Abstract: A substantially flat key blade extends from a grip portion along a longitudinal axis and includes a connecting portion adjoining to the grip portion, a major longitudinal bitting portion provided with a row of coded cuts, and a free tip portion. The connecting portion of the key blade is provided with a first selectable abutment surface facing in the forward direction. The first abutment surface is formed as a forward end surface of a longitudinal rib portion located at a lateral side of the upper relatively narrow part of the key blade at a vertical level lying within a vertical range of the bitting portion of the key blade and extending in parallel to the longitudinal axis of the key blade and being confined longitudinally to the connecting portion of the key blade and confined also within the contour of or slightly laterally outside a rectangle of the key blank.

Abstract: A substantially flat key blade extends from a grip portion and has a connecting portion, a major longitudinal bitting portion and a free tip portion. The substantially flat key blade has a cross-sectional profile which, in the major longitudinal bitting portion, is confined within a rectangle having a height, measured in a vertical direction, being at least 2.5 times larger than a width thereof, and extends upwards in the vertical direction from a lower edge surface to an upper edge surface along a vertical mid-plane through the rectangle. A single upper part of the key blade has a relatively small lateral width being no more than 33% of the lower relatively wide part of the key blade and extends obliquely upwards at a relatively small inclinational angle in the interval 3° to 12° relative to a vertical plane.

Abstract: A key plug rotatable within a cylindrical bore of a cylinder lock. An upper relatively narrow part of a keyway has a small lateral width no more than 33% of the maximum width of a lower relatively wide part of the keyway and extends obliquely upwards along a first direction pointing away from a second lower side wall of a lower part and being inclined at a relatively small angle ?, in the interval 3° to 12°, relative to the vertical mid-plane. The sideways or lateral location of the upper relatively narrow part of the keyway is such that an imaginary downward extension thereof, substantially in a second direction opposite to the first direction down to an outer cylindrical contour of the key plug, will fall onto the outer cylindrical contour at a same second side of the vertical mid-plane and inside the second lower side wall of the keyway.

Abstract: A cylinder lock unit includes a housing having an upper part and a lower part that includes a cylindrical bore accommodating a rotatable key plug. A back region of the key plug has a minimum length of 50% of a total length of the key plug with an adjoining front region having a maximum length of 50% of the total length. The front region accommodates at least one side locking mechanism confined entirely within the front region of the key plug that includes a longitudinal row of at least two coded side locking tumblers each interacting with the lower part of the housing wherein each side locking mechanism is movable independently of each other with at least three different code positions for each coded side locking tumbler and a plurality of different code combinations for the at least two coded side locking tumblers in each of the longitudinal row.

Abstract: A lock and key combination providing extra code combinations. The lock has a housing and a cylindrical key plug with a keyway and at least side locking tumbler. The side locking tumbler has, at its rear side, a tongue which will fit into an associated recess in a side bar. The outer surface of the tongue is shaped as a groove between two vertical edge portions. One of these edge portions will make contact with the sidebar, adjacent to an entrance opening of the recess in the sidebar and thereby stop the tongue from entering into the rectangular recess if the side locking tumbler is rotationally misaligned. Because of this, it is possible to design the cylinder lock with a large number of predetermined code positions for each side locking tumbler. An associated key with a key blade having a wave-like side code pattern, will have, for each side locking tumbler, a selected one of a large number of predetermined different code positions.

Abstract: Cylindrical locks and more specifically a set of profile members in combination with a rotatable cylindrical key plug have a longitudinal keyway with a profile corresponding to an associated key. Each profile member is accommodated in an associated cavity in the key plug at a lateral side of the keyway so as to form a lateral part thereof. The profile members have a non-circular cross-section and are non-rotatably mounted in the associated cavities at a location adjacent to the keyway. A portion of each profile member has a profiled surface portion facing inwards toward the opposite lateral side of the keyway, the profiled surface portion having, in a plane being transversal to a longitudinal axis of the key plug, a specific profile section defining a local, lateral part of the keyway. An associated key, and a method to manufacture a cylindrical key plug with such profile members are also disclosed.

Abstract: A cylinder lock and key combination with a key slot and at least one dual tumbler assembly for locking a key plug against rotation. The dual tumbler assembly includes an outer pin movable elevationally in a chamber in the key plug, and an inner pin movable telescopically in a cylindrical bore in the outer pin. The outer pin is provided with at least one key contacting end portion for engagement with a first code portion of a key blade upon insertion thereof in the key slot. The inner pin is provided with at least one key contacting end portion, for engagement with a second code portion of the key blade. The key contacting end portions of the outer and inner pins of the tumbler assembly are located adjacent to each other at axially and radially well-defined code positions relative to a center-line of the tumbler assembly.

Abstract: An interchangeable cylinder lock core with a mechanism for transferring a torque to a lock unit when a key plug is rotated. The interchangeable cylinder lock core includes a shell having an upper part, provided with a central row of locking pins in associated cavities, and a lower part with a cylindrical bore accommodating the rotatable key plug. At least a part of the cylindrical bore extends through a rotatable retainer sleeve. A back region of the key plug has a minimum length with the adjoining front region of the key plug being located in front of the mechanism for transferring torque. The adjoining front region accommodates, in addition to the central row of locking pins, at least one side locking mechanism which is located in its entirety within the front region of the key plug and interacts with at least one recess in a fixed front end sleeve portion.

Abstract: A cylinder lock unit includes a housing having an upper part and a lower part that includes a cylindrical bore accommodating a rotatable key plug. A back region of the key plug has a minimum length of 50% of a total length of the key plug with an adjoining front region having a maximum length of 50% of the total length. The front region accommodates at least one side locking mechanism confined entirely within the front region of the key plug that includes a longitudinal row of at least two coded side locking tumblers each interacting with the lower part of the housing wherein each side locking mechanism is movable independently of each other with at least three different code positions for each coded side locking tumbler and a plurality of different code combinations for the at least two coded side locking tumblers in each of the longitudinal row.

Abstract: An interchangeable cylinder lock core with a mechanism for transferring a torque to a lock unit when a key plug is rotated. The interchangeable cylinder lock core includes a shell having an upper part, provided with a central row of locking pins in associated cavities, and a lower part with a cylindrical bore accommodating the rotatable key plug. At least a part of the cylindrical bore extends through a rotatable retainer sleeve. A back region of the key plug has a minimum length with the adjoining front region of the key plug being located in front of the mechanism for transferring torque. The adjoining front region accommodates, in addition to the central row of locking pins, at least one side locking mechanism which is located in its entirety within the front region of the key plug and interacts with at least one recess in a fixed front end sleeve portion.

Abstract: Cylindrical locks and more specifically a set of profile members in combination with a rotatable cylindrical key plug have a longitudinal keyway with a profile corresponding to an associated key. Each profile member is accommodated in an associated cavity in the key plug at a lateral side of the keyway so as to form a lateral part thereof. The profile members have a non-circular cross-section and are non-rotatably mounted in the associated cavities at a location adjacent to the keyway. A portion of each profile member has a profiled surface portion facing inwards toward the opposite lateral side of the keyway, the profiled surface portion having, in a plane being transversal to a longitudinal axis of the key plug, a specific profile section defining a local, lateral part of the keyway. An associated key, and a method to manufacture a cylindrical key plug with such profile members are also disclosed.

Abstract: A method and an apparatus for forming a profile groove in an elongated key blank having a key blade with opposite side surfaces. The profile groove is formed in a surface of the key blank by a punching or a broaching tool with at least one tooth. The punching or broaching tool is forced and guided longitudinally in parallel to the key blank so as to cut out the material of the key blank into the desired profile shape, corresponding to the cross-sectional shape of the at least one tooth. At the same time, the opposite side surfaces portions of the key blank are clamped or held firmly between opposite holding surfaces of a fixture, causing a firm abutment and retaining action on the longitudinal side surface portions of the key blank located adjacent to and all along the profile groove being formed.

Abstract: A cylinder lock and key combination is disclosed, comprising a key (10, 10?, 10?) with an elongate key blade (11), and a lock having a rotatable key plug (20) with a key slot (15) and at least one dual tumbler assembly (50) for locking the key plug against rotation. The dual tumbler assembly includes an outer pin (51) which is movable elevationally in a chamber in the key plug, and an inner pin (52) which is movable telescopically in a cylindrical bore (51a) in said outer pin. The outer pin is provided with at least one key contacting end portion (51b) for engagement with a first code portion (12b) of said key blade upon insertion thereof in the key slot of the lock, and the inner pin (52) is also provided with at least one key contacting end portion (52b), for engagement with a second code portion (12a) of the key blade.

Abstract: There is disclosed a method and an apparatus for forming a profile groove in an elongated key blank having a key blade with opposite side surfaces. The profile groove is formed in a surface of said key blank by means of a punching tool with at least one cutting tooth. The punching tool is forced and guided longitudinally in parallel to the key blank so as to cut out the material of said key blank into the desired profile shape, corresponding to the cross-sectional shape of said at least one cutting tooth. At the same time, the opposite side surfaces portions of the key blank are clamped or held firmly between opposite holding surfaces of a fixture, causing a firm abutment and retaining action on the longitudinal side surface portions of the key blank located adjacent to and all along the profile groove being formed. In this way, the key blank material adjacent to the profile groove is retained in a fixed state without being deformed during the punching operation.

Abstract: A cylinder lock and key combination includes a cylinder lock with a housing accommodating a rotatable key plug having a keyway. A row of tumbler pins are arranged in corresponding cylindrical chambers for engagement with coded V-cut bittings of an associated key. A longitudinal side bar with a row of inner projecting lugs each selectively registering with one or more recesses in the tumbler pins is slidingly journalled for transversal movement in the key plug. The coded V-cut bittings are at a respective angle and are located at a respective vertical level. The row of inner projecting lugs of the side bar is located above the top bitting level of the key blade. The tumbler pins are positioned in pin recesses located in a cylindrical outer surface and covered by a cylindrical wall part of an associated one of said cylindrical chambers, without communicating downwardly with the keyway.

Abstract: A cylinder lock with a rotatable key plug (112) having a profiled keyway (113,116), the keyway being configured to accommodate an elongated, substantially flat key blade (120) with a longitudinal groove (122). The keyway in the key plug has two opposite lateral sides and a profile rib (150) located at a substantially flat lateral side. The profile rib has a downwardly projecting tongue portion (161) configured to extend inside the profile groove (122) upon inserting the key (120) into the key plug (112) of the lock, and the tongue portion of the profile rib is extended downwardly into a lowermost, massive end portion (162) which has two opposite side surfaces (163,164) and a lowermost transverse end surface (165) which is substantially flat or slightly curved.

Abstract: A lock and key combination wherein at least one locking tumbler includes a key sensing portion, a body portion and a locking portion. A cavity, accommodating an associated locking tumbler, is larger than the contour of the body portion so as to permit a translatory as well as a rotary movement of the locking tumbler in a movement plane within the cavity. A code pattern on the key blade includes at least one wave-like guiding surface. When the key blade is inserted into the key slot, the locking tumbler is controlled by two mutually spaced formations, which engage with the wave-like guiding surface of the key blade, and is guided at opposite side surfaces by two associates walls of the cavity, to be retained precisely in the movement plane. The locking portion of the locking tumbler is movable to enable the locking mechanism to be released.

Abstract: A lock and key combination is disclosed, offering a large number of codes. The combination includes a lock (200) of the kind comprising a housing having a cylindrical bore, a cylindrical key plug (202) and a number of locking pins (205a-205g) in a row along a key plug axis for locking the key plug against rotation in the cylindrical bore, and a key (100) of the kind comprising a longitudinally extending, substantially flat key blade (102), with at least two longitudinally extending formations. The key blade comprises an upper edge portion having a first code pattern (103) and a lower, massive portion having a second code pattern (104).

Abstract: A profiled key for use in an associated cylinder lock provided with a rotatable key plug having a longitudinal keyway. The key has a substantially flat key blade with a longitudinally extending profile groove at a side surface thereof and at least one local recess adjacent to the profile groove. The local recess constitutes a locally expanded portion of the profile groove, and the locally expanded portion of the profile groove has a cross-section with two opposite, non-symmetrical side walls. The local recess will accommodate a blocking element in the lock, and permit full insertion of the key blade into the keyway.

Abstract: A cylinder lock and key combination is disclosed. The lock comprises a housing (30) having a cylindrical bore and a cylindrical key plug (33) being rotatably journalled in said cylindrical bore. The key plug has a longitudinal, profiled keyway (34) and means (1, 2) for locking the key plug against rotation in the cylindrical bore unless a correctly cut key is fully inserted into the keyway. The key blade (60) has a cross-sectional profile fitting into said keyway, and a profile groove (61) extending longitudinally along the key blade. The lock comprises a blocking mechanism with at least one blocking element (20), which is movable from a first blocking position, in which first projecting portion (21) of the cross-sectional profile of the blocking element extends outside the cross-sectional contour of said profile rib, into a second blocking position, in which a second projecting portion (22) extends outside the contour of the rib and is accommodated in a recess (70) in the key blade.