US 12,234,881 B2
Shock absorber
Sangyeon Cho, Suwon-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Filed by HL Mando Corporation
Filed on Jul. 22, 2022, as Appl. No. 17/871,172.
Claims priority of application No. 10-2022-0010630 (KR), filed on Jan. 25, 2022.
Prior Publication US 2023/0235806 A1, Jul. 27, 2023
Int. Cl. F16F 9/49 (2006.01); F16F 9/10 (2006.01); F16F 9/348 (2006.01); F16F 9/48 (2006.01); B60G 13/08 (2006.01)
CPC F16F 9/103 (2013.01) [F16F 9/348 (2013.01); B60G 13/08 (2013.01); F16F 2222/12 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A shock absorber comprising:
a tube having an interior filled with a fluid;
a piston valve configured to be movable upward and downward in the tube and having a flow path through which the fluid flows;
a body valve installed at a lower side of the tube and having a flow path through which the fluid flows;
a lower guide member installed between the piston valve and the body valve and comprising a lower through-hole through which the fluid passes, and a lower passing slit formed to allow the fluid to pass therethrough at a flow rate relatively lower than a flow rate at which the fluid passes through the lower through-hole;
a mid-guide member having a mid-guide hole through which the fluid passes, the mid-guide member being disposed to be movable upward and downward between the piston valve and the lower guide member and configured to close the lower through-hole when the mid-guide member is in contact with the lower guide member;
a first elastic member interposed between the lower guide member and the mid-guide member; and
a second elastic member interposed between the piston valve and the mid-guide member and having a relatively larger elastic modulus than the first elastic member.