Construction machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 28, 2017
Grant Date -
Dec 10, 2015
app pub date -
May 21, 2015
filing date -
Jun 9, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A construction machine is provided which is capable of warming up without an additional hydraulic device. A hydraulic excavator includes a cooling oil line connected to an arm control valve for leading hydraulic oil discharged from the arm control valve to a tank through an oil cooler when the arm control valve is shifted to an extension position, and a non-cooling oil line connected to the arm control valve for leading hydraulic fluid discharged from the arm control valve to the tank running away from the oil cooler when the arm control valve is shifted to a neutral position. The arm control valve includes a guide passage provided at the neutral position for leading hydraulic fluid discharged from a hydraulic pump to the non-cooling oil line.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2015 Application Filing Year
- E02F Class
- 670 Applications Filed
- 557 Patents Issued To-Date
- 83.14 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- E02F Class
- 21.52 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 28, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 28, 2029 |
