US3082698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump operated on pressure differential
Assignee: Techno Corp
•
Filing: 1959-04-09
•
Granted: 1963-03-26
•
Expires: 1979-04-09
Abstract
No abstract record available.
Inventors
- 👤 Edward M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/06; F04B43/073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PUMP COMPRISING A TANK, A MEMBER HAVING AN INLET AND AN OUTLET SPACED THEREFROM, SAID MEMBER BEING CONNECTED TO SAID TANK AT AN INTERMEDIATE PART THEREOF, SAID OUTLET HAVING A CHECK VALVE ALLOWING LIQUID TO FLOW FROM SAID TANK BUT OBSTRUCTING THE FLOW OF LIQUID TO SAID TANK FROM SAID OUTLET, VALVE ACTUATING MEANS CONNECTED TO SAID MEMBER BETWEEN SAID INLET AND SAID OUTLET AND SENSITIVE TO THE PRESSURE HEAD OF LIQUID IN SAID TANK, AND A CONTROL VALVE, SAID VALVE ACTUATING MEANS BEING CONNECTED TO SAID CONTROL VALVE, SAID CONTROL VALVE CONNECTING A SOURCE OF COMPRESSED AIR TO SAID TANK WHEN SAID VALVE ACTUATING MEANS ACTUATES IT AND DISCONNECTING SAID SOURCE OF COMPRESSED AIR FROM SAID TANK WHEN SAID CONTROL VALVE IS DEACTUATED.
Claim 2
Dependent Claim
125 words
A PUMP COMPRISING A TANK, A MEMBER HAVING AN INLET AND AN OUTLET SPACED THEREFROM, SAID MEMBER BEING CONNECTED TO SAID TANK AT AN INTERMEDIATE PART THEREOF, SAID OUTLET HAVING A CHECK VALVE ALLOWING LIQUID TO FLOW FROM SAID TANK BUT OBSTRUCTING THE FLOW OF LIQUID TO SAID TANK FROM SAID OUTLET, VALVE ACTUATING MEANS CONNECTED TO SAID MEMBER BETWEEN SAID INLET AND SAID OUTLET AND SENSITIVE TO THE PRESSURE HEAD OF LIQUID IN SAID TANK, AND A CONTROL VALVE, SAID VALVE ACTUATING MEANS BEING CONNECTED TO SAID CONTROL VALVE, SAID CONTROL VALVE CONNECTING A SOURCE OF COMPRESSED AIR TO SAID TANK WHEN SAID VALVE ACTUATING MEANS ACTUATES IT AND DISCONNECTING SAID SOURCE OF COMPRESSED AIR FROM SAID TANK WHEN SAID CONTROL VALVE IS DEACTUATED.
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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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |