Servicing procedure for single-stage mixed fluid/gas shock strut

Patent metadata

Field	Value
Publication number	US-10670102-B2
Application number	US-201816002917-A
Country	US
Kind code	B2
Filing date	Jun 7, 2018
Priority date	Nov 6, 2015
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

Methods for servicing shock struts are provided. In various embodiments, a method for servicing a shock strut may comprise deflating the shock strut; compressing the shock strut until the shock strut is in a fully compressed position; and charging the shock strut with a liquid until a pressure of the liquid decreases a volume of a residual air located inside of the shock strut. In various embodiments, charging the shock strut with liquid under pressure may reduce the volume of trapped air inside of the shock strut to a negligible volume, eliminating the servicing variations.

First claim

What is claimed is:

1. A method for servicing a shock strut comprising:
deflating the shock strut;
compressing the shock strut until the shock strut is in a fully compressed position;
with the shock strut in the fully compressed position, charging the shock strut with a liquid until a pressure of the liquid decreases a volume of a residual air located inside of the shock strut; and
with the shock strut in the fully compressed position, discharging a pre-determined volume of liquid from the shock strut.

2. The method of claim 1 , further comprising charging the shock strut with a gas.

3. The method of claim 1 , wherein the shock strut includes a first valve and a second valve.

4. The method of claim 1 , wherein the compressing is performed via at least one of a jack or a weight of a vehicle, the vehicle supported at least in part by the shock strut.

Assignees

• Goodrich Corp

Inventors

• Fazeli Amir
• Cepic Adnan
• Reber Susanne

Classifications

• H05K999/99

  Electricity · mapped topic

• F16F9/3271 Primary

  Assembly or repair · CPC title

• B64C25/60

  Oleo legs · CPC title

• F16F9/06

  using both gas and liquid {(F16F9/486 take precedence; self-pumping fluid springs B60G17/044)} · CPC title

• B64C25/58

  Arrangements or adaptations of shock-absorbers or springs (shimmy-dampers B64C25/50) · CPC title