Patent ID: 6481254
Filing Date: 2002-11-19
Classification: E05B,Y10T

Abstract:
A cylindrical lock having combinations of pins, comprising:a plug portion defining a plurality of radially-extending pin bores and axially-extending key channel; a shell portion configuration to surround the plug portion and defining a plurality of radially-extending pin bores corresponding to the plug portion pin bores, with each shell portion pin bore having a diameter, the shell portion and the plug portion defining shear line therebetween; a plurality of mechanical pins, each mechanical pin including a first pin portion slidably disposed within one of the plug portion pin bores and a second pin portion slidably disposed in the corresponding shell portion pin bore, the first and second pin portions being biased toward the key channel by a spring such that the second pin portion normally extends across the shear line and into the plug portion pin bore so as to lock the plug portion with respect to the shell portion; a plurality of magnetic pins, each magnetic pin including a magnetic pin portion having a polarity and a diameter and being slidably disposed in one of the plug portion pin bores, a metallic pin portion slidably disposed in the corresponding shell portion pin bore, and a spring disposed within the corresponding shell portion pin bore so as to bias the metallic pin portion toward the plug portion pin bore, the metallic pin portion normally being biased by the spring to extend across the shear line and into the corresponding plug portion pin bore so as to lock the plug portion with respect to the shell portion; and a key configured to be received by the key channel, the key including a plurality of recesses corresponding to the mechanical pins when the key is received in the key channel, the recesses cooperating with the first pin portions so as to urge the second pin portions out of the respective plug portion pin bores and into the corresponding shell portion pin bores against the biasing of the springs, the key further including a plurality of magnetic balls corresponding to the magnetic pins when the key is received in the key channel, each magnetic ball having a polarity the same as the polarity of the corresponding magnetic pin portion, each magnetic ball thereby being configured to repel the corresponding magnetic pin portion when the key is received in the key channel such that each magnetic pin portion urges the corresponding metallic pin portion out of the plug portion pin bore and into the corresponding shell portion pin bore against the biasing of the spring, the diameter of the shell portion pin bore being less than the diameter of the magnetic pin portion so as to prevent the magnetic pin portion from crossing the shear line and entering the shell portion pin bore, the key thereby being configured to cooperate with the mechanical pins and the magnetic pins when the key is received in the key channel so as to unlock the plug portion with respect to the shell portion.