Trigger device for a semi-automatic handgun

What is this patent about?

’329 is related to the field of trigger mechanisms for semi-automatic firearms, specifically focusing on systems that enable controlled, high-speed bursts. Traditional burst-fire mechanisms often release a fixed number of rounds automatically once the trigger is pulled, making it difficult for a shooter to interrupt the sequence or precisely meter the shots. The invention seeks to bridge the gap between single-fire precision and rapid-fire volume by providing a mechanical feedback loop that requires distinct trigger progression for each shot in a sequence.

The underlying idea behind ’329 is to integrate a multi-stage mechanical gate directly into the trigger’s path of travel, ensuring that each shot in a burst is tied to a specific pressure point. Rather than using a clockwork-style timer or a free-running sear, the system employs a sear that acts as a control element with multiple physical steps or teeth. By requiring the shooter to pull the trigger through successive resistance stages, the invention allows for a rapid-fire sequence that remains under the shooter's manual control, permitting an immediate halt to firing at any point between rounds.

The claims of ’329 focus on a trigger assembly where a sear functions as a control element positioned between the trigger and the firing component. The core of the claim is the specific mechanical linkage: a locking element is mounted on a first axis, while a swivel-mounted pawl is attached to that locking element on a separate, second axis. This pawl interacts with at least two distinct locking or control faces on the sear, creating a metered release system where the movement of the sear sequentially trips the pawl to release the striker or firing pin.

In practice, as the shooter pulls the trigger, the sear moves and its first tooth engages the pawl, which pivots the locking element to release the striker for the first shot. As the firearm's action cycles, the striker is reset, but the sear has already advanced. The shooter must continue the trigger pull to bring the second tooth into contact with the pawl to initiate the next shot. This creates a stepped engagement where the mechanical energy of the trigger pull is translated into discrete release events, rather than a single continuous release.

This approach differs from prior art by eliminating the 'all-or-nothing' nature of traditional burst limiters. By mounting the pawl directly on the locking element, the invention creates a compact, modular unit that can be retrofitted into existing handgun frames. The use of a multi-toothed sear or a sliding guide with deflectors ensures that the timing of each shot is determined by the physical displacement of the trigger, providing the shooter with tactile feedback and the ability to cease fire instantly by simply stopping the trigger's rearward motion.