VALVE UNIT AND VALVE EQUIPMENT
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Feb 1, 2024
app pub date -
Dec 13, 2021
filing date -
Dec 18, 2020
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A valve unit according to one embodiment includes valve equipment and control circuitry. The valve equipment includes a spool valve and a poppet-type logic valve. The spool valve switches a direction of supply and discharge of hydraulic oil to and from a hydraulic actuator. The logic valve is located between the spool valve and a hydraulic pump. The control circuitry controls the spool valve and the logic valve, such that if a supply flow rate of the hydraulic oil to the hydraulic actuator is less than a predetermined value, an opening area of a meter-in passage of the spool valve is less than an opening area of the logic valve, whereas if the supply flow rate of the hydraulic oil to the hydraulic actuator is greater than the predetermined value, the opening area of the meter-in passage of the spool valve is greater than the opening area of the logic valve.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully