Patent US3563671A successfully refreshed from Google Patents.
US3563671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump control
Assignee: Weber Ind Inc
•
Filing: 1969-10-01
•
Granted: 1971-02-16
•
Expires: 1989-10-01
Abstract
Abstract A PUMP CONTROL ADAPTED OR USE WITHIN A PUMP SYSTEM HAVING AN OUTLET PIPE AND WITH SAID CONTROL BEING CONNECTED TO SAID OUTLET PIPE. SAID CONTROL COMPRISES AN EXPANSIBLE PRESSURE CHAMBER IN COMMUNICATION WITH SAID PUMP OUTLET PIPE THROUGH A BY-PASS, THERE BEING A VALVE DISPOSED ACROSS THE NORMALLY DIRECT FLOW PATH BETWEEN SAID OUTLET PUMP AND SAID PRESSURE CHAMBER AND BEING SUBJECTED TO THE PRESSURE DIFFERENTIAL. A PRESSURE SWITCH AS OF THE DIAPHRAGM TYPE IS PRESENTED FOR RESPONSE TO PRESSURE WITHIN SAID PRESSURE CHAMBER AND CONNECTED TO SAID PUMP FOR DE-ENERGIZING SAME UPON THE ATTAINMENT OF A PREDETERMINED PRESSURE WITHIN SAID PRESSURE CHAMBER.
Inventors
- 👤 Anthony V Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:35
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |