Work machine
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
-
Feb 18, 2025
Grant Date -
Sep 8, 2022
app pub date -
Sep 2, 2020
filing date -
Sep 2, 2020
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Non-US Coverage
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Abstract
A work machine includes: a controller; a first electrical circuit provided with a first power supply that supplies power to the controller; an electric drive source necessary for operating the work machine; and a second electrical circuit provided with a second power supply that supplies power to the electric drive source. The work machine further includes: a capacitor provided to the second electrical circuit; a first precharge device that performs precharge of the capacitor by using power of the first power supply; and a second precharge device that performs precharge of the capacitor by using power of the second power supply. The controller performs precharge by using one of the precharge devices when it is determined that precharge by using the other one of the precharge devices is impossible.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- HITACHI CONSTRUCTION MACHINERY CO., LTD.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Imai, Yusuke | Arakawa-ku, JP | 62 | 195 |
# of filed Patents : 62 Total Citations : 195 | |||
Ota, Yasunori | Tsuchiura, JP | 19 | 248 |
# of filed Patents : 19 Total Citations : 248 | |||
Watanabe, Akira | Ushiku, JP | 324 | 4667 |
# of filed Patents : 324 Total Citations : 4667 | |||
Yano, Manabu | Nagareyama, JP | 16 | 178 |
# of filed Patents : 16 Total Citations : 178 |
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- < 1 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Aug 18, 2028 |
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 18, 2032 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 18, 2036 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
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 |
Full Text

Legal Events
Date | Code | Event | Description |
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Jul 24, 2024 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 12 |
Jul 23, 2020 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8 |
Jul 21, 2016 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Feb 05, 2013 | I | Issuance | |
Jan 16, 2013 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Aug 26, 2010 | P | Published | |
May 22, 2009 | AS | ASSIGNMENT | free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTY FROM CHEVRON CORPORATION TO CHEVRON U.S.A. INC. PREVIOUSLY RECORDED ON REEL 022318 FRAME 0733. ASSIGNOR(S) HEREBY CONFIRMS THE DO HEREBY SELL, ASSIGN, TRANSFER AND SET OVER UNTO SAID CHEVRON U.S.A. INC;ASSIGNOR:MILLER, STEPHEN J.;REEL/FRAME:029746/0934 Owner name: CHEVRON U.S.A. INC., CALIFORNIA Effective Date: May 22, 2009 |
May 22, 2009 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MILLER, STEPHEN J.;REEL/FRAME:022776/0927 Owner name: CHEVRON CORPORATION, CALIFORNIA Effective Date: May 22, 2009 |
Feb 26, 2009 | F | Filing | |
Feb 26, 2009 | PD | Priority Date | |
Feb 13, 2009 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MILLER, STEPHEN J.;REEL/FRAME:022318/0733 Owner name: CHEVRON CORPORATION, CALIFORNIA Effective Date: Feb 13, 2009 |

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