Surgery – Truss – Perineal
Patent
1976-05-19
1977-04-12
Frinks, Ronald L.
Surgery
Truss
Perineal
A61F 504, A61B 1718
Patent
active
040168743
ABSTRACT:
A pin for insertion in the intramedullary passage of a broken bone has two generally tubular outer parts for insertion into the respective parts of a broken bone from an incision at the break, each having tapping threads along the distal end thereof and following threads along the proximal end thereof. The outer parts each have a reduced central axial hole which is square along a portion of both the distal and proximal ends thereof. The third central major part is a rod substantially equal in length to the combined lengths of the outer parts and having a cross-sectional configuration substantially conforming to the square portion of the axial hole of the tubular parts for a slide fit therethrough. One end of the central part has a recess in one end containing a spring pressed locking ball projecting outwardly from one side thereof and one or both tubular parts have a recess therein adapted for locking engagement with the spring-pressed ball when in register therewith. The central part has a plurality of longitudinally spaced recesses along at least one side whereby the central part may be moved from within one tubular part into the other tubular part when the tubular parts are aligned and spaced apart.
REFERENCES:
patent: 2490364 (1949-12-01), Livingston
patent: 2672861 (1954-03-01), Jonas et al.
patent: 2675801 (1954-04-01), Bambara et al.
patent: 2985168 (1961-05-01), Jonas et al.
patent: 3717146 (1973-02-01), Halloran
patent: 3744488 (1973-07-01), Cox
Maffei Ernest J.
Patch David W.
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