Pivoting Weapon Anti-Cant Indicator for Field-of-View Clearance

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Solution Overview

Problem

Existing firearms often suffer from canting, which affects the alignment of the sight with the bore, leading to inaccurate aiming.

Innovation Solution

An anti-cant indicator assembly with a pivot connection allowing a level vial to move between operational and stowed positions, featuring a pivot connection and retaining mechanism to indicate vertical orientation, and adjustable mounting for precise calibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a level vial is mounted on the weapon to indicate vertical orientation, then the user can detect weapon canting, but the indicator may interfere with the user's field of view or weapon operation when deployed

Engineering Contradiction:
Improveweapon orientation detectionVSAvoidweapon operation
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The level vial is mounted on a pivot connection that allows it to rotate between a deployed position (where it indicates vertical orientation) and a stowed position (where it clears the field of view and does not interfere with operation). This dynamic positioning resolves the contradiction by making the indicator visible when needed and invisible when not needed.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The level vial is positioned laterally offset from the weapon's longitudinal axis and can rotate about a pivot axis perpendicular to the sighting axis. This places the indicator in a different spatial dimension (lateral rather than longitudinal), allowing it to indicate orientation without blocking the forward field of view or interfering with weapon operation along the longitudinal axis.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Loss of information

If the level vial is always in the operational position to provide continuous orientation indication, then the user can constantly monitor weapon canting, but the indicator will permanently obstruct part of the user's field of view

Engineering Contradiction:
Improveorientation information availabilityVSAvoidfield of view
Core Design Contradiction:
Loss of informationVSArea of stationary object

Solution Approach 1:

The pivot connection enables the level vial to dynamically switch between deployed and stowed positions. When the user needs orientation information, the vial is in the deployed position providing visual indication. When the user needs an unobstructed field of view, the vial rotates to the stowed position, eliminating the visual obstruction while maintaining all functional capabilities.

Inventive Principle:
Principle #15Dynamics

3Stability of the object's composition

If the level vial is rigidly mounted to the weapon to ensure stable indication, then the indicator remains fixed relative to the weapon, but the user cannot adjust the indicator's orientation for different weapon configurations or calibration needs

Engineering Contradiction:
Improveindicator stabilityVSAvoidindicator orientation adjustment
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The pivot connection provides rotational freedom allowing the level vial to be oriented at different angles relative to the weapon. The retainer mechanism allows the user to lock the vial at any desired orientation angle. This combination provides both stability (when locked) and adaptability (ability to change orientation), resolving the contradiction between rigid mounting and adjustable mounting.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The user can independently adjust and reposition the level vial to the desired orientation and lock it in place using the retainer mechanism. This self-adjusting capability eliminates the need for complex pre-calibration or specialized tools, allowing the indicator to adapt to different weapon configurations and user preferences while maintaining stable indication once positioned.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables users to accurately determine and correct weapon canting, ensuring proper alignment for improved aiming accuracy.

Implementation Method 1

a level including a vial containing a bubble

Methodology Applied
Scientific EffectGravitation: Gravitation

Data Source

PatentUS12352531B2Weapon anti-cant indicator
Publication Date: 2025.07.08 AOB PRODUCTS CO
  • US12352531B2 patent drawing
  • US12352531B2 patent drawing
  • US12352531B2 patent drawing

AI summary

An anti-cant indicator assembly, components thereof, and associated methods. The anti-cant indicator assembly indicates the orientation of a weapon with respect to vertical. The anti-cant indicator assembly includes a mount configured to mount to the weapon, a level including a vial containing a bubble and a pivot connection connecting the level to the mount. The pivot connection is configured to permit movement of the level with respect to the mount about the pivot connection between an operational position in which the bubble can be referenced by the user for indicating orientation of the weapon with respect to vertical, and a stowed position different from the operational position. The pivot connection can include a retainer configured to releasably retain the level in at least one of the operational position or the stowed position. The level can be selectively movable with respect to the mount to calibrate the anti-cant indicator.