Breech locking system for self loading fire arms

US4594935A · kind A · utility

Inventor

• David E. Smith

Key dates

• Filing date: Mar 26, 1984
• Grant date: Jun 17, 1986
• Expiry date: Mar 26, 2004

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F41A21/484
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In a locked-breech, short recoil, pistol type fire arm, the breech block slide (B) is provided with a separate locking block (E) engageable with both the barrel (C) and the slide (B) and accommodated between the underside of the barrel (C) and the upper surface of a movable trigger guard (D). Hold open means (X) are provided operable in the absence of cartridges in a magazine (T) or in the breech to allow the slide (B) to be held in the fully retracted position and simultaneously to release the trigger guard (D) for limited forward and downward movement, the trigger guard being provided with means which on movement of the trigger guard cause the locking block (E) to disengage from the barrel, whereby the barrel can be removed without the need for further disassembly of the fire arm.