Search International and National Patent Collections

1. (WO2017172746) PROPORTIONAL SEQUENCE VALVE WITH PRESSURE AMPLIFICATION DEVICE

Pub. No.:    WO/2017/172746    International Application No.:    PCT/US2017/024510
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Wed Mar 29 01:59:59 CEST 2017
IPC: F16K 11/07
F15B 13/04
F15B 13/042
Applicants: PARKER-HANNIFIN CORPORATION
Inventors: HARSIA, Jarmo Antero
FRANZONI, Germano
Title: PROPORTIONAL SEQUENCE VALVE WITH PRESSURE AMPLIFICATION DEVICE
Abstract:
A valve member having a supply pressure and a method of controlling the supply pressure in the valve member includes a valve body having a fluid inlet, a fluid outlet, and a controlled port. The valve member includes a spool moveable within the valve body to fluidly connect at least one of the fluid inlet and the fluid outlet with the controlled port. The spool includes an end in fluid communication with a control pressure port and a pin received within the end of the spool that is moveable relative to the spool. Fluid flow through the control pressure port acts against a cross-sectional area of the pin and an annular area of the spool to modulate the supply pressure through the valve member.