Jul 8, 2025

US12352516 - Upper receiver with bolt biasing member

A firearm is disclosed. The firearm can include an upper receiver that includes a bolt. The bolt can include at least one displaceable biasing member that is configured to bias the bolt in a forward state when the at least one biasing member is in an initial state. The bolt can also include a locking wedge that is configured to bias the at least one displaceable biasing member in the initial state. The at least one displaceable biasing member is configured to be displaced from the initial state to a displaced state when a sufficient amount of force is exerted on the at least one displaceable biasing member from the bolt so that the bolt can transition from the forward state to a backward state.

Assignee: Sven Jonsson
Inventors: Sven Jonsson
Filing date: 2024-06-05

firearmupper receiverboltbiasing member

The patent describes a firearm upper receiver featuring a bolt with a displaceable biasing member that maintains the bolt in a forward position until sufficient force is applied. Additionally, a locking wedge is included to keep the biasing member in its initial state, allowing for the bolt’s transition to a backward state when needed.

Claim 1

A firearm comprising: an upper receiver including a bolt, the bolt including: at least one displaceable biasing member that is configured to bias the bolt in a forward state when the at least one biasing member is in an initial state; and a locking wedge that is configured to bias the at least one displaceable biasing member in the initial state, wherein the at least one displaceable biasing member is configured to be displaced from the initial state to a displaced state when a sufficient amount of force is exerted on the at least one displaceable biasing member from the bolt so that the bolt can transition from the forward state to a backward state. an upper receiver including a bolt, the bolt including: at least one displaceable biasing member that is configured to bias the bolt in a forward state when the at least one biasing member is in an initial state; and a locking wedge that is configured to bias the at least one displaceable biasing member in the initial state, wherein the at least one displaceable biasing member is configured to be displaced from the initial state to a displaced state when a sufficient amount of force is exerted on the at least one displaceable biasing member from the bolt so that the bolt can transition from the forward state to a backward state. at least one displaceable biasing member that is configured to bias the bolt in a forward state when the at least one biasing member is in an initial state; and a locking wedge that is configured to bias the at least one displaceable biasing member in the initial state, wherein the at least one displaceable biasing member is configured to be displaced from the initial state to a displaced state when a sufficient amount of force is exerted on the at least one displaceable biasing member from the bolt so that the bolt can transition from the forward state to a backward state.

Google Patents

https://patents.google.com/patent/US12352516

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12352516