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1. (WO2018178661) SHUTTLE VALVE

Pub. No.:    WO/2018/178661    International Application No.:    PCT/GB2018/050811
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Mar 29 01:59:59 CEST 2018
IPC: B01D 53/04
F16K 3/26
F16K 3/34
F16K 11/04
Applicants: PARKER HANNIFIN MANUFACTURING LIMITED
Inventors: GRAHAM, Michael
Title: SHUTTLE VALVE
Abstract:
A shuttle valve module assembly for fitting in a cavity (220) in a valve housing is disclosed, for controlling the flow of fluid between one of first (154) and second (156) primary housing ports and a secondary housing port (158). The assembly comprises: a shuttle valve module (2) having first (18) and second (10) end walls and a side wall, and an elongate chamber extending between the end walls, the end walls and the side wall having first (16), second (8) and third (1 1) openings which can communicate with first (154), second (156) and third (158) ports respectively in the valve housing; a seal member (36) which can move within the chamber between a first position in which it forms a seal which prevents flow of fluid between the first and third openings while allowing flow between the second and third openings, and a second position in which it forms a seal which prevents flow of fluid between the second and third openings while allowing flow of fluid between the first and third openings; and a wedging member (30). The module also comprises a body (4) and an end cap (6) which provides the end wall (18) of the module. The body and the end cap are arranged so that one can slide relative to the other telescopically, and so that the wedging member can be inserted between the body and the end cap to cause the end cap to be displaced relative to the body so as to increase the distance between the first and second end walls of the module.