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1. 发明授权

US4702146A Gas pressure adjusting device in gas-operated auto-loading firearm 失效
标题翻译：气体自动加载枪支气压调节装置
公开(公告)号：US4702146A
公开(公告)日：1987-10-27
申请号：US827351
申请日：1986-02-07
申请人： Kouhei Ikeda , Kozo Iwata , Hisayoshi Masaki
发明人： Kouhei Ikeda , Kozo Iwata , Hisayoshi Masaki
IPC分类号： F41A5/26 , F41A5/18 , F41A5/28 , F41A7/04 , F41D5/08
CPC分类号： F41A5/28
摘要： A gas pressure adjusting device in the gas-operated mechanism of a gas-operated autoloading shotgun is in the form of a valve assembly comprising essentially a valve seat encompassing a stepped valve opening consisting of adjacent opening parts of different diameters, a valve body having first and second pressure-receiving surfaces and first and second sliding contact surfaces respectively fitted slideably in the valve opening parts, and a spring urging the valve body toward and into closed state against the valve seat. This valve assembly operates with a double action wherein the gas pressure tapped from the barrel bore acts initially on only the first pressure-receiving surface of the valve body and, upon exceeding a predetermined pressure, moves the valve body past a point where it acts also on the second pressure-receiving surface thereby to be released into the outside air. Thus, a low gas pressure produced by a low-base load is not released and positively operates the breech bolt, while a high pressure produced by a high-base load is partly released to prevent excessive impact on moving parts of the shotgun.
摘要翻译：气体自动加载霰弹枪的气体操作机构中的气体压力调节装置是阀组件的形式，阀组件基本上包括阀座，该阀座包括由不同直径的相邻开口部分组成的阶梯式阀开口，阀体具有第一以及第二受压面和第一滑动接触表面和第二滑动接触表面，其分别可滑动地装配在阀开口部分中，弹簧将阀体朝向阀座朝向和关闭状态。该阀组件以双重作用操作，其中从筒孔开启的气体压力最初仅起作用在阀体的第一压力接收表面上，并且在超过预定压力时，使阀体移动到其作用点在第二压力接收表面上，从而被释放到外部空气中。因此，由低基础负荷产生的低气压不会被释放，并且对后膛螺栓进行积极的操作，同时部分释放由高基础负荷产生的高压，以防止对霰弹枪的移动部件造成过度的冲击。

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