Firearm Trigger Mechanism

What is this patent about?

’715 is related to the field of firearms, specifically bolt-action precision rifles. These rifles often use a manually operated bolt for loading and extracting cartridges. A common challenge is achieving a precise and consistent trigger pull, which is crucial for accuracy. Existing trigger mechanisms can sometimes lack the desired mechanical advantage or feel, leading to inconsistencies in shot placement.

The underlying idea behind ’715 is to use a compound lever system within the trigger mechanism to enhance mechanical advantage and control. This is achieved by introducing a trigger member that pivots relative to a first member, which in turn acts on the sear. The trigger member's bearing arm makes contact with the receiver, creating a pivoting action that requires less force from the user to disengage the sear and release the firing element.

The claims of ’715 focus on a compound lever firearm trigger mechanism. This mechanism includes a first member pivotally attached to the receiver with a lever arm connected to a sear. The sear is movably mounted and spring-biased. A trigger member is pivotally attached to the first member's lever arm, featuring a trigger blade arm and a bearing arm. Pulling the trigger blade causes the trigger member to pivot, moving the bearing arm against the receiver and pivoting the lever arm to release the firing element.

In practice, pulling the trigger blade arm initiates a chain reaction. The trigger member pivots, leveraging the bearing arm against the receiver. This leverage amplifies the force applied by the user, making it easier to overcome the sear's resistance. The sliding fulcrum created by the bearing arm against the receiver is a key element in achieving the desired mechanical advantage and a smooth, consistent trigger pull.

This design differentiates itself from traditional trigger mechanisms by using a compound lever system with a sliding bearing surface . Instead of a direct connection between the trigger and sear, the intermediate trigger member and its interaction with the receiver create a more refined and controllable trigger action. This can lead to improved accuracy and consistency, especially in precision shooting scenarios where a predictable trigger pull is essential.