US3095819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free piston pumping system
Assignee: US Industries Inc
•
Filing: 1959-12-02
•
Granted: 1963-07-02
•
Expires: 1979-12-02
Abstract
No abstract record available.
Inventors
- 👤 Norman F Brown
- 👤 Clifford M Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A FREE PISTON PUMPING SYSTEM COMPRISING IN A COMBINATION A WELLHEAD; A LUBRICATOR HAVING A SECTION MADE OF NON-MAGNETIC MATERIAL SUPERIMPOSED ON THE WELLHEAD; A PRODUCTION LINE HAVING A BORE COMMON TO THAT OF THE LUBRICATOR EXTENDING DOWN TO A PRODUCING ZONE; A FREE PISTON CONTAINING MAGNETIC MATERIAL DISPOSED TO TRAVEL WITHIN THE BORE; A SPRING ACTUATED CATCHER DISPOSED TO CATCH AND RETAIN THE PISTON IN THE LUBRICATOR; PNEUMATIC PRESSURE RESPONSIVE MEANS FOR OVERCOMING SPRING PRESSURE ON THE CATCHER TO MOVE IT TO RELEASE THE FREE PISTON; AN OUTLET LINE LEADING FROM THE BORE; A PNEUMATIC PRESSURE RESPONSIVE VALVE DISPOSED TO OPEN AND CLOSE THE OUTLET LINE; A NORMALLY RETRACTED MOVABLE MAGNET DISPOSED AT A SIDE OF THE NON-MAGNETIC SECTION OF THE LUBRICATOR IN A POSITON TO BE MOVED BY ATTRACTION TOWARD THE FREE PISTON WHEN THE PISTON IS IN THE LUBRICATOR; AND MEANS, COMPRISING A VALVE ACTUATED BY MOVEMENT OF THE MAGNET, FOR BLEEDING PNEUMATIC PRESSURE FROM THE PNEUMATIC PRESSURE RESPONSIVE MEANS FOR RELEASING THE CATCHER TO MOVE TO FREE PISTON CATCHING POSITION AND FROM THE PNEUMATIC PRESSURE RESPONSIVE VALVE.
Claim 2
Dependent Claim
181 words
A FREE PISTON PUMPING SYSTEM COMPRISING IN A COMBINATION A WELLHEAD; A LUBRICATOR HAVING A SECTION MADE OF NON-MAGNETIC MATERIAL SUPERIMPOSED ON THE WELLHEAD; A PRODUCTION LINE HAVING A BORE COMMON TO THAT OF THE LUBRICATOR EXTENDING DOWN TO A PRODUCING ZONE; A FREE PISTON CONTAINING MAGNETIC MATERIAL DISPOSED TO TRAVEL WITHIN THE BORE; A SPRING ACTUATED CATCHER DISPOSED TO CATCH AND RETAIN THE PISTON IN THE LUBRICATOR; PNEUMATIC PRESSURE RESPONSIVE MEANS FOR OVERCOMING SPRING PRESSURE ON THE CATCHER TO MOVE IT TO RELEASE THE FREE PISTON; AN OUTLET LINE LEADING FROM THE BORE; A PNEUMATIC PRESSURE RESPONSIVE VALVE DISPOSED TO OPEN AND CLOSE THE OUTLET LINE; A NORMALLY RETRACTED MOVABLE MAGNET DISPOSED AT A SIDE OF THE NON-MAGNETIC SECTION OF THE LUBRICATOR IN A POSITON TO BE MOVED BY ATTRACTION TOWARD THE FREE PISTON WHEN THE PISTON IS IN THE LUBRICATOR; AND MEANS, COMPRISING A VALVE ACTUATED BY MOVEMENT OF THE MAGNET, FOR BLEEDING PNEUMATIC PRESSURE FROM THE PNEUMATIC PRESSURE RESPONSIVE MEANS FOR RELEASING THE CATCHER TO MOVE TO FREE PISTON CATCHING POSITION AND FROM THE PNEUMATIC PRESSURE RESPONSIVE VALVE.
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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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |