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1. 发明授权

US4263249A Method for producing reinforced plastic tubular body having annular grooves, and mold therefor 失效
标题翻译：具有环形槽的增强塑料管状体的制造方法及其模具
公开(公告)号：US4263249A
公开(公告)日：1981-04-21
申请号：US052915
申请日：1979-06-26
申请人： Masakatu Mayumi , Kenji Mitooka , Sigeharu Fujiwara , Takesi Okuyama
发明人： Masakatu Mayumi , Kenji Mitooka , Sigeharu Fujiwara , Takesi Okuyama
IPC分类号： B29C57/00 , B29C33/48 , B29C53/82 , B29C67/00 , B29C70/06 , F16L9/16 , B28B7/06
CPC分类号： B29C53/824 , B29C33/485 , F16L9/16
摘要： A mold for the production of a reinforced plastic tubular body having an annular groove such as a pipe coupling, the mold having a mold body and detachably mounted on a predetermined position thereof, an annular groove former consisting of a surface layer of an elastic material and a core covered with the surface layer. The reinforced plastic tubular body is produced by forming a layer of a molding material around the aforesaid mold, curing the layer of molding material, separating the mold body from the cured layer of molding material, and then separating the annular groove former from the cured layer of molding material by removing the core and then removing the surface layer.
摘要翻译：一种用于生产具有诸如管接头的环形槽的增强塑料管状体的模具，所述模具具有模具本体并且可拆卸地安装在其预定位置上，环形槽形成器由弹性材料的表面层和覆盖表层的核心。加强塑料管体通过在上述模具周围形成一层成型材料，固化成型材料层，将模体与固化的成型材料层分离，然后将环形槽形成器与固化层分离通过去除芯并且然后去除表面层来模制材料。

2. 发明授权

US4296954A Pipe coupling and pipe joint connection 失效
标题翻译：管接头和管接头连接
公开(公告)号：US4296954A
公开(公告)日：1981-10-27
申请号：US74806
申请日：1979-09-11
申请人： Kiyoshi Fujimaki , Yoshiaki Bando , Takesi Okuyama , Tutomu Hashimoto
发明人： Kiyoshi Fujimaki , Yoshiaki Bando , Takesi Okuyama , Tutomu Hashimoto
IPC分类号： F16L15/04 , F16L15/06 , F16L17/06
CPC分类号： F16L15/003 , F16L15/008 , F16L15/04
摘要： A pipe coupling has a main body including (a) a threaded portion adapted for threaded engagement with an inside-coated pipe having a mating threaded end portion, (b) an annular groove and (c) an annular projection, the members (a), (b) and (c) being located on the inside circumferential surface of the main body in this recited order from each open end of the main body toward the central portion thereof, a short cylindrical body having one end abutting the annular projection and being mounted within the main body, and an annular packing mounted within the space defined by the threaded portion (a), said annular groove and the peripheral surface of the cylindrical body. A pipe joint connection is provided by threadedly engaging inside-coated pipes with the threaded portions of the coupling. The pipe coupling of the invention permits a leakage-free pipe joint connection on the job by simply threading inner-coated steel pipes and threadedly connecting these pipes through the coupling.
摘要翻译：管接头具有主体，该主体包括：（a）螺纹部分，其适于与具有匹配螺纹端部的内涂管相啮合，（b）环形槽和（c）环形突起，所述构件（a），（b）和（c）从本体的每个开口端朝向其中心部分按照所述顺序位于主体的内周面上;一个短圆柱体，其一端邻接环形突起，并且是安装在主体内，以及安装在由螺纹部分（a），所述环形槽和圆柱体的外周表面限定的空间内的环形填料。管接头连接通过将联接件的螺纹部分与内涂管道螺纹接合而提供。本发明的管接头通过简单地穿线内涂钢管并通过联接器将这些管道螺纹连接，从而允许在工作中无泄漏的管接头连接。

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