Main hoist system of rotary drilling rig, and control method therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 17, 2024
Grant Date -
Aug 31, 2023
app pub date -
Dec 3, 2020
filing date -
May 12, 2020
priority date (Note) -
In Force
status (Latency Note)
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Importance

US Family Size
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Non-US Coverage
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Abstract
A main winch system of a rotary drilling rig includes a main action loop, a pilot control loop, and a feedback control loop. The main action loop includes an engine, a hydraulic pump, a main control valve, a balance valve, a main winch motor, and an oil tank. The pilot control loop includes a pilot handle, a solenoid valve I, a pressure relay, and the main control valve in the main action loop. The feedback control loop includes a solenoid valve II and the hydraulic pump and the main control valve in the main action loop. In response to a lifting action of the pilot handle for the main winch, under the control of a button, the solenoid valve II is energized continuously, and the solenoid valve I is energized and de-energized according to a given rule.
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)
Patent Owner | Address | |
---|---|---|
XUZHOU XUGONG FOUNDATION CONSTRUCTION MACHINERY CO LTD | NO 1 XUGONG AVENUE QINGSHANQUAN TOWN JIAWANG DISTRICT XUZHOU CITY JIANGSU PROVINCE CHINA 221300 XUZHOU CITY JIANGSU PROVINCE 221300 |
International Classification(s)

- 2020 Application Filing Year
- F15B Class
- 557 Applications Filed
- 362 Patents Issued To-Date
- 65 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Gao, Xiafang | Xuzhou, CN | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 | |||
Gao, Xing | Xuzhou, CN | 14 | 6 |
# of filed Patents : 14 Total Citations : 6 | |||
Geng, Qianbin | Xuzhou, CN | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 | |||
Liu, Zhigang | Xuzhou, CN | 111 | 1521 |
# of filed Patents : 111 Total Citations : 1521 | |||
Qiu, Hongchen | Xuzhou, CN | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 | |||
Shan, Changmeng | Xuzhou, CN | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 | |||
Shan, Junyun | Xuzhou, CN | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 | |||
Sun, Yu | Xuzhou, CN | 426 | 3781 |
# of filed Patents : 426 Total Citations : 3781 | |||
Zhang, Yonghua | Xuzhou, CN | 22 | 129 |
# of filed Patents : 22 Total Citations : 129 |
Cited Art Landscape
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Patent Citation Ranking
- 0 Citation Count
- F15B Class
- 0 % this patent is cited more than
- 1 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Mar 17, 2028 |
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 17, 2032 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 17, 2036 |
Fee | Large entity fee | small entity fee | micro entity fee |
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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 |
---|---|---|---|
Jul 26, 2023 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOE TECHNOLOGY GROUP CO., LTD.;REEL/FRAME:064397/0480 Owner name: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD., CHINA Effective Date: Jul 26, 2023 |
Jun 21, 2022 | P | Publication | |
Jun 01, 2022 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
May 24, 2022 | STPP | INFORMATION ON STATUS: PATENT APPLICATION AND GRANTING PROCEDURE IN GENERAL | free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED |
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Aug 13, 2020 | P | Published | |
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May 02, 2018 | FEPP | FEE PAYMENT PROCEDURE | free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Sep 15, 2017 | F | Filing | |
Feb 16, 2017 | PD | Priority Date |

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