公开(公告)号：US5533850A

公开(公告)日：1996-07-09

申请号：US345414

申请日：1994-11-21

申请人： Tsuyoshi Ishihara ,  Hideyori Sakuragi ,  Kazuo Imanishi ,  Haruhiko Ishikawa

发明人： Tsuyoshi Ishihara ,  Hideyori Sakuragi ,  Kazuo Imanishi ,  Haruhiko Ishikawa

IPC分类号： F16B37/06 ,  F16B37/00

CPC分类号： F16B37/061

摘要： A welding nut comprising a main cylindrical body having a bearing surface end and an axial screw hole, a flange set around an outer perimeter of the body at the bearing surface end, and axially extending protrusions formed by partially pressed the flange in a direction towards the bearing surface. The protrusions extend axially beyond the bearing surface for resistance welding. At least one groove can be formed in the bearing surface between the screw hole and the protrusions. A guide tube having an external diameter smaller than an external diameter of the body can extend axially from the bearing surface. Screw threads can be bored continuously through the screw hole of the cylindrical body and an inner perimeter of the guide tube. A large number of serrated protrusions can be formed on an outer perimeter of the cylindrical body. Each of the protrusions can have an inner surface slanting radially outwardly and axially away from the bearing surface towards an outer edge of the flange. The protrusions can have equal width and can be formed along an outer edge of the flange on a side thereof adjacent the bearing surface. At least one groove can be formed on a lower end of each of the protrusions.

摘要翻译： 一种焊接螺母，包括具有轴承表面端和轴向螺纹孔的主圆柱体，在轴承表面端处围绕主体的外周围设置的凸缘，以及沿着朝向 承载面。 突出部分轴向延伸超过轴承表面进行电阻焊接。 在螺钉孔和突起之间的轴承表面中可以形成至少一个凹槽。 具有小于主体外径的外径的导向管可以从支承表面轴向延伸。 螺纹可以连续穿过圆柱体的螺孔和导管的内周。 可以在圆柱体的外周上形成大量的锯齿形突起。 每个突起可以具有从轴承表面朝向凸缘的外边缘径向向外和轴向地倾斜的内表面。 突起可以具有相等的宽度，并且可以沿着凸缘的与支承表面相邻的一侧的外边缘形成。 可以在每个突起的下端形成至少一个凹槽。

公开(公告)号：US3968093A

公开(公告)日：1976-07-06

申请号：US469443

申请日：1974-05-13

申请人： Masao Hasegawa ,  Akihisa Furuno ,  Haruhiko Ishikawa ,  Yasuo Ogawa

发明人： Masao Hasegawa ,  Akihisa Furuno ,  Haruhiko Ishikawa ,  Yasuo Ogawa

IPC分类号： C08F120/56 ,  C08F120/52 ,  C02C1/02 ,  C08F120/70

CPC分类号： C08F120/56

摘要： A process for producing a partially hydrolyzed polyacrylamide which has a high molecular weight and high water solubility and can be suitably used as a flocculant for water treatment and a size for paper manufacture comprising polymerizing an aqueous solution of an acrylamide monomer in the presence of an alkali metal hydroxide such as sodium hydroxide and boric acid, whereby a partial hydrolysis of the polymer formed is also conducted substantially simultaneously with the polymerization. In an additional embodiment, a maturing of the polyacrylamide produced can be conducted by continuing to heat the polymer solution to increase the hydrolysis percentage.

摘要翻译： 一种生产部分水解的聚丙烯酰胺的方法，其具有高分子量和高水溶性，并且可以适合用作水处理的絮凝剂和纸制造的尺寸，包括在碱的存在下聚合丙烯酰胺单体的水溶液 金属氢氧化物如氢氧化钠和硼酸，由此在聚合过程中基本上同时进行形成的聚合物的部分水解。 在另外的实施方案中，所生产的聚丙烯酰胺的成熟可以通过继续加热聚合物溶液以提高水解百分比来进行。