Hydraulic fluid warming system and method

US10816019B2 · kind B2 · utility

Assignee

• The Boeing Company · US

Inventors

• Matthew D. Uhlman · Kirkland, US
• Barry D. Hance · Woodinville, US
• Herbert Guttler · Mukilteo, US
• Robert J. Hawk · Seattle, US
• Paul Smith · Seattle, US
• Patrick M. Fahey · Seattle, US
• Ellen A. Pifer · Seattle, US
• Christopher P. Beamis · Edmonds, US
• Ali Abdelmagid · Bellevue, US
• Patrick J. McCormick · Mukilteo, US
• Mark W. Lesyna · Louisville, US

Key dates

• Filing date: May 2, 2018
• Grant date: Oct 27, 2020
• Expiry date: Feb 26, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/6343
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic system (e.g., of an aircraft or other vehicle) includes a pump, a pressure line coupled to the pump and configured to distribute pressurized hydraulic fluid, and a return line configured to return hydraulic fluid to a reservoir. The hydraulic system also includes an auxiliary leakage valve coupled to the pressure line, to the return line, and to an actuator. The auxiliary leakage valve is configured to receive a control signal and, based on the control signal, selectively open a restricted fluid path. The restricted fluid path couples the pressure line to the return line to allow a restricted amount of the hydraulic fluid to flow from the pressure line to the return line.