US3567120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for spreading powder and device therefor
Assignee: Mitsubishi Heavy Industries Ltd
•
Filing: 1968-04-23
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Granted: 1971-03-02
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Expires: 1988-04-23
Abstract
Abstract A method for spreading powder in which air under pressure carrying a pulverulent treating agent in the form of powder and/or granular material is forced into a soft and light tubular pipe from one end or both ends thereof and discharged or spread downwardly through a plurality of nozzles disposed spaced apart from each other longitudinally of the tubular pipe.
Inventors
- 👤 Nakao Suda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:04
CPC Classifications
A; A01; A01C; A01C15/00; A01C15/04; A01M; A01M9/00; A01M9/0092
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A method of spreading a pulverulent treating agent over an area to be treated comprising the steps of maintaining an elongated laterally confined column of air under pressure, carrying the pulverulent treating agent, directed substantially horizontally and rectilinearly above the area to be treated; at longitudinally spaced locations along the laterally confined column, directing plural discrete jets of the air, carrying the pulverulent treating agent, downwardly from the column onto the area to be treated; during treatment of the area, continuously supplying additional air under pressure, carrying the pulverulent treating agent, to at least one end of the column; and utilizing the reaction force of the jets against the treated area to support the laterally confined column above the area.
Claim 2
Independent Claim
120 words
A method of spreading a pulverulent treating agent over an area to be treated comprising the steps of maintaining an elongated laterally confined column of air under pressure, carrying the pulverulent treating agent, directed substantially horizontally and rectilinearly above the area to be treated; at longitudinally spaced locations along the laterally confined column, directing plural discrete jets of the air, carrying the pulverulent treating agent, downwardly from the column onto the area to be treated; during treatment of the area, continuously supplying additional air under pressure, carrying the pulverulent treating agent, to at least one end of the column; and utilizing the reaction force of the jets against the treated area to support the laterally confined column above the area.
Claim 3
Dependent Claim
48 words
A method of spreading a pulverulent treating agent over an area to be treated, as claimed in claim 1, including the step of moving said column in a substantially horizontal plane in a direction laterally of the length of said column and above the area to be treated.
Claim 4
Dependent Claim
50 words
A method of spreading a pulverulent treating agent over an area to be treated, as claimed in claim 1, including the step of maintaining the column in spaced substantially parallel relation above the area to be treated while moving the column laterally of itself over the area to be treated.
Claim 5
Dependent Claim
46 words
A method of spreading a pulverulent treating agent over an area to be treated, as claimed in claim 2, including the step of swinging the column substantially horizontally, over the area to be treated, about a substantially vertical pivot axis at one end of the column.
Claim 6
Dependent Claim
40 words
A method of spreading a pulverulent treating agent over an area to be treated, as claimed in claim 1, including the step of adjusting the length of the column in accordance with the extent of the arEa to be treated.
Claim 7
Dependent Claim
31 words
A method of spreading a pulverulent treating agent over an area to be treated, as claimed in claim 1, including the step of vibrating the column during treating of the area.
References Cited (Backward Citations)
US483269A
Cited
US1058752A
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US1538779A
Cited
US2388798A
Cited
US2740230A
Cited
US3341125A
Cited
US3439875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |