IP Library › Granted Patent US 12698816
Granted Patent B2
US 12698816 · App. 18/232,619 · Granted Aug 4, 2026

Hydraulic damper having a ring

Inventor: Thomas Mallin (Temperance, MI)
Assignee: Advanced Suspension Technology LLC
F16F9/36F16F9/516B60G13/08B60G17/08B60G2202/24B60G2204/62B60G2206/41B60G2500/104B60G2600/21B60G2800/162B60G2800/916F16F9/18F16F2222/12F16F2228/066F16F2230/02F16F2230/30
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Quick Facts
Patent No.
US 12698816
App. No.
18/232,619
Filed
Aug 10, 2023
Granted
Aug 4, 2026
Kind
B2
Art Unit
3616
USPC
188/281
Abstract

A hydraulic damper comprising a moveable rod, a collar, and a ring. The moveable rod having a centerline axis. The collar circumscribing and coupled to the moveable rod. The ring axially adjacent the collar and having an inner wall, an outer wall, a first wall, and a second wall. The inner wall circumscribing the moveable rod. The outer wall circumscribing the inner wall. The ring further having a boss provided on the first wall.

Claims (33)

1 . A hydraulic damper comprising:

a moveable rod having a centerline axis;

a collar circumscribing and coupled to the moveable rod; and

a ring axially adjacent the collar, the ring comprising:

an inner wall extending circumferentially about the centerline axis and circumscribing the moveable rod;

an outer wall extending circumferentially about the centerline axis, the outer wall circumscribing the inner wall;

a first wall interconnecting the inner wall and the outer wall at a first end of the ring, the first wall being axially adjacent the collar;

a second wall, axially spaced from the first wall, interconnecting the inner wall and the outer wall at a second end, axially opposing the first end, of the ring; and

a boss provided along a portion of the first wall and defining a raised portion of the first wall, the boss terminating prior to the inner wall, the boss forming a contact point defining a fluid-tight seal with the collar during a first stroke of the hydraulic damper.

2 . The hydraulic damper of claim 1 , wherein the boss extends radially between an inner end and an outer end, with the inner end defining the contact point.

3 . The hydraulic damper of claim 2 , wherein the inner end extends continuously, circumferentially about the centerline axis between circumferentially distal ends of the first wall.

4 . The hydraulic damper of claim 1 , wherein a gap is formed between the boss and the collar during a second stroke, opposing the first stroke, of the hydraulic damper.

5 . The hydraulic damper of claim 1 , wherein the boss extends radially inwardly from the outer wall and towards the inner wall.

6 . The hydraulic damper of claim 5 , wherein the boss terminates radially prior to the inner wall.

7 . The hydraulic damper of claim 1 , wherein the ring further comprises a set of exterior channels extending axially along the outer wall between the first wall and the second wall.

8 . The hydraulic damper of claim 7 , wherein each exterior channel of the set of exterior channels includes a cross-sectional area when viewed along a plane perpendicular to the centerline axis, the cross-sectional area being non-constant from the first wall to the second wall.

9 . The hydraulic damper of claim 7 , wherein the set of exterior channels extend through the boss.

10 . The hydraulic damper of claim 1 , wherein the ring further comprises a set of interior channels extending axially along the inner wall between the first wall and the second wall.

11 . The hydraulic damper of claim 10 , wherein the set of interior channels include a series of peaks and valleys.

12 . The hydraulic damper of claim 11 , wherein the boss terminates radially prior to the valleys.

13 . The hydraulic damper of claim 1 , wherein the ring further comprises a set of connecting channels extending radially along the second wall between the inner wall and the outer wall.

14 . The hydraulic damper of claim 1 , wherein the first wall includes a first distal end and a second distal end, with the boss extending continuously between the first distal end and the second distal end.

15 . The hydraulic damper of claim 1 , further comprising a spacer provided radially between the inner wall and the moveable rod.

16 . A ring for a hydraulic damper having a moveable rod having a centerline axis, the ring comprising:

an inner wall extending circumferentially about the centerline axis and circumscribing the moveable rod;

an outer wall extending circumferentially about the centerline axis, the outer wall circumscribing the inner wall;

a first wall interconnecting the inner wall and the outer wall at a first end of the ring;

a second wall, axially spaced from the first wall, interconnecting the inner wall and the outer wall at a second end, axially opposing the first end, of the ring; and

a boss provided along a portion of the first wall and defining a raised portion of the first wall, the boss terminating prior to the inner wall, the boss positioned and shaped to form a contact point defining a fluid-restricting seal with a corresponding portion of the hydraulic damper during a first stroke of the hydraulic damper.

17 . The ring of claim 16 , wherein the boss extends radially inwardly from the outer wall and towards the inner wall.

18 . The ring of claim 17 , wherein the boss terminates radially prior to the inner wall.

19 . The ring of claim 16 , wherein the first wall includes a first distal end and a second distal end, with the boss extending continuously between the first distal end and the second distal end.

20 . The ring of claim 16 , further comprising a set of interior channels defined by a series of peaks and valleys, with the ring terminating radially prior to the valleys.