US3267866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic oscillating-armature piston pump
Assignee: Individual
•
Filing: 1964-08-25
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Granted: 1966-08-23
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Unger Ladislaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:12
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN AN ELECTROMAGNETIC PISTON PUMP, A CYLINDER HAVING AN INLET CONNECTION AT ITS FIRST END AND AN OUTLET CONNECTION AT ITS SECOND END, A PISTON OF MAGNETIC MATERIAL SLIDABLY FITTING SAID CYLINDER AND HAVING AN AXIAL PASSAGEWAY FOR FLUID, A SUCTION VALVE IN SAID INLET CONNECTION AND SPRING-URGED TO CLOSED POSITION, A PRESSURE VALVE CARRIED BY SAID PISTON AT THE END THEREOF NEAREAST SAID SUCTION VALVE AND SPRING-URGED TO CLOSED POSITION, A SPRING IN SAID CYLINDER BETWEEN THE SECOND END THEREOF AND SAID PISTON, AND URGING THE LATTER TOWARD SAID FIRST END OF SAID CYLINDER, AND ELECTROMAGNETIC MEANS COMPRISING A SOLENOID SURROUNDING SAID CYLINDER, SAID PISTON FORMING THE ARMATURE FOR SAID ELECTROMAGNET, SAID SPRING BEING A COIL SPRING COMPRESSED BY MOTION OF SAID PISTON IN A SUCTION STROKE,
Claim 2
Dependent Claim
128 words
IN AN ELECTROMAGNETIC PISTON PUMP, A CYLINDER HAVING AN INLET CONNECTION AT ITS FIRST END AND AN OUTLET CONNECTION AT ITS SECOND END, A PISTON OF MAGNETIC MATERIAL SLIDABLY FITTING SAID CYLINDER AND HAVING AN AXIAL PASSAGEWAY FOR FLUID, A SUCTION VALVE IN SAID INLET CONNECTION AND SPRING-URGED TO CLOSED POSITION, A PRESSURE VALVE CARRIED BY SAID PISTON AT THE END THEREOF NEAREAST SAID SUCTION VALVE AND SPRING-URGED TO CLOSED POSITION, A SPRING IN SAID CYLINDER BETWEEN THE SECOND END THEREOF AND SAID PISTON, AND URGING THE LATTER TOWARD SAID FIRST END OF SAID CYLINDER, AND ELECTROMAGNETIC MEANS COMPRISING A SOLENOID SURROUNDING SAID CYLINDER, SAID PISTON FORMING THE ARMATURE FOR SAID ELECTROMAGNET, SAID SPRING BEING A COIL SPRING COMPRESSED BY MOTION OF SAID PISTON IN A SUCTION STROKE,
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |