US3223041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump control system
Assignee: Zyrotron Ind Inc
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Filing: 1963-02-08
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Granted: 1965-12-14
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Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Frederic R Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:37
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A PUMP CONTROL SYSTEM FOR A LIQUID RESERVOIR, COMPRISING A PUMP AND A MOTOR TO OPERATE SAID PUMP; A SOURCE OF VOLTAGE; A FIRST SENSOR POSITIONED TO SENSE A LOW LIQUID LEVEL IN SAID RESERVOIR; A SECOND SENSOR POSITIONED TO SENSE A HIGH LIQUID LEVEL IN SAID RESERVOIR; A FIRST RELAY RESPONSIVE TO SAID FIRST SENSOR AND HAVING TO NORMALLY OPEN RELAY FRONT SWITCH AND CONNECTED TO BE ENERGIZED THROUGH SAID FIRST SENSOR TO OPERATED SAID OPEN FRONT SWITCH TO CLOSED POSITION WHENEVER THE LIQUID LEVEL IS BELOW SAID FIRST SENSOR; A SECOND RELAY HAVING A NORMALLY OPEN RELAY FRONT SWITCH OPERABLE TO CLOSED POSITION WHEN THE RELAY IS ENERGIZED, AND HAVING A NORMALLY CLOSED RELAY BACK SWITCH OPERABLE TO OPEN POSITION WHEN THE RELAY IS ENERGIZED; MEANS CONNECTING SAID SECOND SENSOR TO SAID SECOND RELAY WHEREBY SAID SECOND RELAY WILL BE DE-ENERGIZED WHEN SAID LIQUID LEVEL REACHES AND AFFECTS SAID SECOND SENSOR; MEANS CONNECTING BOTH SAID RELAY FRONT SWITCHES IN PARALLEL TO ENERGIZE THE SECOND RELAY FROM SAID VOLTAGE SOURCE; AND MEANS CONNECTING SAID SECOND RELAY BACK SWITCH IN AN EXTERNAL CIRCUIT TO CONTROL THE PUMP MOTOR.
Claim 2
Dependent Claim
188 words
A PUMP CONTROL SYSTEM FOR A LIQUID RESERVOIR, COMPRISING A PUMP AND A MOTOR TO OPERATE SAID PUMP; A SOURCE OF VOLTAGE; A FIRST SENSOR POSITIONED TO SENSE A LOW LIQUID LEVEL IN SAID RESERVOIR; A SECOND SENSOR POSITIONED TO SENSE A HIGH LIQUID LEVEL IN SAID RESERVOIR; A FIRST RELAY RESPONSIVE TO SAID FIRST SENSOR AND HAVING TO NORMALLY OPEN RELAY FRONT SWITCH AND CONNECTED TO BE ENERGIZED THROUGH SAID FIRST SENSOR TO OPERATED SAID OPEN FRONT SWITCH TO CLOSED POSITION WHENEVER THE LIQUID LEVEL IS BELOW SAID FIRST SENSOR; A SECOND RELAY HAVING A NORMALLY OPEN RELAY FRONT SWITCH OPERABLE TO CLOSED POSITION WHEN THE RELAY IS ENERGIZED, AND HAVING A NORMALLY CLOSED RELAY BACK SWITCH OPERABLE TO OPEN POSITION WHEN THE RELAY IS ENERGIZED; MEANS CONNECTING SAID SECOND SENSOR TO SAID SECOND RELAY WHEREBY SAID SECOND RELAY WILL BE DE-ENERGIZED WHEN SAID LIQUID LEVEL REACHES AND AFFECTS SAID SECOND SENSOR; MEANS CONNECTING BOTH SAID RELAY FRONT SWITCHES IN PARALLEL TO ENERGIZE THE SECOND RELAY FROM SAID VOLTAGE SOURCE; AND MEANS CONNECTING SAID SECOND RELAY BACK SWITCH IN AN EXTERNAL CIRCUIT TO CONTROL THE PUMP MOTOR.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |