Patent US2971857A successfully refreshed from Google Patents.
US3770198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for diluting and mixing chemical solution for agriculture
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1972-03-24
•
Granted: 1973-11-06
•
Expires: 1992-03-24
Abstract
Abstract A chemical solution such as farm chemicals, pesticides or liquid fertilizers is injected and mixed under pressure at a predetermined rate into pressurized water and automatically controlled when spraying of the diluted and mixed chemical solution is discontinued or restarted, by means of an apparatus comprising a pressurized water conduit provided with an orifice and a connecting part successively in a water flow passage, a forward end of the water conduit being connected to a spraying means, a pressurized chemical solution conduit provided with a stop valve, a pressure regulator valve and an orifice successively in a solution conduit, a forward end of the solution conduit being connected with the connecting part of the pressurized water conduit, a pressure regulator mechanism capable of detecting pressures at upstream sides of the orifices of the pressurized water conduit and the pressurized chemical solution conduit, respectively, and equilibrating the pressures through a pressure regulator valve synchronized with a controlling device, and a mechanism capable of detecting flow rates through pressure differences between the upstream and downstream of the respective orifices of the pressurized water conduit and the pressurized chemical solution conduit by means of a flow rate checking means, and synchronizing the pressure differences with opening or closing of the stop valve through a valve-operating monitor.
Inventors
- 👤 K Mihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; A; A01; A01C; A01C23/00; A01C23/04; A01C23/042; G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/135; G05D11/138; G05D21/00; G05D21/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2509; Y10T137/2514; Y10T137/2521
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
185 words
An apparatus for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises a water conduit provided with an orifice and a connecting part successively in a water flow passage, a chemical solution conduit provided with a pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, a liquidspraying means connected to a forward end of the connecting part of the water conduit, a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices, a stop valve at an upstream side of said pressure regulator valve in the chemical solution conduit, a flow rate-detecting means in said water conduit to detect a pressure difference between the upstream side and the downstream side of the orifice, and a valve-operating monitor to receive a signal from the flow rate-detecting means to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquidspraying means.
Claim 2
Independent Claim
185 words
An apparatus for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises a water conduit provided with an orifice and a connecting part successively in a water flow passage, a chemical solution conduit provided with a pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, a liquidspraying means connected to a forward end of the connecting part of the water conduit, a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices, a stop valve at an upstream side of said pressure regulator valve in the chemical solution conduit, a flow rate-detecting means in said water conduit to detect a pressure difference between the upstream side and the downstream side of the orifice, and a valve-operating monitor to receive a signal from the flow rate-detecting means to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquidspraying means.
Claim 3
Dependent Claim
76 words
An apparatus according to claim 1, wherein a flow rate-detecting means is provided in the chemical solution conduit to detect a pressure difference between an upstream side and a downstream side of the orifice and transfer a flow rate signal to the valve-operating monitor, and the stop valve is automatically closed when the chemical solution flows through the conduit at a mixing ratio in excess of a predetermined one, based on a flow rate of water.
Claim 4
Independent Claim
206 words
A method for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises passing water through a water conduit provided with an orifice having a flow rate-detecting means to detect a pressure difference between the upstream side and the downstream side of the orifice, and a connecting part successively in a water flow passage to a liquid-spraying means connected to a forward end of the connecting part of the water conduit, while passing a chemical solution through a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upstream side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, and mixing the water with the chemical solution at the connecting part under control of a controller to regulate the degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices while having a valve-operating monitor receiving a signal from the flow rate-detecting means so as to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquid-spraying means.
Claim 5
Independent Claim
206 words
A method for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises passing water through a water conduit provided with an orifice having a flow rate-detecting means to detect a pressure difference between the upstream side and the downstream side of the orifice, and a connecting part successively in a water flow passage to a liquid-spraying means connected to a forward end of the connecting part of the water conduit, while passing a chemical solution through a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upstream side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, and mixing the water with the chemical solution at the connecting part under control of a controller to regulate the degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices while having a valve-operating monitor receiving a signal from the flow rate-detecting means so as to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquid-spraying means.
Claim 6
Dependent Claim
76 words
A method according to claim 3, wherein a flow rate-detecting means is provided in the chemical solution conduit to detect a pressure difference between an up-stream side and a downstream side of the orifice and transfer a flow rate signal to the valve-operating monitor, and the stop valve is automatically closed when the chemical solution flows through the conduit at a mixing ratio in excess of a predeteRmined one, based on a flow rate of water.
Claim 7
Independent Claim
180 words
An apparatus for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises a water conduit provided with an orifice and a connecting part successively in a water flow passage, a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upstream side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, a liquid-spraying means connected to a forward end of the connecting part of the water conduit, a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices, a valve-operating monitor which operates the stop valve and a liquid concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit to transfer a concentration signal to said valve-operating monitor, whereby said stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 8
Independent Claim
180 words
An apparatus for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises a water conduit provided with an orifice and a connecting part successively in a water flow passage, a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upstream side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, a liquid-spraying means connected to a forward end of the connecting part of the water conduit, a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices, a valve-operating monitor which operates the stop valve and a liquid concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit to transfer a concentration signal to said valve-operating monitor, whereby said stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 9
Independent Claim
232 words
An apparatus for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises a water conduit provided with an orifice and a connecting part successively in a water flow passage, a chemical solution conduit provided with a pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, a liquid-spraying means connected to a forward end of the connecting part of the water conduit, a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices, a stop valve at an upstream side of said pressure regulator valve in the chemical solution conduit, a flow rate-detecting means in said water conduit to detect a pressure difference between the upstream side and the downstream side of the orifice, and a valve-operating monitor to receive a signal from the flow rate-detecting means to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquid-spraying means, concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit to transfer a concentration signal to the valve-operating monitor whereby the stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 10
Independent Claim
232 words
An apparatus for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises a water conduit provided with an orifice and a connecting part successively in a water flow passage, a chemical solution conduit provided with a pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, a liquid-spraying means connected to a forward end of the connecting part of the water conduit, a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices, a stop valve at an upstream side of said pressure regulator valve in the chemical solution conduit, a flow rate-detecting means in said water conduit to detect a pressure difference between the upstream side and the downstream side of the orifice, and a valve-operating monitor to receive a signal from the flow rate-detecting means to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquid-spraying means, concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit to transfer a concentration signal to the valve-operating monitor whereby the stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 11
Independent Claim
201 words
A method for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises passing water through a water conduit provided with an orifice and a connecting part sucessively in a water flow passage to a liquid-spraying means connected to a forward end of the connecting part of the water conduit, while passing a chemical solution through a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upsteam side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, and mixing the water with the chemical solution at the connecting part under control of a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices with a liquid concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit transferring a concentration signal to a valve-operating monitor which operates the stop valve whereby the stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 12
Independent Claim
201 words
A method for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, which comprises passing water through a water conduit provided with an orifice and a connecting part sucessively in a water flow passage to a liquid-spraying means connected to a forward end of the connecting part of the water conduit, while passing a chemical solution through a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upsteam side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, and mixing the water with the chemical solution at the connecting part under control of a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices with a liquid concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit transferring a concentration signal to a valve-operating monitor which operates the stop valve whereby the stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 13
Independent Claim
256 words
A method for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, whiCh comprises passing water through a water conduit provided with an orifice having a flow rate-detecting means to detect a pressure difference between the upstream side and the downstream side of the orifice, and a connecting part successively in a water flow passage to a liquid-spraying means connected to a forward end of the connecting part of the water conduit, while passing a chemical solution through a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upstream side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, and mixing the water with the chemical solution at the connecting part under control of a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices while having a valve-operating monitor receiving a signal from the flow rate-detecting means so as to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquid-spraying means and having a concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit to transfer a concentration signal to the valve-operating monitor whereby the stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
Claim 14
Independent Claim
256 words
A method for diluting and mixing a chemical solution for agriculture with water to a predetermined mixing proportion, whiCh comprises passing water through a water conduit provided with an orifice having a flow rate-detecting means to detect a pressure difference between the upstream side and the downstream side of the orifice, and a connecting part successively in a water flow passage to a liquid-spraying means connected to a forward end of the connecting part of the water conduit, while passing a chemical solution through a chemical solution conduit provided with a pressure regulator valve having a stop valve provided at an upstream side of the pressure regulator valve and an orifice successively in a chemical solution flow passage and connected to the connecting part of the water conduit, and mixing the water with the chemical solution at the connecting part under control of a controller to regulate a degree of opening of the pressure regulator valve in correspondence with a pressure at an upstream side of the orifices while having a valve-operating monitor receiving a signal from the flow rate-detecting means so as to operate the stop valve, whereby the stop valve is automatically closed or opened in correspondence with the use of the liquid-spraying means and having a concentration-detecting means at a downstream side of the connecting part at a joint of the water conduit and the chemical solution conduit to transfer a concentration signal to the valve-operating monitor whereby the stop valve is closed when the concentration of mixed solution exceeds a predetermined one.
References Cited (Backward Citations)
US2265961A
Cited
US2657091A
Cited
US2823740A
Cited
US3047003A
Cited
US3519010A
Cited
US3464626A
Cited
US3685531A
Cited
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 |