US 12,460,695 B2
Shock absorber
Kwangduk Baek, Gyeonggi-do (KR); Seungjoon Lee, Seoul (KR); and Jongin Choi, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed on Mar. 7, 2023, as Appl. No. 18/118,143.
Claims priority of application No. 10-2022-0031420 (KR), filed on Mar. 14, 2022.
Prior Publication US 2023/0287956 A1, Sep. 14, 2023
Int. Cl. F16F 13/00 (2006.01); B60G 15/06 (2006.01); B60G 17/08 (2006.01)
CPC F16F 13/007 (2013.01) [B60G 15/061 (2013.01); B60G 17/08 (2013.01); B60G 2202/30 (2013.01); B60G 2204/62 (2013.01); B60G 2206/41 (2013.01); B60G 2500/104 (2013.01); B60G 2800/162 (2013.01); F16F 2222/12 (2013.01); F16F 2228/066 (2013.01); F16F 2232/08 (2013.01); F16F 2234/02 (2013.01)] 24 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 or 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 piston rod configured to support the piston valve and having one end protruding while penetrating the piston valve;
an upper guide member interposed between the piston valve and the body valve and having a plurality of upper guide flow paths formed outside a periphery of the upper guide member, and a plurality of upper guide holes formed inside the periphery of the upper guide member;
a hollow cylindrical expansion member coupled to one end of the piston rod and having expansion through-holes through which the fluid having passed through the plurality of upper guide flow paths and the plurality of upper guide holes passes, the hollow cylindrical expansion member being configured to block the upper guide flow paths when the hollow cylindrical expansion member adjoins the upper guide member; and
an elastic member interposed between the upper guide member and the body valve.