Oil-well-pump driving hydraulic system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 10, 2017
Grant Date -
Aug 27, 2015
app pub date -
Mar 14, 2013
filing date -
Mar 14, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In an oil-well-pump driving hydraulic system capable of avoiding occurrence of cavitation, at least a bidirectional variable displacement piston pump, a discharge rate detection portion, a discharge pressure detection portion, and a proportional solenoid control valve are contained as a single unit structure in a same housing as a pump body. The pump body includes: a connection portion provided on a side surface of the housing and to which a pump discharge passage of an external pilot hydraulic circuit is connected; and a second pilot passage that introduces an external pilot pressure from the connection portion to a pilot passage between the discharge passage of the piston pump and the proportional solenoid control valve.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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