US 9,809,080 B2
Position dependent damper for a vehicle suspension system
Erik S. Ellifson, Oshkosh, WI (US); Patrick S. Dillman, Lannon, WI (US); Jason J. Zuleger, Appleton, WI (US); Aaron J. Rositch, Oshkosh, WI (US); and Robert K. Sollenskog, Oshkosh, WI (US)
Assigned to Oshkosh Defense, LLC, Oshkosh, WI (US)
Filed by Oshkosh Defense, LLC, Oshkosh, WI (US)
Filed on Feb. 19, 2016, as Appl. No. 15/48,931.
Application 15/048,931 is a continuation of application No. 14/334,305, filed on Jul. 17, 2014, granted, now 9,291,230.
Application 14/334,305 is a continuation of application No. 13/792,154, filed on Mar. 10, 2013, granted, now 8,801,017.
Claims priority of provisional application 61/615,717, filed on Mar. 26, 2012.
Prior Publication US 2016/0167475 A1, Jun. 16, 2016
Int. Cl. F16F 9/19 (2006.01); F16F 9/48 (2006.01); B60G 17/08 (2006.01); F16F 9/28 (2006.01); B60G 11/26 (2006.01); B60G 13/08 (2006.01); B60G 21/073 (2006.01); F16F 9/346 (2006.01)
CPC B60G 17/08 (2013.01) [B60G 11/265 (2013.01); B60G 13/08 (2013.01); B60G 21/073 (2013.01); F16F 9/19 (2013.01); F16F 9/28 (2013.01); F16F 9/346 (2013.01); F16F 9/48 (2013.01); B60G 2202/24 (2013.01); B60G 2500/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A damper assembly for a vehicle suspension system, comprising:
a primary damper; and
a secondary damper, comprising:
a housing including a wall that at least partially surrounds at least a portion of the primary damper, the volume between the wall and the primary damper defining a chamber, wherein the wall defines an aperture;
a piston positioned within the chamber;
a conduit defining a flow path that includes the aperture; and
a valve disposed along the flow path,
wherein the primary damper is configured to provide a base damping force and the secondary damper is configured to provide a supplemental damping force that varies based on the position of the piston within the chamber.