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US 11,447,975 B1Granted
Lock system with key and auxiliary pin tumbler stack
AssigneeKaba Ilco Corp.
InventorsCharles W. Eden, Thomas H. Boone, Thomas Michael Phillips, Sr.
Life of this patent
Estimating the term…
Abstract
Locking systems allow for the unlocking and locking of, e.g., doors, containers, and enclosures. Lock cylinders are coded to specific keys, and often there is a desire to have a key be able to access a subset of lock cylinders. Keys are coded using bitting to gain access to specific lock cylinders. It is with respect to these and other general considerations that embodiments have been described.
Claims26
A key comprising:
- a bow;
- a blade extending longitudinally from the bow along a key blade centerline to a tip, the blade having a pair of spaced upper and lower edges which are interconnected by opposite side faces, the blade further comprising:
- a tapered upper protrusion disposed along the upper edge with a circular cross-section, the upper protrusion extending generally orthogonal to the key blade centerline, the upper protrusion longitudinally intermediate the tip and the bow, wherein the upper extent of the upper protrusion defines a first height relative to the key blade centerline;
- a first slot disposed adjacent the protrusion, the first slot disposed longitudinally intermediate the protrusion and the bow, wherein a bottom extent of the first slot defines a second height relative to the key blade centerline, the first height greater than the second height;
- a land positioned along the upper edge, the protrusion separating the land and the first slot, the land defines a third height relative to the key blade centerline, the third height greater than the second height and less than the first height;
- and
- a second slot disposed adjacent the protrusion, the second slot disposed longitudinally intermediate the protrusion and the tip.
4 more elements
A key, comprising:
- a bow;
- a blade extending longitudinally from the bow along a key blade centerline to a tip, the blade having a pair of spaced upper and lower edges which are interconnected by opposite side faces, the blade further comprising:
- a tapered upper protrusion disposed along the upper edge with a circular cross-section, the upper protrusion extending generally orthogonal to the key blade centerline, the upper protrusion longitudinally intermediate the tip and the bow;
- a first slot disposed along the blade on a first side of the protrusion, the first slot disposed longitudinally intermediate the protrusion and the bow, wherein the bottom extent of the first slot defines a first height relative to the key blade centerline;
- a second slot disposed along the blade on a second side of the protrusion, wherein the bottom extent of the second slot defines a second height relative to the key blade centerline, the second height is greater than the first height;
- and
- the first height is positioned closer to the key blade centerline than any other part of the upper edge.
4 more elements
A key blank, comprising:
- a bow;
- a blade extending from the bow in a first direction along a key blade centerline to a tip, the blade having a pair of spaced upper and lower edges which are interconnected by opposite side faces, the upper edge having an upper edge width, the blade further comprising:
- a protrusion disposed along the upper edge with a circular cross-section, the protrusion extending in a second direction generally orthogonal to the key blade centerline, the protrusion positioned longitudinally intermediate the tip and the bow;
- a slot disposed adjacent the protrusion, the slot disposed longitudinally intermediate the protrusion and the bow, the slot defined by a bottom extent, a front wall extending upward to the protrusion, and a rear wall positioned between the front wall and the bow, the rear wall substantially transverse the key blade centerline, the rear wall has a rear wall width extending in a third direction, the third direction orthogonal to the first direction and the second direction;
- and
- the rear wall width is less than the upper edge width.
3 more elements
A key, comprising:
- a bow;
- a blade extending longitudinally from the bow along a key blade centerline to a tip, the blade having a pair of spaced upper and lower edges which are interconnected by opposite side faces, the upper edge having an upper edge width, the blade further comprising:
- a protrusion disposed along the upper edge with a circular cross-section, the protrusion extending generally orthogonal to the key blade centerline, the protrusion positioned longitudinally intermediate the tip and the bow;
- a slot disposed between the protrusion and the bow, the slot defined by a bottom extent, a front wall extending upward from the bottom extent toward the protrusion, and a rear wall positioned between the front wall and the bow;
- and
- the rear wall is substantially planar in a vertical direction.
3 more elements
Dependencies are inferred from the claim text.