US 12,290,291 B2
Proximal-femur intraosseous release device
Licheng Zhang, Beijing (CN); Peifu Tang, Beijing (CN); Chi Ma, Beijing (CN); Xiang Cui, Beijing (CN); Pengbin Yin, Beijing (CN); Yong Xie, Beijing (CN); and Junsong Wang, Beijing (CN)
Assigned to The Fourth Medical Center of the Chinese People's Liberation Army General Hospital, Beijing (CN)
Filed by The Fourth Medical Center of the Chinese People's Liberation Army General Hospital, Beijing (CN)
Filed on Nov. 27, 2024, as Appl. No. 18/963,373.
Claims priority of application No. 202311702387.0 (CN), filed on Dec. 12, 2023.
Prior Publication US 2025/0082377 A1, Mar. 13, 2025
Int. Cl. A61B 17/74 (2006.01); A61B 17/02 (2006.01); A61B 17/34 (2006.01); A61B 17/56 (2006.01); A61B 17/72 (2006.01); A61F 2/46 (2006.01); A61M 39/02 (2006.01)
CPC A61B 17/74 (2013.01) [A61B 17/3472 (2013.01); A61B 17/7258 (2013.01); A61M 39/0247 (2013.01); A61B 2017/0275 (2013.01); A61B 2017/561 (2013.01); A61F 2/4607 (2013.01); A61M 2039/025 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A proximal-femur intraosseous release device, comprising a release mechanism, wherein a primary fixing mechanism is provided at one end of the release mechanism, the primary fixing mechanism comprises a first shell, a top cover is movably mounted at a top of the first shell, a limiting ring is provided at a bottom of the first shell, the limiting ring is connected with an inner side wall of the first shell, and a second shell, a first triangular block and a second triangular block are arranged inside the first shell;
an outer side wall of the second shell is provided with a thread groove to be screwed to the inner side wall of the first shell through threads, a bottom of the second shell is rotatably connected with the first triangular block, the first triangular block is slidably connected with the inner side wall of the first shell and is capable of sliding along a longitudinal direction of the first shell, a bottom surface of the first triangular block is a first inclined surface, the second triangular block is located at a bottom of the first triangular block, a top surface of the second triangular block is a second inclined surface and a through hole matched with the second triangular block is formed in a side wall of the first shell;
first limiting blocks are further arranged in the first shell, the first limiting blocks are located on two sides of the second triangular block, first stoppers are arranged on the two sides of the second triangular block respectively, the first stopper is located at an end close to a tip of the second triangular block, a transverse groove matched with the first stopper is formed in the first limiting block, a second limiting block is provided at one end of the transverse groove, the second limiting block is located at an end away from the tip of the second triangular block, and a first spring is connected between the second limiting block and the first stopper.