US3380468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid infusion apparatus
Assignee: KE MARC RES DIV
•
Filing: 1964-06-18
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Granted: 1968-04-30
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Expires: 1984-06-18
Abstract
No abstract record available.
Inventors
- 👤 Folden Norman Chip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:44
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/003; A; A01; A01C; A01C23/00; A01C23/04; A01C23/042; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2529; Y10T137/2559; Y10T137/2564; Y10T137/2572
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
APPARATUS FOR INFUSING FLUID CONCENTRATE INTO THE WATER FLOW WITHIN A CLOSED CONDUIT OF AN IRRIGATION SYSTEM, OF THE TYPE HAVING A SHUT OFF VALVE IN THE CONDUIT AND WITH SAID APPARATUS CONNECTING INTO THE CONDUIT AT A LOCATION ADJACENT TO AND DOWNSTREAM FROM THE VALVE WHERE A BACK PRESSURE OCCURS IN THE CONDUIT WHENEVER THE VALVE IS OPENED TO PERMIT FLOW THERETHROUGH, AND WHERE NEGATIVE PRESSURE OCCURS WHENEVER THE VALVE CLOSES, AND COMPRISING, IN COMBINATION THEREWITH: (A) A CONTAINER ADAPTED TO HOLD A SUPPLY OF FLUID CONCENTRATE; (B) A FLUID LINE EXTENDING FROM THE CONTAINER AND TO THE CONDUIT AT SAID LOCATION ADJACENT TO AND DOWNSTREAM FROM THE VALVE WHERE SAID BACK PRESSURE, RESPONSIVE TO OPENING THE VALVE, AND SAID NEGATIVE PRESSURE, RESPONSIVE TO CLOSING OF THE VALVE, ARE FELT IN THE FLUID LINE; (C) A POSITIVE DISPLACEMENT PUMP IN THE FLUID LINE INCLUDING AN ELECTRICAL POWER CIRCUIT ADAPTED TO OPERATE THE PUMP WHEN THE CIRCUIT IS CLOSED, SAID PUMP BEING ADAPTED TO PUMP FLUID CONCENTRATE THROUGH THE FLUID LINE FROM THE CONTAINER AND TO THE CONDUIT AT A SELECTED CONSTANT RATE; (D) A PRESSURE-RESPONSIVE CONTROL MEANS IN THE FLUID LINE BELOW THE INFUSION PUMP, INCLUDING A NORMALLY
Claim 2
Dependent Claim
199 words
APPARATUS FOR INFUSING FLUID CONCENTRATE INTO THE WATER FLOW WITHIN A CLOSED CONDUIT OF AN IRRIGATION SYSTEM, OF THE TYPE HAVING A SHUT OFF VALVE IN THE CONDUIT AND WITH SAID APPARATUS CONNECTING INTO THE CONDUIT AT A LOCATION ADJACENT TO AND DOWNSTREAM FROM THE VALVE WHERE A BACK PRESSURE OCCURS IN THE CONDUIT WHENEVER THE VALVE IS OPENED TO PERMIT FLOW THERETHROUGH, AND WHERE NEGATIVE PRESSURE OCCURS WHENEVER THE VALVE CLOSES, AND COMPRISING, IN COMBINATION THEREWITH: (A) A CONTAINER ADAPTED TO HOLD A SUPPLY OF FLUID CONCENTRATE; (B) A FLUID LINE EXTENDING FROM THE CONTAINER AND TO THE CONDUIT AT SAID LOCATION ADJACENT TO AND DOWNSTREAM FROM THE VALVE WHERE SAID BACK PRESSURE, RESPONSIVE TO OPENING THE VALVE, AND SAID NEGATIVE PRESSURE, RESPONSIVE TO CLOSING OF THE VALVE, ARE FELT IN THE FLUID LINE; (C) A POSITIVE DISPLACEMENT PUMP IN THE FLUID LINE INCLUDING AN ELECTRICAL POWER CIRCUIT ADAPTED TO OPERATE THE PUMP WHEN THE CIRCUIT IS CLOSED, SAID PUMP BEING ADAPTED TO PUMP FLUID CONCENTRATE THROUGH THE FLUID LINE FROM THE CONTAINER AND TO THE CONDUIT AT A SELECTED CONSTANT RATE; (D) A PRESSURE-RESPONSIVE CONTROL MEANS IN THE FLUID LINE BELOW THE INFUSION PUMP, INCLUDING A NORMALLY
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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) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |