Patent ID: 7240525
Filing Date: 2007-07-10
Classification: E05B,Y10T

Abstract:
1. Master-keyed pin drum lock with relative master key, each pin having an inner window ( 20 ) with an outer protuberance ( 21 ) which a spring (m) acts upon and an inner projection ( 22 ) which the key( 3 ) acts upon giving rise to the movement of the pin ( 2 ). ( 2 ), the inner projections ( 22 ) are at different heights and the pins are placed so that some move in one direction and others in the opposite direction; on one of its sides the key ( 3 ) has a notch ( 31 ′) whose minimum width (d 1 ) is the distance between the maximum level (h 1 ) reached by the projections ( 22 ′) of the pins ( 2 ) which move in one direction and the maximum level (h 1 ) reached by those of the pins that move in the opposite direction; wherein: a) each pin ( b) the key (