| 摘要 |
A drill resistant lock cylinder ( 100 ) is useful for resisting attempts to defeat the cylinder ( 100 ) using locks or picks. The cylinder ( 100 ) includes a cylinder housing ( 105 ) having a central axis. Two pinion cylinders ( 115, 125 ) are positioned inside the cylinder housing ( 105 ) along the central axis. A combination pin cylinder ( 120 ) is positioned along the central axis between the two pinion cylinders ( 115, 125 ), and the combination pin cylinder ( 120 ) and each pinion cylinder ( 115, 125 ) includes axial pinholes ( 220 ) there through. Pins ( 130 ) located inside the axial pinholes ( 220 ) in the combination pin cylinder ( 120 ) and the pinion cylinders ( 115, 125 ) establish two shear lines along axial ends of the pinion cylinders ( 115, 125 ).
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