Patent US3559936A successfully refreshed from Google Patents.
Patent US3198121A successfully refreshed from Google Patents.
US3198121A
Expired / Lapsed
US
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Tankless water pressure system
Assignee: Syncroflo Inc
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Filing: 1962-09-26
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Granted: 1965-08-03
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Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 Robert F Schaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:58
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A TANKLESS WATER PRESSURE SYSTEM COMPRISING A PLURALITY OF PUMPS OF DIFFERENT SIZES CONNECTED IN PARALLEL BETWEEN A SOURCE OF WATER AND A WATER LINE CONDUIT, CONTROL MEANS IN SAID WATER LINE CONDUIT AND BEING RESPONSIVE TO THE FLOW OF WATER THEREIN, SAID CONTROL MEANS BEING ADAPTED TO CAUSE ONLY A SMALLER OF SAID PUMPS TO CONTINUOUSLY OPERATE BELOW A PREDETERMINED FLOW RATE IN SAID WATER LINE CONDUIT AND ALSO BEING ADAPTED TO OPERATE A LARGER OF SAID PUMPS WHEN THE FLOW IN SAID WATER LINE CONDUIT IS ABOVE SAID PREDETERMINED RATE, A RESTRICTED BYPASS AROUND SAID SMALLER PUMP FOR ALLOWING THE CIRCULATION OF
Claim 2
Dependent Claim
104 words
A TANKLESS WATER PRESSURE SYSTEM COMPRISING A PLURALITY OF PUMPS OF DIFFERENT SIZES CONNECTED IN PARALLEL BETWEEN A SOURCE OF WATER AND A WATER LINE CONDUIT, CONTROL MEANS IN SAID WATER LINE CONDUIT AND BEING RESPONSIVE TO THE FLOW OF WATER THEREIN, SAID CONTROL MEANS BEING ADAPTED TO CAUSE ONLY A SMALLER OF SAID PUMPS TO CONTINUOUSLY OPERATE BELOW A PREDETERMINED FLOW RATE IN SAID WATER LINE CONDUIT AND ALSO BEING ADAPTED TO OPERATE A LARGER OF SAID PUMPS WHEN THE FLOW IN SAID WATER LINE CONDUIT IS ABOVE SAID PREDETERMINED RATE, A RESTRICTED BYPASS AROUND SAID SMALLER PUMP FOR ALLOWING THE CIRCULATION OF
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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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |