Open bleed-base valve

Patent metadata

Field	Value
Publication number	US-11808323-B2
Application number	US-202117175972-A
Country	US
Kind code	B2
Filing date	Feb 15, 2021
Priority date	Feb 15, 2021
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

A damper assembly includes a pressure tube defining a first chamber and a piston movable within the first chamber. The damper assembly includes a reserve tube defining a second chamber. The damper assembly includes a cylinder end attached to the pressure tube, the cylinder end defining a passage in fluid communication with the first chamber and the second chamber. The damper assembly includes an orifice disc attached to the cylinder end and defining an opening in fluid communication with the passage. The damper assembly includes a check disc attached to the cylinder end, the check disc movable from a first position spaced from orifice disc to a second position abutting the orifice disc. Movement of the piston within the first chamber causes fluid flow between the first chamber and the second chamber via the passage of the cylinder end. The check disc and the orifice disc limit a rate of such fluid flow.

First claim

What is claimed is:

1. A damper assembly, comprising:
a pressure tube defining a first chamber;
a piston movable within the pressure tube;
a reserve tube defining a second chamber;
a cylinder end attached to the pressure tube, the cylinder end defining a passage in fluid communication with the first chamber and the second chamber;
an orifice disc attached to the cylinder end and defining an opening in fluid communication with the passage, the opening of the orifice disc extending radially outward from the passage to an outer edge of the orifice disc; and
a check disc attached to the cylinder end, the check disc movable from a first position spaced from orifice disc toward the cylinder end to a second position abutting the orifice disc; and
wherein movement of the piston within the first chamber causes fluid flow between the first chamber and the second chamber via the passage of the cylinder end, and wherein the check disc and the orifice disc limit a rate of such fluid flow.

2. The damper assembly of claim 1 , further comprising a fulcrum disc between the orifice disc and the check disc.

3. The damper assembly of claim 1 , further comprising a seat disc between the orifice disc and the cylinder end, the seat disc defining an opening in fluid communication with the passage of the cylinder end and the opening of the orifice disc.

4. The damper assembly of claim 1 , wherein the cylinder end defines a second passage in fluid communication with the first chamber and the second chamber, and further comprising a valve disc attached to the cylinder end, the valve disc selectively permitting fluid flow through the second passage in a first direction and inhibiting fluid flow through the second passage in a second direction opposite the first direction.

5. The damper assembly of claim 4 , wherein the cylinder end is between the orifice disc and the valve disc.

6. The damper assembly of claim 4 , wherein the cylinder end includes a rib extending away from a top surface of the cylinder end and surrounding the passage, the second passage, and the check disc.

7. The damper assembly of claim 6 , wherein the cylinder end includes a second rib extending away from the top surface and surrounding the passage and not the second passage.

8. The damper assembly of claim 7 , wherein the second rib is radially between the rib and the passage, and the second passage is radially between the rib and the second rib.

9. The damper assembly of claim 7 , wherein the rib extends from the top surface beyond the second rib.

10. The damper assembly of claim 6 , wherein the cylinder end includes a second rib extending away from the top surface and surrounding the rib, wherein the cylinder end defines a third passage radially between the rib and the second rib, the third passage in fluid communication with the first chamber and the second chamber, and further comprising a second valve disc attached to the cylinder end, the second valve disc selectively permitting fluid flow through the third passage in the second direction and inhibiting fluid flow through the third passage in the first direction.

11. The damper assembly of claim 10 , wherein the second valve disc defines an opening radially inward of the rib.

12. The damper assembly of claim 10 , wherein the second valve disc abuts the rib and the second rib.

13. The damper assembly of claim 1 , wherein the check disc at the second position abuts the orifice disc at the outer edge.

14. A cylinder end assembly for a damper assembly, comprising:
a cylinder end having a top surface opposite a bottom surface, the cylinder end defining a passage that extends from the top surface to the bottom surface;
an orifice disc attached to the cylinder end and defining an opening in fluid communication with the passage, the opening of the orifice disc extending radially outward from the passage to an outer edge of the orifice disc; and
a check disc attached to the cylinder end, the check disc movable from a first position spaced from orifice disc toward the cylinder end to a second position abutting the orifice disc; and
wherein the check disc and the orifice disc limit a rate of fluid flow through the passage.

15. The cylinder end assembly of claim 14 , further comprising a fulcrum disc between the orifice disc and the check disc.

16. The cylinder end assembly of claim 14 , further comprising a seat disc between the orifice disc and the cylinder end, the seat disc defining an opening in fluid communication with the passage of the cylinder end and the opening of the orifice disc.

17. The cylinder end assembly of claim 14 , wherein the cylinder end defines a second passage that extends from the top surface to the bottom surface, and further comprising a valve disc attached to the cylinder end, the valve disc selectively permitting fluid flow through the second passage in a first direction and inhibiting fluid flow through the second passage in a second direction opposite the first direction.

18. The cylinder end assembly of claim 14 , wherein the check disc at the second position abuts the orifice disc at the outer edge.

Assignees

• Driv Automotive Inc

Inventors

• Montagna Franky

Classifications

• F16F9/512 Primary

  Means responsive to load action, {i.e. static load} on the damper or {dynamic} fluid pressure {changes} in the damper, {e.g. due to changes in velocity (F16F9/504, F16F9/516 take precedence; non-automatic damper adjustment from a distance using servo control, the servo pressure being created by the flow of damping fluid F16F9/465; self-pumping fluid springs in vehicle suspensions B60G17/044)} · CPC title

• F16F9/185

  Bitubular units (where compression of gas leads to a clear spring action F16F9/062) · CPC title

• F16F9/3242

  of cylinder ends, e.g. caps · CPC title

• F16F9/348

  Throttling passages in the form of annular discs {or other plate-like elements which may or may not have a spring action}, operating in opposite directions {or singly, e.g. annular discs positioned on top of the valve or piston body (F16F9/341, F16F9/3415 take precedence)} · CPC title

• F16K15/028

  the valve member consisting only of a predominantly disc-shaped flat element · CPC title