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1. (WO2018125321) VALVE WITH GRADUAL FLOW AREA CHANGES

Pub. No.:    WO/2018/125321    International Application No.:    PCT/US2017/051300
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Thu Sep 14 01:59:59 CEST 2017
IPC: F16K 11/07
F16K 31/06
Applicants: PARKER-HANNIFIN CORPORATION
Inventors: MORGAN, Aaron, Michael
KASHID, Bipin
SEIDEL, Charlie
Title: VALVE WITH GRADUAL FLOW AREA CHANGES
Abstract:
An example valve includes: (i) a valve body defining a longitudinal cavity, where the valve body includes a supply inlet and an operating outlet; (ii) a cage disposed in the longitudinal cavity, where the cage includes (a) a first opening fluidly coupled to the supply outlet, and (b) a second opening fluidly coupled to the operating outlet; and (iii) a spool mounted within the cage and configured to move axially therein. When the valve is actuated, the spool moves within the cage to form a gap, thereby allowing pressurized fluid to flow from the supply inlet through the first opening, the gap, and the second opening to the operating outlet. A flow area defined around an exterior peripheral surface of the spool changes upstream from the gap at a first rate, and changes downstream from the gap at a second rate that is different from the first rate.