US3302582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic pump
Assignee: Eberspaecher Climate Control Systems GmbH and Co KG
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Filing: 1965-03-15
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Granted: 1967-02-07
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Kofink Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:57
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/04; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/126; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/142; F01; F01M; F01M1/00; F01M1/02; F01M2001/0207; F01M2001/0223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PISTON PUMP, PARTICULARLY FOR PUMING FUEL FOR OIL FURNACES, COMPRISING MEANS DEFINING A CYLINDER, A HOLLOW PISTON RECIPROCABLE IN SAID CYLINDER, THE BORE OF SAID PISTON DEFINING A PASSAGE FOR THE FLOW OF FLUID THERETHROUGH, AN ARMATURE CONNECTED TO SAID PISTON, SAID PISTON HAVING A PISTON ROD PORTION OF NON-MAGNETIC MATERIAL AT LEAST IN THE RANGE OF SAID ARMATURE, A MAGNET COIL AROUND SAID CYLINDER AND ADJACENT SAID ARMATURE, DISCHARGE CONDUIT AND VALVE MEANS CONNECTED TO SAID CYLINDER, AND INLET CONDUIT AND VALVE MEANS CONNECTED TO SAID CYLINDER INCLUDING MEANS DEFINING A CONCENTRIC ANNULAR SLOT IN SAID CYLINDER WHICH IS IN COMMUNICATION ON THE SUCTION SIDE OF SAID CYLINDER THROUGH THE BORE OF SAID PISTON.
Claim 2
Dependent Claim
116 words
A PISTON PUMP, PARTICULARLY FOR PUMING FUEL FOR OIL FURNACES, COMPRISING MEANS DEFINING A CYLINDER, A HOLLOW PISTON RECIPROCABLE IN SAID CYLINDER, THE BORE OF SAID PISTON DEFINING A PASSAGE FOR THE FLOW OF FLUID THERETHROUGH, AN ARMATURE CONNECTED TO SAID PISTON, SAID PISTON HAVING A PISTON ROD PORTION OF NON-MAGNETIC MATERIAL AT LEAST IN THE RANGE OF SAID ARMATURE, A MAGNET COIL AROUND SAID CYLINDER AND ADJACENT SAID ARMATURE, DISCHARGE CONDUIT AND VALVE MEANS CONNECTED TO SAID CYLINDER, AND INLET CONDUIT AND VALVE MEANS CONNECTED TO SAID CYLINDER INCLUDING MEANS DEFINING A CONCENTRIC ANNULAR SLOT IN SAID CYLINDER WHICH IS IN COMMUNICATION ON THE SUCTION SIDE OF SAID CYLINDER THROUGH THE BORE OF SAID PISTON.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |