The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2012
Filed:
Jul. 07, 2009
Joseph E. Alves, Springfield, OR (US);
Joseph E. Alves, Springfield, OR (US);
Other;
Abstract
A hammer spring assembly comprises a spring and a member operatively coupling the spring and a hammer of a firearm when the hammer spring assembly is connected to a firearm. The hammer is biased by the spring to rotate forward toward a cartridge or firing pin. The spring exerts a bias force on the member in the forward direction, which urges the member against a curved rearward surface of the hammer at a hammer contact point. As the hammer rotates rearward, the hammer contact point moves along the rearward hammer surface so as to cause a desired variation of an effective lever arm about the hammer pivot point of the bias force exerted on the hammer. Methods comprise connecting the hammer spring assembly to a firearm, or providing the hammer spring assembly and instructing a user to connect it to a firearm.