Patent ID: 6314774
Filing Date: 2001-11-13
Classification: E05B,Y10T

Abstract:
A cylinder lock which includes a cylinder plug (3) that is coupled to a driver (20) and rotatably accommodated in a cylinder housing (2), and that includes a key slot (3c) and a row of pin channels (3a) that accommodate a row of pins (5) and co-act with at least two rows of pin channels (2a, 2b) which accommodate pins (4, 5, 6) provided in the cylinder housing (2) and actuated by springs (10), namely a first row of pin channels (2a) corresponding to a standard mode in which a standard key (8) can be inserted into and rotate the plug (3), and a second row of pin channels (2b) that are angled to said first row and correspond to a service mode, wherein one or more of which pin channels (2b) also accommodate an intermediate pin (6) in addition to upper pins (4), wherein subsequent to insertion of a service key (9) in the service mode, the plug (3) can be moved axially from an initial position (position I) to a displacement position (position II) by turning said key, in which latter position the plug-carried pin channels (3a) are located out of line with pin channels (2a, 2b) in the cylinder housing, and wherein a latching element (15) contributes towards preventing withdrawal of the service key (9) in the standard mode, characterised in that the latching element (15) can be rotated together with the plug (3) by means of the standard key and can also be fixed in a position taken in conjunction with said rotation; and in that the plug can be rotated from this position and displaced axially relative to said latching element by means of the service key (9).