Ernest J. Maffei - Syracuse NY David W. Patch - Clay NY
International Classification:
A61F 504 A61B 1718
US Classification:
128 92BC
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.
Ernest Maffei - Syracuse NY David W. Patch - Clarkesville GA
International Classification:
A61F 504
US Classification:
128 92BC
Abstract:
A bone-setting assembly essentially comprised of a pair of tubular members adapted to be inserted in the intramedullary passages of the respective parts of a broken bone, and a central connecting and aligning pin that is arranged to be slidably received in the interior passages of the tubular members. The tubular members are driven into position in the bone passages and a portion of the exterior surface of each member is roughened to firmly fix the member in the bone. The interior passages of the tubular members are preferably square in cross section and the central pin has a conforming square cross section so that there can be no relative rotation between the tubular members and thus between the parts of the broken bone. The central pin is threaded over approximately half of its length and a nut is threaded on this portion of the pin. After the tubular members have been positioned in the respective parts of the broken bone, the central pin is inserted in one of the members with only the end of its threaded portion extending outwardly from the tubular member and having the nut threaded thereon.