US 12,281,668 B2
Bolt fastening structure and anti-vibration device including the same
Chang Su Lim, Hwaseong-si (KR)
Assigned to GNI CO., LTD, (KR)
Filed by GNI. Co., Ltd., Hwaseong-si (KR)
Filed on Nov. 29, 2022, as Appl. No. 18/071,602.
Claims priority of application No. 10-2022-0016575 (KR), filed on Feb. 9, 2022.
Prior Publication US 2023/0250844 A1, Aug. 10, 2023
Int. Cl. F16B 39/02 (2006.01); F16B 41/00 (2006.01); F16B 43/00 (2006.01); F16B 5/02 (2006.01)
CPC F16B 41/002 (2013.01) [F16B 43/00 (2013.01); F16B 5/0241 (2013.01); F16B 2200/20 (2018.08)] 11 Claims
OG exemplary drawing
 
1. A bolt fastening structure comprising:
an L-shaped bolt which is inserted into a hole of a substructure and includes an upper vertical portion having a thread groove and a lower horizontal portion extending from a lower end of the upper vertical portion, wherein the substructure is positioned below equipment of an industrial plant and has the hole for fastening formed therein; and
a fall prevention washer which is fastened to the L-shaped bolt in a ring shape and is fastened to the hole of the substructure to prevent the L-shaped bolt from falling below the substructure, wherein the fall prevention washer includes:
an insertion portion inserted into the hole of the substructure; and
a locking portion which is formed to extend upward from the insertion portion and in which the L-shaped bolt is insertion-coupled to a central portion thereof.