Hydraulic damper having a pressure tube and a ring

Patent metadata

Field	Value
Publication number	US-12460694-B2
Application number	US-202217880208-A
Country	US
Kind code	B2
Filing date	Aug 3, 2022
Priority date	Aug 3, 2022
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A ring circumscribing a moveable rod of a hydraulic damper. The movable rod defining an axis. The ring comprising a first wall, a second wall, an inner wall, an outer wall and a fluid passage. The fluid passage comprising a first channel extending radially along the second wall from the inner wall, with respect to the axis The fluid passage further comprising a second channel.

First claim

What is claimed is:

1 . A ring circumscribing a moveable rod of a hydraulic damper, the moveable rod defining an axis, the ring comprising:
a first wall; a second wall, axially spaced from the first wall, with respect to the axis; an inner wall extending circumferentially about the axis and confronting the moveable rod and extending between the first wall and the second wall; an outer wall extending circumferentially about the axis, the outer wall circumscribing the inner wall and extending between the first wall and the second wall; and a fluid passage comprising:
a first channel extending radially along the second wall and from the inner wall, with respect to the axis; and
a second channel at least partially overlapping a portion of the first channel and extending axially along a portion of the outer wall and from the second wall, with respect to the axis;
wherein the second channel includes a cross-sectional area when viewed along a vertical plane extending along the axis and intersecting the second channel, the cross-sectional area including a first linear portion, a second linear portion separate from the first linear portion, and a radiused portion provided between and interconnecting the first linear portion and the second linear portion.

2 . The ring of claim 1 , wherein the second channel includes a cross-sectional area when viewed along a horizontal plane perpendicular to the axis and intersecting the second channel, with the cross-sectional area being one of a rectangular cross-sectional area or scalloped cross-sectional area.

3 . The ring of claim 2 , wherein the cross-sectional area is a scalloped cross-sectional area and includes a curved portion extending continuously across a circumferential extend of the second channel.

4 . The ring of claim 1 , wherein the first linear portion extends axially from the first channel, with respect to axis, and the second channel extends radially from the outer wall, with respect to the axis.

5 . The ring of claim 1 , wherein the first channel extends a first circumferential distance and a first radial distance and the second channel extends a second circumferential distance, larger than the first circumferential distance, and a second radial distance, with respect to the axis.

6 . The ring of claim 5 , wherein the first radial distance is larger than the second radial distance.

7 . A ring circumscribing a moveable rod of a hydraulic damper, the moveable rod defining an axis, the ring comprising:
a first wall; a second wall, axially spaced from the first wall, with respect to the axis; an inner wall extending circumferentially about the axis and confronting the moveable rod and extending between the first wall and the second wall; an outer wall extending circumferentially about the axis, the outer wall circumscribing the inner wall and extending between the first wall and the second wall; a fluid passage comprising:
a first channel extending radially along the second wall and from the inner wall, with respect to the axis; and
a second channel at least partially overlapping a portion of the first channel and extending axially along a portion of the outer wall and from the second wall, with respect to the axis; and
a notch extending axially through a portion of the outer wall and being directly fluidly coupled to the second channel.

8 . The ring of claim 7 , wherein:
the first channel extends a first circumferential distance and a first radial distance, with respect to the axis; and the second channel extends a second circumferential distance and a second radial distance, with respect to the axis; and the fluid passage further comprises the notch that extends a third circumferential distance and a second third radial distance, with respect to the axis.

9 . The ring of claim 8 , wherein the second circumferential distance is larger than the first circumferential distance and the third circumferential distance.

10 . The ring of claim 8 , wherein the first circumferential distance is larger than the third circumferential distance.

11 . The ring of claim 8 , wherein the first circumferential distance is smaller than the third circumferential distance.

12 . The ring of claim 8 , wherein the second radial distance and the third radial distance are each smaller than the first radial distance.

13 . The ring of claim 12 , wherein the third radial distance is smaller than the second radial distance.

14 . The ring of claim 12 , wherein the third radial distance is equal to the second radial distance.

15 . The hydraulic damper of claim 7 , wherein the second channel includes a cross-sectional area when viewed along a horizontal plane perpendicular to the axis and intersecting the second channel, with the cross-sectional area being one of a rectangular cross-sectional area or a scalloped cross-sectional area.

16 . The hydraulic damper of claim 15 , wherein the cross-sectional area is a scalloped cross-sectional area and includes a curved portion extending continuously across a circumferential extend of the second channel.

17 . A ring circumscribing a moveable rod of a hydraulic damper, the moveable rod defining an axis, the ring comprising:
a first wall; a second wall, axially spaced from the first wall, with respect to the axis; an inner wall extending circumferentially about the axis and confronting the moveable rod and extending between the first wall and the second wall; an outer wall extending circumferentially about the axis, the outer wall circumscribing the inner wall and extending between the first wall and the second wall; and a fluid passage comprising:
a first channel extending radially along the second wall and from the inner wall, with respect to the axis; and
a second channel at least partially overlapping a portion of the first channel and extending axially along a portion of the outer wall and from the second wall, with respect to the axis,
wherein the second channel extends between the second wall and a point axially prior the first wall, with respect to the axis.

18 . The ring of claim 17 , wherein the second channel includes a cross-sectional area when viewed along a horizontal plane perpendicular to the axis and intersecting the second channel, with the cross-sectional area being one of a rectangular cross-sectional area or a scalloped cross-sectional area.

19 . The ring of claim 18 , wherein the cross-sectional area is a scalloped cross-sectional area and includes a curved portion extending continuously across a circumferential extend of the second channel.

20 . The ring of claim 17 , wherein:
the first channel extends a first circumferential distance and a first radial distance, with respect to the axis; the second channel extends a second circumferential distance and a second radial distance, with respect to the axis; and the second circumferential distance is larger than the first circumferential distance and the first radial distance is larger than the second radial distance.

Assignees

• Driv Automotive Inc
• Advanced Suspension Tech Llc

Inventors

• Roessle Matthew Lawrence
• Mallin Thomas
• Serement Christopher

Classifications

• F16F9/34

  Special valve constructions ({F16F9/44, F16F9/50 take precedence; filtering details F16F9/3285} ; valves in general F16K); Shape or construction of throttling passages · CPC title

• F16F2222/12

  Fluid damping · CPC title

• F16F2230/007

  with, or used as an end stop or buffer; Limiting excessive axial separation · CPC title

• F16F2230/36

  Holes, slots or the like · CPC title

• F16F9/185

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