US 11,912,086 B2
Suspension pre-load adjustment system
Gordon J. Steinmetz, Pine Spring, MN (US); Jonathon P. Graus, Stacy, MN (US); and David D. Helgeson, Roseville, MN (US)
Assigned to Polaris Industries Inc., Medina, MN (US)
Filed by Polaris Industries Inc., Medina, MN (US)
Filed on May 19, 2021, as Appl. No. 17/324,942.
Application 17/324,942 is a continuation of application No. 16/173,249, filed on Oct. 29, 2018, granted, now 11,021,031, issued on Jun. 1, 2021.
Prior Publication US 2021/0268858 A1, Sep. 2, 2021
Int. Cl. B60G 17/015 (2006.01); B60G 11/58 (2006.01); B60G 15/06 (2006.01); B60G 17/019 (2006.01); B60G 17/02 (2006.01); B60G 17/027 (2006.01); B60G 17/056 (2006.01); F16F 1/12 (2006.01); F16F 9/56 (2006.01)
CPC B60G 17/0157 (2013.01) [B60G 11/58 (2013.01); B60G 15/063 (2013.01); B60G 17/019 (2013.01); B60G 17/021 (2013.01); B60G 17/0272 (2013.01); B60G 17/056 (2013.01); F16F 1/121 (2013.01); F16F 9/56 (2013.01); B60G 2202/12 (2013.01); B60G 2202/24 (2013.01); B60G 2204/1242 (2013.01); B60G 2204/62 (2013.01); B60G 2300/07 (2013.01); B60G 2300/12 (2013.01); F16F 2228/08 (2013.01); F16F 2230/08 (2013.01); F16F 2230/18 (2013.01); F16F 2236/04 (2013.01); F16F 2238/026 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A suspension system for a vehicle, comprising:
a shock absorber housing having a longitudinal axis;
a spring disposed around the shock absorber housing;
a retainer collar disposed around the shock absorber housing;
an actuator engaged to the retainer collar, the actuator moves at least a portion of the retainer collar to move the spring in a direction corresponding the longitudinal axis, the actuator comprises a motor coupled to the retainer collar;
said shock absorber housing comprises first external threads and the retainer collar comprises internal threads engaging the first external threads, the motor rotating the retainer collar around the longitudinal axis so that the internal threads move relative to the first external threads and the spring moves in an axial direction, the first external threads disposed within a flanged extension disposed at a first end of the shock absorber housing,
a first seal disposed between the shock absorber housing and the retainer collar and a second seal disposed between the flanged extension and the retainer collar;
a switch generating a ride height position signal; and
a controller coupled to the actuator and the switch, said controller controlling a position of the actuator in response to the ride height position signal.