公开(公告)号：US5720380A

公开(公告)日：1998-02-24

申请号：US565142

申请日：1995-12-01

Applicant: James R. Graham II

Inventor： James R. Graham II

IPC: F16K17/16 ,  F16K17/40

CPC classification number: F16K17/1613

Abstract: A reverse buckling disk has an annular retaining flange for mounting in a flow passageway. The annular retaining flange is integrally formed with a central domed portion having a concave side and a convex side. The disk has a predetermined material thickness and domed height for establishing a rated pressure at which the central domed portion reverse buckles. A metal cutting element or knife is fixedly attached to at least a portion of the convex side of the central domed portion in surface-conforming relationship. The metal cutting element has a thickness greater than the thickness of the disk material and has at least one knife point thereon for cutting the disk as the central domed portion reverse buckles at the rated pressure.

Abstract translation: 反向弯曲盘具有用于安装在流动通道中的环形保持凸缘。 环形保持凸缘与具有凹面和凸面的中心圆顶部一体地形成。 盘具有预定的材料厚度和圆顶高度，用于建立中心圆顶部分反向弯曲的额定压力。 金属切割元件或刀以表面一致的关系固定地附接到中心圆顶部分的凸侧的至少一部分。 金属切割元件的厚度大于圆盘材料的厚度，并且在额定压力下，当中心圆顶部分反向弯曲时，在其上具有用于切割圆盘的至少一个刀尖。

公开(公告)号：US5661277A

公开(公告)日：1997-08-26

申请号：US566312

申请日：1995-12-01

Applicant: James R. Graham, II

Inventor： James R. Graham, II

IPC: H01H35/34 ,  H01H35/40

CPC classification number: H01H35/40 ,  H01H35/34 ,  Y10T137/8326

Abstract: A differential pressure flow sensor for use in a flow passageway of very low pressure flow lines and utilizing at least first and second conductive membranes in superimposed relationship having center portions constructed to create a discontinuity to allow a predetermined flow rate therethrough. A conductive strip is in juxtaposed relationship with the superimposed membranes and has a normally closed switch position. When the flow in the flow passageway exceeds the predetermined flow rate, the pressure against the flexible membranes opens the switch of the conductive strip and provides an electrical indication of the open switch.

Abstract translation: 一种差压流量传感器，用于非常低压流动管线的流动通道，并且以叠加关系利用至少第一和第二导电膜，其中心部分被构造成产生不连续性以允许通过其中的预定流速。 导电带与叠加的膜并列关系并且具有常闭开关位置。 当流动通道中的流量超过预定流量时，针对柔性膜的压力打开导电条的开关并提供打开开关的电指示。