Patent US4458289A successfully refreshed from Google Patents.
US4458289A
Expired / Lapsed
US
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Solenoid drive for valves
Assignee: Bosch Rexroth AG
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Filing: 1982-11-22
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Granted: 1984-07-03
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Expires: 2002-11-22
Abstract
Abstract An adjustable resistance circuitry is connected in parallel to the coil of a solenoid to adjust the actuating force of a magnetic drive means for valves.
Inventors
- 👤 Wolfgang Lukasczyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:39
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/18; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
A solenoid for valves, comprising an electrical coil and an armature of which the actuating force is proportional to the electrical input signal being supplied to the coil, and further comprising an alignment means to finely adjusting the actuating force of said armature, characterized in that the alignment means comprises an electrical resistance circuit which is connected in parallel to said coil.
Claim 2
Dependent Claim
62 words
A solenoid for valves, comprising an electrical coil and an armature of which the actuating force is proportional to the electrical input signal being supplied to the coil, and further comprising an alignment means to finely adjusting the actuating force of said armature, characterized in that the alignment means comprises an electrical resistance circuit which is connected in parallel to said coil.
Claim 3
Dependent Claim
16 words
The coil of claim 1 characterized in that the resistance circuit consists of a single resistor.
Claim 4
Dependent Claim
52 words
The solenoid of claim 1 characterized in that the resistance circuit comprises a transistor being connected in series with at least a resistor, which transistor is controlled by a potentiometer to which a voltage is supplied which is proportional to the voltage drop occuring in the current path of the solenoid coil.
Claim 5
Dependent Claim
19 words
The solenoid of claim 3 characterized in that the potentiometer is connected to a tap of the solenoid coil.
Claim 6
Dependent Claim
19 words
The solenoid of claim 1 characterized in that the resistance circuit is mounted in the casing of the solenoid.
Claim 7
Dependent Claim
25 words
The solenoid of claim 1 characterized in that the resistance circuit is mounted in a plastic socket receiving the electrical terminals of the solenoid coil.
Claim 8
Dependent Claim
18 words
The solenoid according to claim 1 characterized in that the resistance circuit is mounted on an electrical board.
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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |