| 发明名称 | Rotary valve position indicator | ||
| 摘要 | A rotary valve position indicator is disclosed. An example apparatus includes an actuator housing defining an explosion-proof enclosure boundary. An actuator output shaft has a first shaft portion and a second shaft portion. The first shaft portion is partially disposed within the explosion-proof enclosure boundary, and the second shaft portion is disposed outside of the explosion-proof enclosure boundary. A visual position indicator is disposed on the second shaft portion of the actuator output shaft and indicates the rotational position of the actuator output shaft relative to the actuator housing. | ||
| 申请公布号 | US9618136(B2) | 申请公布日期 | 2017.04.11 |
| 申请号 | US201314027661 | 申请日期 | 2013.09.16 |
| 申请人 | Fisher Controls International LLC | 发明人 | Bell Brandon Wayne |
| 分类号 | F16K37/00;F16K1/22 | 主分类号 | F16K37/00 |
| 代理机构 | Hanley, Flight & Zimmerman, LLC | 代理人 | Hanley, Flight & Zimmerman, LLC |
| 主权项 | 1. An apparatus, comprising: an actuator housing defining an explosion-proof enclosure boundary; an actuator output shaft having a first shaft portion and a second shaft portion, the first shaft portion partially disposed within the explosion-proof enclosure boundary, and the second shaft portion disposed outside of the explosion-proof enclosure boundary; an O-ring seal at least partially defining the explosion-proof enclosure boundary and disposed in the actuator housing, the O-ring seal to directly contact an outer diameter of the actuator output shaft, the O-ring seal defining the first and second shaft portions, wherein the second shaft portion defines an indicating portion of the actuator shaft; a visual position indicator; and a scale aligned with the visual position indicator to indicate a rotational position of the actuator output shaft relative to the actuator housing. | ||
| 地址 | Marshalltown IA US | ||