US3552552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rod-type screen for suspension fertilizers
Assignee: Decatur Foundry and Machine Co Inc
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Filing: 1968-07-17
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Granted: 1971-01-05
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Expires: 1988-07-17
Abstract
Abstract A liquid fertilizer strainer screen for efficiently screening suspension fertilizers to prevent clogging of nozzles and orifices handling the fertilizer comprising a plurality of small diameter rods equispaced about one-sixteenth of an inch apart mounted at each end in nylon rings to form a cylinder, said rods being reinforced substantially midway by a band of nylon that extends around the outside of the rods. The screen is disposed at an angle within and is a part of a fertilizer strainer, which also includes a casing adapted to be disposed in a liquid fertilizer line for straining the fertilizer as it passes through the screen.
Inventors
- 👤 Douglas Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:32
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D29/00; B01D29/11; B01D29/31; B01D29/35
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
In combination, a stainer for screening suspension fertilizers, upflow from discharge means of a dispensing machine, comprising a casing including means for connecting said strainer in a line adapted to receive a flow of suspension fertilizer, and a screen mounted in said casing including a plurality of cylindrical rodlike members and means holding said members in spaced relation permitting flow of suspension fertilizer, therebetween, said rodlike members being spaced-apart a distance substantially the diameter of the orifices of the machine to which said strainer is applied, said screen having an open end adapted to receive a flow of suspension fertilizer, and another end adapted to be disposed out of the normal line of flow of a suspension fertilizer, through said strainer, the inwardly directed surfaces of said rodlike members being free of obstruction from end-to-end to permit suspension fertilizer crystals strained from a flow to slide to the last-mentioned end of the screen.
Claim 2
Dependent Claim
153 words
In combination, a stainer for screening suspension fertilizers, upflow from discharge means of a dispensing machine, comprising a casing including means for connecting said strainer in a line adapted to receive a flow of suspension fertilizer, and a screen mounted in said casing including a plurality of cylindrical rodlike members and means holding said members in spaced relation permitting flow of suspension fertilizer, therebetween, said rodlike members being spaced-apart a distance substantially the diameter of the orifices of the machine to which said strainer is applied, said screen having an open end adapted to receive a flow of suspension fertilizer, and another end adapted to be disposed out of the normal line of flow of a suspension fertilizer, through said strainer, the inwardly directed surfaces of said rodlike members being free of obstruction from end-to-end to permit suspension fertilizer crystals strained from a flow to slide to the last-mentioned end of the screen.
Claim 3
Dependent Claim
18 words
The combination of claim 1 in which said rodlike members are about one-sixteenth of an inch in diameter.
Claim 4
Dependent Claim
118 words
A screen for straining suspension fertilizer, being dispensed to soil, comprising a plurality of cylindrical rodlike members, means hold said members in spaced relation permitting flow of suspension fertilizer therebetween, said rodlike members being spaced-apart a distance substantially the diameter of the orifices of the machine to which said strainer is applied, and having an open end adapted to receive a flow of suspension fertilizer, and another end adapted to be disposed out of the normal line of flow of a suspension fertilizer, the inwardly directed surfaces of said rodlike members being free of obstruction from end-to-end to permit suspension fertilizer crystals and other material strained from a flow to slide to the last-mentioned end of the screen.
Claim 5
Dependent Claim
118 words
A screen for straining suspension fertilizer, being dispensed to soil, comprising a plurality of cylindrical rodlike members, means hold said members in spaced relation permitting flow of suspension fertilizer therebetween, said rodlike members being spaced-apart a distance substantially the diameter of the orifices of the machine to which said strainer is applied, and having an open end adapted to receive a flow of suspension fertilizer, and another end adapted to be disposed out of the normal line of flow of a suspension fertilizer, the inwardly directed surfaces of said rodlike members being free of obstruction from end-to-end to permit suspension fertilizer crystals and other material strained from a flow to slide to the last-mentioned end of the screen.
Claim 6
Dependent Claim
18 words
The combination of claim 3 in which said rodlike members are about one-sixteeth of an inch in diameter.
Claim 7
Dependent Claim
60 words
The combination of claim 1 and including means supporting said rodlike members between the ends preventing spreading under pressures in use, said supporting means being disposed externally of said screen leaving said rodlike members free of obstruction internally so that crystals and other material strained from a flow can slide to the end of the screen out of the flow.
Claim 8
Dependent Claim
64 words
The combination of claim 3 and including means supporting said rodlike members between the ends preventing spreading under pressures in use, said supporting means being disposed externally of said screen leaving said rodlike members free of obstruction internally so that crystals and other material strained from a flow can slide to the end of the screen adapted to be disposed out of the flow.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |