Patent US4949066A successfully refreshed from Google Patents.
US4949066A
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Circuit arrangement for transmitting a supply voltage and a control signal
Assignee: Bosch Rexroth AG
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Filing: 1988-05-09
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Granted: 1990-08-14
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Expires: 2008-05-09
Abstract
Abstract With the invention a supply voltage and a control signal are to be supplied via a two-conductor cable to the power stage of a solenoid valve. For this purpose pulse-width modulation is employed, i.e. in a microcomputer the adjusting signal is converted directly as pulse-width-modulated signal via a power stage to an AC voltage. The control signal is obtained from the pulse width in the power stage.
Inventors
- 👤 Peter Reinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:03
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
Circuit arrangement for transmitting a supply voltage and a control signal via a cable to a power stage for driving a solenoid valve, characterized by a changeover contact in said circuit for switching the polarity of the DC supply voltage alternately between two conductors of said cable to create pulses, the duration of said pulses being modulated in dependence upon the adjusting value of said control signal, and said power stage including a full-bridge rectifier for reestablishing the DC supply voltage from said pulses and a desired value generator for reestablishing the control signal in response to the duration of said pulses.
Claim 2
Dependent Claim
102 words
Circuit arrangement for transmitting a supply voltage and a control signal via a cable to a power stage for driving a solenoid valve, characterized by a changeover contact in said circuit for switching the polarity of the DC supply voltage alternately between two conductors of said cable to create pulses, the duration of said pulses being modulated in dependence upon the adjusting value of said control signal, and said power stage including a full-bridge rectifier for reestablishing the DC supply voltage from said pulses and a desired value generator for reestablishing the control signal in response to the duration of said pulses.
Claim 3
Dependent Claim
18 words
Circuit arrangement according to claim 1, characterized in that the desired value generator consists of a low-pass filter.
Claim 4
Dependent Claim
22 words
Circuit arrangement according to claim 1, characterized in that the desired value generator consists of a timing member measuring the pulse duration.
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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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |