SOLENOID VALVE DRIVE CONTROL APPARATUS AND METHOD FOR DRIVING A SOLENOID VALVE
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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N/A
Issued Date -
Sep 24, 2009
app pub date -
Feb 5, 2009
filing date -
Mar 19, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A solenoid valve drive control apparatus includes a MOSFET connected in series with the drive coil of a solenoid valve, a varistor connected in parallel with the drive coil, and a diode connected in parallel with the drive coil and the MOSFET. Due to the MOSFET being turned OFF, because the varistor immediately becomes conductive when a back EMF is generated in the drive coil, an electric current caused by the back EMF flows through a closed circuit constituted by the drive coil and the varistor.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
SMC KABUSHIKI KAISHA | 16-4 SHIMBASHI 1-CHOME MINATO-KU TOKYO 105-8659 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
ISHITSUKA, Nobuyuki | Satte-shi , JP | 6 | 123 |
# of filed Patents : 6 Total Citations : 123 | |||
Morikawa, Fumio | Misato-shi , JP | 16 | 332 |
# of filed Patents : 16 Total Citations : 332 |
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Patent Citation Ranking
- 5 Citation Count
- H01H Class
- 5.60 % this patent is cited more than
- 16 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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