David Mc Clay

US Patent:

50883836, Feb 18, 1992

Filed:

Jan 22, 1990

Appl. No.:

7/468353

Inventors:

John W. Wardle - Roscoe IL
Plato J. Leeson - Rockford IL
David G. Clay - Rockford IL
Dale W. Sievert - Freeport IL

Assignee:

Woodward Governor Company - Rockford IL

International Classification:

F15B 907
F15B 909

US Classification:

91361

Abstract:

A multiplexed hydraulic control system which avoids the use of a rotary multiplexer and thereby allows for random selection of the multiplexed outlet ports and variable dwell times for the respective ports. A single hydraulic input is multiplexed among a plurality of hydraulic outputs. A control system provides two types of signals: (1) modulation signals selected from a plurality of multiplexed input signals for producing a modulating hydraulic flow, and (2) selector signals for operating on the multiplexer means to route the modulated signal to the appropriately selected channel.