Spool valve
AssigneeEaton Intelligent Power Limited
InventorsPeter Maria Lauer, Rahul Navale
Life of this patent
Estimating the term…
Abstract
A valve includes a bore within a valve body having a central axis. A plurality of galleries in the bore define flow paths for hydraulic fluid. A spool is positioned in the bore, and the spool is moveable along the central axis between a first position in which hydraulic fluid from a central pump gallery is prevented from flowing to first and second working galleries and from flowing to one or more tank galleries; a second position in which hydraulic fluid from the central pump gallery is in fluid communication with both the first and second working galleries simultaneously; and a third position in which the first and second working galleries are in fluid communication with the one or more tank galleries simultaneously.
Claims19
A valve comprising:
- a body defining a bore having a central axis and first and second work galleries defined by a plurality of walls;
- and
- a spool positioned within the bore, the spool having:
- a central body portion having a central body portion diameter;
- and
- a central sealing land positioned between first and second outside sealing lands on the central body portion, each sealing land has a sealing land diameter larger than the central body portion diameter;
- wherein a first sealing relationship between the spool and the bore allows fluid to flow from a central pump gallery into both the first and second work galleries simultaneously.
A valve comprising:
- a bore within a valve body having a central axis;
- a plurality of galleries in the bore that define flow paths for hydraulic fluid;
- and
- a spool positioned in the bore;
- wherein the spool is moveable along the central axis between:
- a first position in which hydraulic fluid from a central pump gallery is prevented from flowing to first and second working galleries and from flowing to one or more tank galleries;
- a second position in which hydraulic fluid from the central pump gallery is in fluid communication with both the first and second working galleries simultaneously;
- and
- a third position in which the first and second working galleries are in fluid communication with the one or more tank galleries simultaneously.
Dependencies are inferred from the claim text.