US3606241A
Expired / Lapsed
US
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Hydraulically damped magnetic valve
Assignee: Danfoss AS
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Filing: 1969-06-03
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Granted: 1971-09-20
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Expires: 1989-06-03
Abstract
Abstract THE INVENTION RELATES TO A HYDRAULICALLY DAMPED MAGNETIC VALVE HAVING AN OIL CHAMBER IN WHICH THE ARMATURE AND COIL ARE ENCLOSED. THE OIL CHAMBER IS FORMED BY DIAPHRAGMS ATTACHED TO THE VALVE SPINDLE, AT OPPOSITE ENDS OF THE ARMATURE, AND TO THE INTERIOR WALL OF THE HOUSING. TWO GAS CHAMBERS ARE FORMED INTERIORLY OF THE HOUSING ON OPPOSITE SIDES OF THE OIL CHAMBER. A PASSAGE IS FORMED IN THE VALVE SPINDLE WHICH EXTENDS FROM THE VALVE CHAMBER TO ONE OF THE GAS CHAMBERS TO EFFECT BALANCING WHICH IS CONCOMITANT WITH LOW CLOSING SPRING FORCES.
Inventors
- 👤 Siegfred Bornholdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:12
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0686; F16K31/0693; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/088; H01F7/16; H01F7/1607
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |