Patent US6326758B1 successfully refreshed from Google Patents.
US3131676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed water supply system
Assignee: Malsbary Manufacturing Co
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Filing: 1961-04-17
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Granted: 1964-05-05
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Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Carlyle O Telford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:07
CPC Classifications
F; F22; F22D; F22D11/00; F22D11/02; F22D11/06; F22D5/00; F22D5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A PUMPING SYSTEM FOR SUPPLYING LIQUID AT A CONSTANT RATE TO AN APPARATUS FROM A FIRST SOURCE OF THE LIQUID UNDER PRESSURE AND FROM A SECOND SOURCE OF THE LIQUID AT A LOWER PRESSURE, A FIRST PUMP HAVING AN INTAKE CONDUIT ADAPTED FOR CONNECTION TO SAID FIRST SOURCE AND AN OUTPUT CONDUIT ADAPTED FOR CONNECTION TO SAID APPARATUS, A SECOND PUMP HAVING AN INTAKE CONDUIT ADAPTED FOR CONNECTION TO SAID SECOND SOURCE AND AN OUTPUT CONDUIT CONNECTED TO SAID FIRST PUMP, A SHUT-OFF DEVICE MOUNTED IN SAID INTAKE CONDUIT OF SAID FIRST PUMP, AND PRESSURE-RESPONSIVE CONTROL MEANS CONNECTED TO SAID SECOND PUMP AND TO THE INTAKE CONDUIT OF SAID FIRST PUMP UPSTREAM OF SAID SHUT-OFF DEVICE SO AS TO BE RESPONSIVE TO THE CONDITION OF THE SHUTOFF DEVICE AND FORMED TO PREVENT PUMPING OF LIQUID FROM SAID SECOND SOURCE BY SAID SECOND PUMP TO SAID FIRST PUMP WHILE SAID SHUTOFF DEVICE IS OPEN.
Claim 2
Dependent Claim
154 words
IN A PUMPING SYSTEM FOR SUPPLYING LIQUID AT A CONSTANT RATE TO AN APPARATUS FROM A FIRST SOURCE OF THE LIQUID UNDER PRESSURE AND FROM A SECOND SOURCE OF THE LIQUID AT A LOWER PRESSURE, A FIRST PUMP HAVING AN INTAKE CONDUIT ADAPTED FOR CONNECTION TO SAID FIRST SOURCE AND AN OUTPUT CONDUIT ADAPTED FOR CONNECTION TO SAID APPARATUS, A SECOND PUMP HAVING AN INTAKE CONDUIT ADAPTED FOR CONNECTION TO SAID SECOND SOURCE AND AN OUTPUT CONDUIT CONNECTED TO SAID FIRST PUMP, A SHUT-OFF DEVICE MOUNTED IN SAID INTAKE CONDUIT OF SAID FIRST PUMP, AND PRESSURE-RESPONSIVE CONTROL MEANS CONNECTED TO SAID SECOND PUMP AND TO THE INTAKE CONDUIT OF SAID FIRST PUMP UPSTREAM OF SAID SHUT-OFF DEVICE SO AS TO BE RESPONSIVE TO THE CONDITION OF THE SHUTOFF DEVICE AND FORMED TO PREVENT PUMPING OF LIQUID FROM SAID SECOND SOURCE BY SAID SECOND PUMP TO SAID FIRST PUMP WHILE SAID SHUTOFF DEVICE IS OPEN.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |