Invention Grant
- Patent Title: Directional control valve
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Application No.: US15594772Application Date: 2017-05-15
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Publication No.: US10590962B2Publication Date: 2020-03-17
- Inventor: Gregory Thomas Coolidge , Brian Slattery , Kurt Boey
- Applicant: Parker-Hannifin Corporation
- Applicant Address: US OH Cleveland
- Assignee: Parker-Hannifin Corporation
- Current Assignee: Parker-Hannifin Corporation
- Current Assignee Address: US OH Cleveland
- Agency: McDonnell Boehnen Hulbert & Berghoff LLP
- Main IPC: F15B13/04
- IPC: F15B13/04 ; F15B11/05 ; F16K31/04 ; F16K31/122 ; F16K11/10 ; F16K11/22 ; F16K11/16 ; F16K31/12

Abstract:
An example valve section includes: a valve body configured to be fluidly coupled to the source and the actuator; a spool movable in the valve body intermediate the source and the actuator; a pressure compensator valve disposed upstream from the spool and configured to regulate flow received from the source, where the valve body defines (i) a first passage disposed upstream from the spool and configured to fluidly couple the pressure compensator valve to the spool, and (ii) a second passage disposed downstream from the spool and configured to fluidly couple the spool to the actuator; and a counterbalance valve disposed in the second passage downstream from the spool, where the counterbalance valve is opened to permit flow therethrough from the actuator to the spool in response to a pilot pressure derived from the first passage when the spool is shifted from a neutral position.
Public/Granted literature
- US20170328380A1 Directional Control Valve Public/Granted day:2017-11-16
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