US 12,442,430 B2
Damper with base line valve
Stefan Deferme, Heusden-Zolder (BE)
Assigned to Advanced Suspension Technology LLC, Northville, MI (US)
Filed by ADVANCED SUSPENSION TECHNOLOGY LLC, Northville, MI (US)
Filed on Apr. 17, 2023, as Appl. No. 18/301,452.
Prior Publication US 2024/0344582 A1, Oct. 17, 2024
Int. Cl. F16F 9/34 (2006.01); F16F 9/19 (2006.01); F16F 9/516 (2006.01); F16K 15/02 (2006.01); B60G 13/08 (2006.01); B60G 17/08 (2006.01)
CPC F16F 9/34 (2013.01) [F16F 9/19 (2013.01); F16F 9/516 (2013.01); F16K 15/026 (2013.01); B60G 13/08 (2013.01); B60G 17/08 (2013.01); B60G 2202/24 (2013.01); B60G 2204/62 (2013.01); B60G 2206/41 (2013.01); B60G 2500/11 (2013.01); B60G 2800/162 (2013.01); F16F 2222/12 (2013.01); F16F 2228/066 (2013.01); F16F 2232/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A damper, comprising:
a tube extending longitudinally between a first tube end and a second tube end;
a piston slidably disposed within the tube and defining a first working chamber and a second working chamber; and
a base line valve arranged in fluid communication with at least one of the first working chamber and the second working chamber, wherein:
the base line valve includes a valve housing, a plug positioned within the valve housing and slidably disposed along a valve axis between open and closed positions, and a spring urging the plug toward the closed position, the plug including a plug nose extending through an opening of the valve housing,
the plug nose including a first annular surface and a second annular surface, the second annular surface being tapered in shape, and
the first annular surface of the plug nose being sealingly engaged with a seat of the valve housing to close the opening of the valve housing when the plug is in the closed position, the second annular surface of the plug nose being positioned at least partially outside of the valve housing and positioned radially inward of the seat by a first dimension when the plug is in the closed position, the second annular surface being positioned radially inward of the seat by a second dimension greater than the first dimension when the plug is in the open position.