging the electrode to a potential in the range of 1-3 kilovolts.
Claim 8
Dependent Claim
114 words
A process for spraying aqueous liquid pesticidal formulations utilizing an earthed sprayhead in the form of a conductive disc or cup, and a circular electrode adjacent the edge of the disc or cup, comprising the steps of: rotating the conductor disc or cup at a speed in the range of 1,000-8,000 revolutions per minutes; supplying aqueous liquid pesticidal formulations to the rotating disc or cup so that it atomizes, with droplets thereof leaving the edge of the rotating disc or cup; and inducing an electrical charge on the formulation as it atomizes from the edge of the rotating disc or cup by charging the electrode to a potential in the range of 1-3 kilovolts.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |