Unidirectional damping system

Patent metadata

Field	Value
Publication number	US-11111980-B1
Application number	US-202117217823-A
Country	US
Kind code	B1
Filing date	Mar 30, 2021
Priority date	Mar 30, 2021
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A unidirectional damping system includes a shaft and unidirectional damping modules. Each module is fixedly coupled to the shaft. Each module includes a fluid-filled variable-volume chamber and spring(s). The chamber has at least one port through which fluid flows based on changes in volume of the chamber wherein, when the shaft is adapted to have a unidirectional force applied thereto, the chamber decreases in volume. The spring(s) is coupled to the chamber for increasing volume of the chamber when the unidirectional force is not applied to the shaft. A fluid-filled spacer chamber is coupled between adjacent modules and is uncoupled from the shaft. The spacer chamber includes at least one venting port through which fluid flows based on pressure in the spacer chamber.

First claim

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A unidirectional damping system, comprising:
a shaft;
a plurality of unidirectional damping modules, each of said modules fixedly coupled to said shaft at a unique longitudinal location thereof, each of said modules including
a fluid-filled variable-volume chamber including at least one port through which fluid flows based on changes in volume of said chamber wherein, when said shaft is adapted to have a unidirectional force applied thereto, said chamber decreases in volume, and
at least one spring coupled to said chamber for increasing volume of said chamber when the unidirectional force is not applied to said shaft; and
a fluid-filled spacer chamber coupled between adjacent ones of said modules and uncoupled from said shaft, said spacer chamber including at least one venting port through which fluid flows based on pressure in said spacer chamber.

2. A system as in claim 1 , further comprising a valve disposed in each said port of said chamber and said venting port of said spacer chamber.

3. A system as in claim 1 , wherein said shaft is centrally disposed in each of said modules.

4. A system as in claim 1 , wherein each of said modules and each said spacer chamber are disposed annularly about said shaft.

5. A system as in claim 1 , wherein each said chamber includes flexible side walls.

6. A system as in claim 1 , wherein a fluid filling said chamber and said spacer chamber comprises a gas.

7. A unidirectional damping system, comprising:
a rigid housing;
a shaft disposed in said housing and extending on one end thereof from said housing, said one end adapted to be coupled to a structure subject to movement;
a plurality of unidirectional damping modules disposed in said housing, each of said modules fixedly coupled to said shaft at a unique longitudinal location thereof, each of said modules including
a rigid plate fixed to said shaft at said unique longitudinal location associated with one of said modules,
a fluid-filled variable-volume chamber coupled to said plate, said chamber including at least one port through which fluid flows based on changes in volume of said first chamber wherein, when said shaft is adapted to have a unidirectional force applied thereto, said chamber decreases in volume, and
a plurality of springs coupled to and disposed within said chamber for increasing volume of said chamber when the unidirectional force is not applied to said shaft;
said housing defining a fixed-volume spacing chamber between adjacent ones of said modules; and
a breather valve disposed in said housing and in fluid communication with each said spacing chamber.

8. A system as in claim 7 , further comprising a valve disposed in each said port of said chamber.

9. A system as in claim 7 , wherein said shaft is centrally disposed in each of said modules.

10. A system as in claim 7 , wherein each of said modules and each said spacing chamber is disposed annularly about said shaft.

11. A system as in claim 7 , wherein each said chamber includes flexible side walls.

12. A system as in claim 7 , wherein a fluid filling said chamber comprises a gas.

13. A unidirectional damping system, comprising:
a shaft;
a plurality of unidirectional damping modules, each of said modules disposed annularly about said shaft wherein said shaft is centrally disposed in each of said modules, each of said modules fixedly coupled to said shaft at a unique longitudinal location thereof, each of said modules including
a rigid plate fixed to said shaft at said unique longitudinal location associated with one of said modules,
a fluid-filled variable-volume chamber including at least one port through which fluid flows based on changes in volume of said chamber wherein, when said shaft is adapted to have a unidirectional force applied thereto, said chamber decreases in volume, and
at least one spring coupled to and disposed within said chamber for increasing volume of said chamber when the unidirectional force is not applied to said shaft; and
a fluid-filled spacer chamber coupled between adjacent ones of said modules and uncoupled from said shaft, said spacer chamber including at least one venting port through which fluid flows based on pressure in said spacer chamber.

14. A system as in claim 13 , further comprising a valve disposed in each said port of said chamber and said venting port of said spacer chamber.

15. A system as in claim 13 , wherein each said chamber includes flexible side walls.

16. A system as in claim 13 , wherein a fluid filling said chamber and said spacer chamber comprises a gas.

Assignees

• Nasa

Inventors

• Myers W Neill
• Berry Robert E
• Gant Frederick Scott
• Lindner Jeffrey Lee
• Townsend John S

Classifications

• F16F2230/32

  Modular design · CPC title

• F16F2222/12

  Fluid damping · CPC title

• F16F15/023

  using fluid means · CPC title

• F16F9/10

  using liquid only; using a fluid of which the nature is immaterial · CPC title

• F16F9/0472 Primary

  characterised by comprising a damping device (with plastic deformation of members F16F7/12; delay devices or arrangements F15B21/10) · CPC title