Low Profile Deadbolt With Offset Lock Cylinder
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Solution Overview
Problem
Existing deadbolt assemblies project the lock cylinder outwardly from the door due to axial alignment, which is aesthetically undesirable and vulnerable to vertical attacks, as they occupy the entire bore space, leaving no room for the lock cylinder.
Innovation Solution
A low-profile deadbolt assembly design where the lock cylinder is offset from the latch assembly, allowing it to be partially or fully received within the door's bore, utilizing a first actuator assembly with a lock cylinder and tailpiece gear, and a second actuator assembly with a latch blade gear, enabling rotation and movement of the bolt between retracted and extended positions without projecting outwardly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lock cylinder is axially aligned with the latch assembly's spindle, then the lock cylinder can be mounted, but it projects out significantly from the exterior door surface
Solution Approach 1:
The patent repositions the lock cylinder from axial alignment with the spindle to a lateral offset position, allowing the cylinder to be mounted in a different spatial dimension within the bore. This dimensional change enables the cylinder to clear the spindle path while remaining recessed in the door surface.
Solution Approach 2:
The lock cylinder is nested within the door bore space, utilizing the available internal volume. The cylinder is positioned laterally offset and recessed, effectively nesting it within the door thickness rather than having it protrude from the exterior surface.
2Adaptability or versatility
If the lock cylinder projects out significantly from the exterior door surface, then the lock cylinder can accommodate the torque blade, but it creates aesthetic concerns and vulnerability to vertical attacks
Solution Approach 1:
The torque blade is repositioned from a lateral insertion path to an axial path through the lock cylinder. This dimensional change allows the torque blade to be transmitted through the cylinder along its axis, enabling the cylinder to be recessed without compromising torque transmission capability.
Solution Approach 2:
The lock cylinder acts as an intermediary element that receives the torque blade axially and transmits it to the spindle. This intermediary configuration allows the cylinder to be positioned recessed in the door while still effectively transmitting rotational force to operate the latch assembly.
3Ease of operation
If the latch assembly is sized to take up much of the space in the bore, then the spindle can be centered and operated, but there is no remaining room for the lock cylinder
Solution Approach 1:
The lock cylinder is positioned in a different spatial arrangement within the bore, laterally offset from the spindle's axial path. This dimensional repositioning allows both the spindle assembly and lock cylinder to coexist within the bore without interfering with each other's operation.
Solution Approach 2:
The internal bore space is segmented into distinct functional zones: one for the spindle and latch assembly operation, and another laterally offset zone for the lock cylinder. This spatial segmentation allows both components to occupy the bore simultaneously without conflict.
Data Source
AI summary
A deadbolt assembly with a latch assembly and a lock cylinder. The deadbolt assembly includes a first torque blade longitudinally extending along a first axis and a second torque blade longitudinally extending along a second axis. The second torque blade is operatively coupled with the latch assembly to actuate the bolt between the retracted position and the extended position. The deadbolt assembly includes a geared arrangement operatively coupling the first torque blade and the second torque blade. The gear arrangement is configured to apply rotational movement of the first torque blade to the second torque blade.