US 12,420,606 B2
Dual piston adjuster
Jeff Halper, Scotts Valley, CA (US); and Ryan Raker, La Mesa, CA (US)
Assigned to ACCUTUNE OFF-ROAD, INC., El Cajon, CA (US)
Filed by ACCUTUNE OFF-ROAD, INC., El Cajon, CA (US)
Filed on Oct. 20, 2023, as Appl. No. 18/491,151.
Prior Publication US 2025/0128558 A1, Apr. 24, 2025
Int. Cl. B60G 17/015 (2006.01); F16F 9/348 (2006.01); F16F 9/44 (2006.01); F16F 9/50 (2006.01)
CPC B60G 17/015 (2013.01) [F16F 9/3484 (2013.01); F16F 9/44 (2013.01); F16F 9/50 (2013.01); F16F 2230/186 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A dual piston adjuster for a shock absorber, the dual piston adjuster comprising:
a first damping piston;
a second damping piston;
a first fluid path having a first cross-sectional flow area and providing fluid communication bypassing the first damping piston and the second damping piston;
a second fluid path providing fluid communication from the first fluid path through the first damping piston and the second damping piston in series;
a third fluid path having a second cross-sectional flow area and providing fluid communication from the second fluid path at a location between the first damping piston and the second damping piston to bypass the second damping piston;
a first adjustable valve configured to selectively adjust a first pressure drop of a working fluid in the first fluid path; and
a second adjustable valve configured to selectively adjust a second pressure drop of the working fluid in the third fluid path.