Patent ID: 6708539
Filing Date: 2004-03-23
Classification: E05B,Y10T

Abstract:
Removable core cylinder lock, comprisinga cylinder lock casing (10) having interior wall surfaces (13) defining an axially extending cavity (11) with an insertion opening, a removable cylinder lock core (20) which has an outer cross sectional contour corresponding to an inner cross sectional contour of said casing and which is axially insertable into said cavity through said insertion opening, said lock core having an upper, substantially massive part (27) with a row of holes (28) for accommodating locking tumblers (70), and a lower part (21) defining a cylindrical bore extending axially therethrough, a cylindrical, rotatable key plug (60) located in said cylindrical bore and having a longitudinal key slot for receiving a key co-operating with said locking tumblers, and a retainer member (40) being transversely movable in a chamber (30) in the upper part of said lock core between a first position, in which it positively locks said lock core in its axially inserted position, and a second position, in which said lock core may be axially inserted into or retracted from said casing, said retainer member having a locking surface (49) facing towards said insertion opening and engaging with said casing when said retainer member is in said first position, wherein: said lock casing (10) comprises a locking projection (12), which protrudes from one of said interior wall surfaces (13) so as to project inwardly from said inner cross sectional contour and to engage with said locking surface of said retainer member (40), when the latter is in said first position, and said retainer member (40) is movable circumferentially relative to said cylindrical bore, said lock core being provided with a longitudinal recess which, when said retainer member is located in said second position and said lock core is being inserted into or retracted from said casing, form a longitudinal passage (24) located adjacent to said chamber (30) in the region of said outer cross sectional contour and being dimensioned to accommodate said locking projection that extends into said longitudinal passage.