US 12,291,297 B2
Height adjustable seat posts for bicycles
Rafer Chambers, Colorado Springs, CO (US); Christopher Eric Golkiewicz, Colorado Springs, CO (US); Chi Hui Su, Taichung (TW); Donald Frederick Coffman, Colorado Springs, CO (US); Alex Kyle McGee, Colorado Springs, CO (US); and Charles Dunlap, Manitou Springs, CO (US)
Assigned to SRAM, LLC, Chicago, IL (US)
Filed by SRAM, LLC, Chicago, IL (US)
Filed on Feb. 15, 2023, as Appl. No. 18/169,512.
Application 18/169,512 is a continuation in part of application No. 17/991,205, filed on Nov. 21, 2022.
Prior Publication US 2024/0166286 A1, May 23, 2024
Int. Cl. B62M 9/124 (2010.01); B62J 1/08 (2006.01); B62K 23/00 (2006.01)
CPC B62J 1/08 (2013.01) [B62J 2001/085 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A height adjustable seat post for a bicycle, the height adjustable seat post comprising:
an upper tube and a lower tube configured in a telescopic arrangement, a lower end of the lower tube to be coupled to a frame of the bicycle, the upper tube to be coupled to a seat;
a shaft coupled to the lower tube and extending into the upper tube;
a piston assembly coupled to the shaft and disposed in the upper tube, the piston assembly including a piston dividing the upper tube into a first chamber and a second chamber, the first and second chambers filled with fluid;
a valve operable between a closed state in which the fluid is blocked from flowing between the first and second chambers and an open state to enable the fluid to flow between the first and second chambers; and
a solenoid to control the valve.