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1. 发明授权

US4177825A Self-grinding valve mechanism 失效
标题翻译：自磨阀门机构
公开(公告)号：US4177825A
公开(公告)日：1979-12-11
申请号：US857644
申请日：1977-12-05
申请人： Millard B. Crawford
发明人： Millard B. Crawford
IPC分类号： F16K1/02 , F16K1/48 , F16K29/00 , B24B15/02
CPC分类号： F16K1/485 , F16K29/00 , Y10T137/4294
摘要： Improved self-grinding valve is provided with corrosion-protecting features and an improved floating coupling between the valve stem and valve disc whereby, when the valve disc is brought into contact with its seat, a selected rotation of the valve disc will produce a grinding of the seat, followed by a disengagement of the valve stem from the valve disc. When this disengagement takes place, the full torque load of the stem can be imposed upon the valve disc to obtain the desired seating of the same. The valve stem is advantageously comprised of improved telescoping and theadedly engaged sections that operate to relieve the forces used to hold the valve disc against the seat upon the initial opening of the valve whereby the amount of torque required to ultimately rotate and free the valve disc from its seat is materially reduced and seizing of the valve disc relative to its seat avoided.
摘要翻译：改进的自磨阀具有腐蚀保护特征以及阀杆和阀盘之间的改进的浮动联接，由此当阀盘与阀座接触时，阀盘的选定旋转将产生磨削然后将阀杆从阀盘上脱开。当这种脱离发生时，杆的全部扭矩负载可以施加在阀盘上以获得其期望的座位。阀杆有利地包括改进的伸缩和弯曲接合部分，其操作以在阀初始打开时减轻用于将阀盘保持在阀座上的力，由此最终使阀盘旋转和释放所需的扭矩量其阀座被大大地减少，阀盘相对于其阀座的卡住被避免。

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