Patent ID: 8567758
Filing Date: 2013-10-29
Classification: F15B,F16K

Abstract:
1. A valve comprising: a valve body comprising a bore comprising an axis, a first passage open to the bore, and a second passage open to the bore; a valve spool comprising a first end and a second end, the valve spool at least partially positioned within the bore of the valve body and slidable along the axis of the bore, the valve spool comprising a first sealing member, a second sealing member, and a third sealing member, the sealing members each being in sealing contact with the bore, the valve spool comprising a first reduced-section region positioned between the first end of the valve spool and the first sealing member, a second reduced-section region positioned between the first sealing member and the second sealing member, and a third reduced-section region positioned between the third sealing member and the second end of the valve spool, wherein the valve spool comprises a first detent groove located at the first end and a second detent groove located at the second end, wherein the valve body comprises a first detent member holder located at a first end thereof and a second detent member holder located at a second end thereof, wherein a first detent member and a second detent member are located in the first and second detent member holders respectively, wherein the first detent member is configured to engage the first detent groove when the valve spool is in an open position, wherein the second detent member is configured to engage the second detent groove when the valve spool is in closed position, wherein each of the first detent member and the second detent member comprises at least one ball that engages the first detent groove and the second detent groove respectively, wherein at least one of the first detent member holder and the second detent member holder comprises a sealable opening, and wherein the sealable opening is configured to change a volume of a second fluid in a first chamber and a third chamber; the first chamber comprised at least in part between the bore of the valve body and the first reduced-section region of the valve spool; a second chamber comprised at least in part between the bore of the valve body and the second reduced-section region of the valve spool; the third chamber comprised at least in part between the bore of the valve body and the third reduced-section region of the valve spool; a third passage open to the first chamber and the third chamber; a valve actuator arrangement adapted to apply a first momentary load on the valve spool to move the valve spool to a closed position and adapted to apply a second momentary load on the valve spool to move the valve spool to an open position; and a first magnetic element and a second magnetic element, wherein the first magnetic element is mounted adjacent the first end of the valve spool and the second magnetic element is mounted adjacent the second end of the valve spool, wherein the magnetic elements comprise grooves to allow the second fluid to pass across the magnetic elements, the grooves being sized for the fluid and configured to customize a control time in response to a dynamic behavior property; wherein when the valve spool is at the open position the first passage and the second passage are both open to the second chamber thereby allowing a first fluid to pass between the first passage and the second passage; wherein when the valve spool is at the closed position the valve spool forms a barrier between the first passage and the second passage and thereby substantially prevents the first fluid from passing between the first passage and the second passage; and wherein the second fluid is transferred between the first chamber and the third chamber via the third passage when the valve spool is moved between the open position and the closed position.