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US 5,845,525 AGranted
Cylinder lock and key combination with a guiding profile ridge in the lock
OwnerBo Wideninventor
Life of this patent
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Abstract
A cylinder lock and key combination, wherein the lock comprises a side profile ridge (60) disposed in the key slot (53) and having a relatively shallow recess (61), in which a projection (55) on a side tumbler (54) is vertically movable, and a continuously extending edge portion (62). The key has a relatively shallow coded groove (17), which cooperates with the side tumbler projections (55) of the lock, and a rectilinear, deeper profile groove (16), into which the edge portion (62) of the side profile ridge fits. This unitary edge portion secures a good guidance of the key when the latter is inserted into the lock.
Claims13
A cylinder lock and key combination, wherein the lock (50) comprises:
- a shell (51);
- a cylinder key plug (52) rotatably mounted in said shell and including at least one cavity (58) therein;
- a substantially flat key slot (53) extending longitudinally in said cylinder key plug for receiving said key;
- at least one side profile ridge (60) disposed in said cylinder key plug and projecting transversely into said key slot, said side profile ridge including an adjoining recess (61);
- and
- at least one side tumbler (54) which is movably mounted in an associated cavity (58) in said cylinder key plug and having a projection (55) which cooperates with said key, when said key is inserted into said key slot, said at least one side tumbler (54) being movable one of vertically and obliquely when the key is inserted into said key slot, said cavity (58) communicating with said key slot (53) via said adjoining recess (61) in said profile ridge (60), said recess (61) being dimensioned to accommodate said projection (55) of said at least one side tumbler (54) while permitting said one of vertical and oblique movement thereof;
- and wherein said key comprises:
- an elongated, substantially flat key blade extending between two planar side surfaces (11, 12), said key blade being insertable into said key slot and having at least one rectilinear side profile groove (16) corresponding to said side profile ridge and extending along an entire length of said key blade in one of said planar side surfaces;
- an elongated, longitudinally extending wave-like key code groove (17a, 17b) in said one side surface adjacent to said side profile groove, said wave-like key code groove (17a, 17b) cooperating with said projection (55) of said at least one side tumbler (54) and causing said projection (55) to move one of vertically and obliquely upon insertion of said key into said key slot of said cylinder lock;
- wherein said side profile groove (16) of said key blade is substantially deeper than said wave-like key code groove adjacent thereto, the depth being calculated transversely to said one side surface and the deepest portion thereof serving as a guiding bottom portion (16a);
- wherein said profile ridge has a continuously extending, unitary edge portion (62) serving to guide and support said key blade, upon insertion thereof into said key slot, while engaging with said guiding bottom portion (16a) of said side profile groove (16);
- and
- wherein said recess (61) in said profile ridge (60) is located transversely inside said unitary edge portion (62) so as to protect said projection (55) against manipulation and to permit movement of said projection (55) one of vertically and obliquely therein when inserting said key blade into said key slot of the lock.
10 more elements
A key comprising:
- an elongated, substantially flat key blade (10), extending between two planar side surfaces (11, 12), said key blade being adapted to be inserted in a key slot of a lock and having at least one rectilinear side profile groove (16) corresponding to a side profile ridge projecting into the key slot of the lock and extending along an entire length of said key blade in one of said planar side surfaces;
- and
- an elongated, longitudinally extending wave-like key code groove (17) in said one planar side surface adjacent to said side profile groove, said wave-like key code groove (17) being adapted to cooperate with a projection (55) of a side tumbler (54) in the lock upon insertion of the key in the key slot of the lock,
- wherein said side profile groove (16) of said key is substantially deeper than said wave-like key code groove (17) adjacent thereto, the depth being calculated transversely to said one planar side surface and the deepest portion thereof serving as a guiding bottom portion (16a) for guiding the key blade while engaging with a continuously extending, unitary edge portion (62) of said side profile ridge.
1 more element
A lock comprising:
- a shell (51);
- a cylinder key plug (52) rotatably mounted in said shell;
- a substantially flat key slot (53) extending longitudinally in said cylinder key plug and adapted to receive a substantially flat key blade of an associated key;
- at least one side profile ridge (60) disposed in the cylinder key plug and projecting transversely into said key slot, said side profile ridge including an adjoining recess (61);
- and
- at least one side tumbler (54) which is movably mounted in an associated cavity (58) in said cylinder key plug and having a projection (55) which cooperates with the associated key when the key is inserted into said key slot, said at least one side tumbler (54) being movable one of vertically and obliquely in relation to the key when the key is inserted into said key slot, said cavity (58) communicating with said key slot (53) via said adjoining recess (61) in said profile ridge (60), said recess (61) being dimensioned to accommodate said projection (55) of said at least one side tumbler (54) while protecting said protection against manipulation and permitting said one of vertical and oblique movement thereof,
- wherein said profile ridge has a continuously extending, unitary edge portion (62) serving to guide and support the key blade, upon insertion of the key blade into said key slot, while engaging with a bottom portion (16a) of a side profile groove (16) of the key blade;
- and
- wherein said projection (55) of said at least one side tumbler (54) extends transversely into said recess (61) in said profile ridge (60), and being one of vertically and obliquely movable inside said unitary edge portion when inserting the key blade into said key slot of the lock, while making contact with an elongated, longitudinally extending wave-like key code groove of the key.
6 more elements
Dependencies are inferred from the claim text.