Patent ID: 8061168
Filing Date: 2011-11-22
Classification: E05B,Y10T

Abstract:
1. A key ( 100 ) with a longitudinally extending key blade ( 102 ) adapted to be used with a housing ( 204 ) having a cylindrical bore ( 203 ), a cylindrical key plug ( 202 ) being rotatably journalled in said cylindrical bore, said key plug having a longitudinal key slot ( 201 ) and, at a side of said key slot, a number of side locking tumblers ( 206 ) in a row cooperating with a side locking means ( 213 ) for locking the key plug against rotation in the cylindrical bore, at least one of said side locking tumblers ( 206 ) comprising a cylindrical body portion ( 206 b ) being mounted in an associated chamber ( 207 ) for elevational and rotational movement therein, and a finger ( 208 ) which projects transversely from said body portion ( 206 b ), said elevational movement being performed against the action of a force exerted along said chamber ( 207 ), and said rotational movement of the side locking tumbler ( 206 ) being caused by a pivotal motion performed by the associated finger ( 208 ), the rotational movement of the side locking tumbler ( 206 ) being limited between two angular end positions corresponding to a respective pivotal end position of the finger ( 208 ), said longitudinally extending key blade ( 102 ) being adapted to be insertable into said key slot ( 201 ) of the key plug ( 202 ) of an associated lock ( 200 ); and a wave-like side code pattern ( 105 ) forming a wave-like guiding surface including a ramp portion ( 106 ) at the free end portion ( 107 ) of the key blade, said wave-like guiding surface being formed on said key blade ( 102 ) at a side ( 110 S) thereof, said wave-like guiding surface ( 105 ) being adapted to engage with said finger ( 208 ) of said at least one side locking tumbler ( 206 ) and making the finger follow said wave-like guiding surface, wherein said code pattern ( 105 ) comprises a plurality of code portions (L 1 -L 7 ; R 1 -R 7 ; S 1 -S 7 ) each formed in the key blade ( 102 ) by an array of a plurality of longitudinally and vertically distributed concavities for providing a distinct and specific longitudinal and vertical distributed concavity for defining a pivotal position of said finger ( 208 ) for a left asymmetric key contacting portion ( 220 l ), a right asymmetric key contacting portion ( 220 r ) and a symmetric key contacting portion ( 220 s ) located at respective longitudinal and vertical distances longitudinally and vertically along the key blade to correspond to tumbler locations (C 1 , C 2 , C 3 , C 4 , C 5 ), each of said plurality of code portions (L 1 -L 7 ; R 1 -R 7 ; S 1 -S 7 ) corresponding to the distinct and specific longitudinal and vertical distributed concavity for defining the pivotal position of said finger ( 208 ) associated with the corresponding tumbler locations (C 1 , C 2 , C 3 , C 4 , C 5 ), with at least one of the left code portion and the right code portion being disposed an added displacement (d) along a length of the key blade ( 102 ) relative to the plurality of code portions of a symmetric key contacting portion ( 220 s ) for corresponding to the location of at least one of the left asymmetric key contacting portion ( 200 l ) and the right asymmetric key contacting portion ( 220 r ) at the free end portion of said finger ( 208 ).