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US 12,037,811 B2Granted
Pick-resistant pin tumbler lock assembly
OwnerAndrew Magillinventor
Life of this patent
Estimating the term…
Abstract
A pick-resistant lock assembly may include a housing having a cylindrical opening. The cylindrical opening may have a centerline. The housing may include a plurality of pin cavities intersecting the cylindrical opening. A plug may be rotatably mounted in the cylindrical opening. The plug may include a keyway and a plug axis. A slide bar pocket may be formed within the housing. The lock assembly may include a pin verification mechanism having a slide bar in the slide bar pocket. The pin verification mechanism may be concealed within the housing and may be inaccessible to an attacker inserting a hand tool through the keyway. Other examples may be described and claimed.
Claims20
A pick-resistant lock assembly comprising:
- a housing comprising a cylindrical opening and a plurality of pin cavities formed in the housing, the plurality of pin cavities intersecting the cylindrical opening and being substantially orthogonal to a centerline of the cylindrical opening;
- a plug rotatably mounted within the cylindrical opening, the plug comprising a plug axis and a keyway extending along the plug axis, the plug comprising a plurality of pin openings extending from the keyway through an outer surface of the plug, each pin opening corresponding to and aligned with one of the plurality of pin cavities when the plug is in a home position;
- a slide bar pocket concealed within the housing, the slide bar pocket separated from the cylindrical opening by a separating portion of the housing, the slide bar pocket intersecting each of the plurality of pin cavities, the slide bar pocket at least partially surrounding each of the plurality of pin cavities, and
- a pin verification mechanism concealed within the housing and comprising a slide bar, the slide bar positioned within the slide bar pocket, the slide bar comprising a plurality of clearance portions, each clearance portion corresponding to one of the plurality of pin cavities when the plug is in a home position,
- wherein the pin verification mechanism converts rotational movement of the plug into translational movement of the slide bar to facilitate pin verification before allowing the plug to rotate and unlock the lock assembly,
- wherein the slide bar is configured to slide within the slide bar pocket from the home position to a pin verification position when the plug is rotated, wherein the plurality of clearance portions are misaligned with the plurality of pin cavities and the slide bar is at least partially obstructing each of the plurality of pin cavities when the slide bar is in the pin verification position.
3 more elements
A lock assembly comprising:
- a housing comprising a plug opening that is generally cylindrical, a plurality of pin cavities intersecting the plug opening and being orthogonal to a centerline of the plug opening, a cam pin cavity intersecting the plug opening and being orthogonal to the centerline of the plug opening, and a slide bar pocket intersecting a centerline of each of the plurality of pin cavities and intersecting the cam pin cavity;
- a plug rotatably mounted in the plug opening, the plug comprising a plug axis, a plurality of pin openings arranged in a row and each having a centerline substantially orthogonal to the plug axis, a cam surface on an exterior surface of the plug, and a keyway extending from a front portion of the plug toward a rear portion of the plug and intersecting each of the plurality of pin openings;
- a cam pin positioned in the cam pin cavity, the cam pin having a first end and a second end, the first end in contact with the cam surface, the second end having a first beveled surface;
- and
- a slide bar in the slide bar pocket, the slide bar comprising a second beveled surface in contact with the first beveled surface of the cam pin, a plurality of clearance holes each having a diameter equal to or greater than a diameter of a corresponding pin cavity, and a slot connecting the plurality of clearance holes, the slot having a width less than the diameter of each of the plurality of pin cavities,
- wherein rotating the plug from a home position to a pin verification position causes the cam surface to rotate about the plug axis and the cam pin to ride on the cam surface and move radially outward from the plug axis within the cam pin cavity causing the first beveled surface to press against the second beveled surface thereby moving the slide bar linearly from the home position to the pin verification position.
3 more elements
A pick-resistant lock assembly comprising:
- a housing comprising an opening configured to receive a rotatable plug, a slide bar pocket concealed within the housing and separated from the opening by a separating portion of the housing, a pin cavity intersecting the slide bar pocket and extending through the separating portion to the opening;
- and
- a pin verification mechanism concealed in the housing and comprising a slide bar, the slide bar positioned in the slide bar pocket, wherein the slide bar is configured to move between a home position and a pin verification position within the slide bar pocket in response to rotation of the plug, wherein the slide bar partially obstructs the pin cavity when the slide bar is in the pin verification position.
Dependencies are inferred from the claim text.