US 11,835,104 B2
Dual-acting single-spring twin-tube shock absorber assembly
Rajeev Mokashi, Maharashtra (IN); and Anshul Goel, Maharashtra (IN)
Assigned to Duroshox Private Limited, Maharashtra (IN)
Filed by Duroshox Private Limited, Maharashtra (IN)
Filed on Jan. 28, 2022, as Appl. No. 17/587,919.
Claims priority of application No. 202121034449 (IN), filed on Jul. 30, 2021.
Prior Publication US 2023/0036981 A1, Feb. 2, 2023
Int. Cl. F16F 13/00 (2006.01); F16F 9/36 (2006.01)
CPC F16F 13/007 (2013.01) [F16F 9/362 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A dual-acting single-spring twin-tube shock absorber assembly (100) comprising:
a. at least one twin-tube shock absorber component (10) with at least one internal bore comprising a first twin-tube shock absorber component end (10a) and a second twin-tube shock absorber component end (10b); wherein at least one top stopper (12a) and at least one bottom stopper (12b) are irreversibly affixed onto the outer wall of the at least one twin-tube shock absorber component;
b. at least one piston rod component (14) coaxially coupled with the at least one twin-tube shock absorber component (10) and comprising a first piston rod end (14a) and a second piston rod end (14b), wherein the second piston rod end (14b) is disposed within the at least one internal bore of the at least one twin-tube shock absorber component (10) and is configured to telescope in and out of out of the at least one twin-tube shock absorber component (10) with compression and extension stroke respectively;
c. at least one helical compression spring (16) disposed outside the outer wall of the at least one twin-tube shock absorber component (10), between the at least one top stopper (12a) and the at least one bottom stopper (12b), thereby restricting the movement of the at least one helical compression spring (16) there-between during compression or extension stroke and is not preloaded and has a zero load neutral position;
d. at least one spring actuator component (18) comprising a pusher element (18a) and a puller element (18b), wherein a first end of the pusher element (18a1) is irreversibly affixed to the first piston rod end (14a) of the at least one piston rod component (14) and a second end (18a2) of the pusher element (18a) is reversibly affixed to a first end (18b1) of the puller element (18b); wherein the second end (18b2) of the puller element (18b) is unfettered and moves longitudinally along the length of the at least one twin-tube shock absorber component (10) with compression and extension stroke; and
e. at least one spring guide component (20) disposed between the at least one helical compression spring (16) and the outer wall of the at least one twin-tube shock absorber component (10) body,
wherein the at least one spring actuator component (18) is adapted to:
i. achieve a neutral position at the center without preload;
ii. move in an upward direction during extension stroke thereby compressing the at least one helical compression spring (16) against the at least one top stopper (12a) in the upward direction; and
iii. move in a downward direction during compression stroke thereby compressing the at least one helical compression spring (16) against the at least one bottom stopper (12b) in the downward direction;
thereby performing the dual action of achieving compression and extension force.