Damper assembly

Patent metadata

Field	Value
Publication number	US-11209067-B2
Application number	US-201916517209-A
Country	US
Kind code	B2
Filing date	Jul 19, 2019
Priority date	Mar 14, 2011
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A damper assembly includes an outer cylinder, an inner cylinder, a plunger, a passage, and a piston. The inner cylinder is positioned at least partially within the outer cylinder and has a cap attached to one end thereof. The plunger is positioned radially inward from the inner cylinder and coupled to a rod. The plunger, the cap, and an interior of the inner cylinder at least partially define a first chamber. The passage extends through the rod and is fluidly coupled with the first chamber. The piston is coupled to the inner cylinder and extends radially outward toward the outer cylinder. The piston, an exterior surface of the inner cylinder, and the outer cylinder at least partially define a second chamber. The plunger is configured to move relative to the inner cylinder, and the piston is configured to move relative to the outer cylinder.

First claim

The invention claimed is:

1. A suspension system, comprising:
a first damper comprising:
a first chamber at least partially defined by a first movable surface of a first plunger and by a first inner cylinder, the first plunger movable relative to and within the first inner cylinder to adjust the volume of the first chamber;
a first aperture configured to facilitate fluid flow into and out of the first chamber;
a second chamber at least partially defined by a second movable surface of a first piston and by a first outer cylinder, the second chamber fluidly separate from the first chamber, wherein the first piston extends outwardly away from the first inner cylinder toward the first outer cylinder; and
a second aperture configured to facilitate fluid flow into and out of the second chamber; and

a second damper comprising:
a third chamber defined by a third movable surface of a second plunger;
a third aperture configured to facilitate fluid flow into and out of the third chamber;
a fourth chamber defined by a fourth movable surface of a second piston; and
a fourth aperture configured to facilitate fluid flow into and out of the fourth chamber;

wherein the first chamber is fluidly coupled to one of the third chamber and the fourth chamber; and
wherein the second chamber is fluidly coupled to the other of the third chamber and the fourth chamber.

2. The suspension system of claim 1 , wherein the first plunger is received within the first inner cylinder and is coupled to an end of a first rod extending at least partially within the first inner cylinder, the first rod having an outer diameter that is smaller than an inner diameter of the first inner cylinder.

3. The suspension system of claim 1 , further comprising:
a first valve assembly in fluid communication with the first aperture and the second aperture; and
a second valve assembly in fluid communication with the third aperture and the fourth aperture.

4. The suspension system of claim 3 , further comprising:
a first accumulator coupled to a first conduit, the first conduit coupling the first chamber to one of the third chamber and the fourth chamber to create fluid communication therebetween, and
a second accumulator coupled to a second conduit, the second conduit coupling the second chamber to the other of the third chamber and the fourth chamber to create fluid communication therebetween;
wherein a response of the first damper and the second damper is at least partially controlled via operation of the first valve assembly and the second valve assembly in combination with the first accumulator and the second accumulator.

Assignees

• Oshkosh Defense Llc

Inventors

• Ellifson Erik
• Rosenboom Darin

Classifications

• B60G21/073 Primary

  between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected · CPC title

• F16F9/062

  Bi-tubular units · CPC title

• B60G2206/124

  the arm having triangular or Y-shape, e.g. wishbone · CPC title

• B60G2200/14

  with lateral arms · CPC title

• B60G2206/12

  with two attachment points on the sprung part of the vehicle · CPC title