US 12,251,323 B2
Height-expandable spinal cage
Kyoung Gee Ahn, Seoul (KR)
Assigned to Kyoung Gee Ahn, Seoul (KR); GBS Commonwealth Co., Ltd., Seoul (KR); and PMT Republic, Inc., Walnut, CA (US)
Filed by GBS Commonwealth Co., Ltd., Seoul (KR); PMT Republic, Inc., Walnut, CA (US); and Kyoung Gee Ahn, Seoul (KR)
Filed on Jul. 22, 2022, as Appl. No. 17/871,864.
Claims priority of application No. 10-2021-0111813 (KR), filed on Aug. 24, 2021.
Prior Publication US 2023/0060949 A1, Mar. 2, 2023
Int. Cl. A61F 2/44 (2006.01); A61F 2/28 (2006.01); A61F 2/46 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/447 (2013.01) [A61F 2/28 (2013.01); A61F 2/4611 (2013.01); A61F 2002/30383 (2013.01); A61F 2002/30515 (2013.01); A61F 2002/30617 (2013.01); A61F 2002/30904 (2013.01); A61F 2002/448 (2013.01); A61F 2220/0025 (2013.01); A61F 2250/0097 (2013.01); A61F 2310/00359 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A height-expandable spinal cage comprising:
an upper plate and a lower plate disposed to face each other;
a frame disposed between the upper plate and the lower plate, the frame having a space formed therein;
a block disposed between the upper plate and the lower plate and movable in a longitudinal direction of the frame inside the frame; and
a driving bolt having one end thereof connected to the block to move the block,
wherein a distance between the upper plate and the lower plate is increased or decreased when the block moves in the longitudinal direction,
wherein the frame comprises:
a front part having a front hole formed therein, the front hole allowing another end of the driving bolt to be inserted thereinto;
a connection part extending in the longitudinal direction from one end of the front part; and
a rear part coupled to one end of the connection part,
wherein an internal space is defined between the front part and the rear part in the longitudinal direction by the connection part,
the front part has one surface contacting the upper plate, the one surface having a first front inclined rail formed thereon, and another surface contacting the lower plate, the another surface having a second front inclined rail formed thereon, and
the upper plate has an upper inclined rail formed thereon to allow the first front inclined rail to be inserted thereinto and accommodated therein, and the lower plate has a lower inclined rail formed thereon to allow the second front inclined rail to be inserted thereinto and accommodated therein.