US3412292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control relay circuits employing proximity switches for energizing liquidflow controlers
Assignee: Trane US Inc
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Filing: 1966-05-12
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Granted: 1968-11-19
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Expires: 1986-05-12
Abstract
No abstract record available.
Inventors
- 👤 Norman A Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:48
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A LIQUID-FLOW CONTROL SYSTEM WHEREIN A PROXIMITY SWITCH MEANS CONTROLS THE OPERATION OF AN ELECTROMECHANICAL LIQUID-FLOW CONTROLLER, THE PROXIMITY SWITCH TRANSMITTING AN ELECTRIC CURRENT WHEN ACTIVATED AND THE LIQUIDFLOW CONTROLLER PERMITTING THE FLOW OF LIQUID WHEN RECEIVING AN ELECTRIC CURRENT, THE IMPROVEMENT COMPRISING: A SOURCE OF ELECTRIC CURRENT; AN ELECTRIC CURRENT OPERATED SWITCHING MEANS CONNECTED TO THE PROXIMITY SWITCH MEANS AND ENERGIZED WHEN RECEIVING ELECTRIC CURRENT THEREFROM, SAID SWITCHING MEANS INCLUDING A FIRST CURRENT-FLOW CONTROL CIRCUIT HAVING AN INPUT AND AN OUTPUT WHEREIN ELECTRIC CURRENT CAN FLOW FROM SAID INPUT TO SAID OUTPUT ONLY WHEN SAID SWITCHING MEANS IS ENERGIZED AND A SECOND CURRENT-FLOW CONTROL CIRCUIT HAVING AN INPUT AND AN OUTPUT WHEREIN ELECTRIC CURRENT CAN FLOW FROM SAID INPUT TO SAID OUTPUT ONLY WHEN SAID SWITCHING MEANS IS DEENERGIZED; MEANS FOR CONNECTING THE INPUT OF SAID FIRST CURRENT-FLOW CONTROL CIRCUIT TO SAID SOURCE OF ELECTRIC CURRENT; A DIS-
Claim 2
Dependent Claim
150 words
IN A LIQUID-FLOW CONTROL SYSTEM WHEREIN A PROXIMITY SWITCH MEANS CONTROLS THE OPERATION OF AN ELECTROMECHANICAL LIQUID-FLOW CONTROLLER, THE PROXIMITY SWITCH TRANSMITTING AN ELECTRIC CURRENT WHEN ACTIVATED AND THE LIQUIDFLOW CONTROLLER PERMITTING THE FLOW OF LIQUID WHEN RECEIVING AN ELECTRIC CURRENT, THE IMPROVEMENT COMPRISING: A SOURCE OF ELECTRIC CURRENT; AN ELECTRIC CURRENT OPERATED SWITCHING MEANS CONNECTED TO THE PROXIMITY SWITCH MEANS AND ENERGIZED WHEN RECEIVING ELECTRIC CURRENT THEREFROM, SAID SWITCHING MEANS INCLUDING A FIRST CURRENT-FLOW CONTROL CIRCUIT HAVING AN INPUT AND AN OUTPUT WHEREIN ELECTRIC CURRENT CAN FLOW FROM SAID INPUT TO SAID OUTPUT ONLY WHEN SAID SWITCHING MEANS IS ENERGIZED AND A SECOND CURRENT-FLOW CONTROL CIRCUIT HAVING AN INPUT AND AN OUTPUT WHEREIN ELECTRIC CURRENT CAN FLOW FROM SAID INPUT TO SAID OUTPUT ONLY WHEN SAID SWITCHING MEANS IS DEENERGIZED; MEANS FOR CONNECTING THE INPUT OF SAID FIRST CURRENT-FLOW CONTROL CIRCUIT TO SAID SOURCE OF ELECTRIC CURRENT; A DIS-
References Cited (Backward Citations)
US3032270A
Cited
US3234408A
Cited
US3134986A
Cited
US3210658A
Cited
US3341746A
Cited
US3314081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |