| 摘要 |
<p>The indicator includes a cup housing, a cylindrical indicator body which can be removably coupled to the valve element, and a ring-like display element having outside and inside surfaces connected to outside portion of the indicator body by device which transforms angular movement of the indicator body into a rectilinear displacement of the ring-like display element. The movement transforming device comprises a sinusoidal slot defined on the indicator body and a pair of pins fixedly attached to the inside surface of the display element and slidably engaging in the sinusoidal slot. The display element is located inside a ring-like fixed body encompassed by the cup housing of the indicator which further comprises rotation preventing device for preventing the display element from rotating, and includes a pair of pegs fixedly attached to the outside surface of the display element and each engaging in a guide slot defined in the ring-like fixed body. The cup housing of the indicator is made of an optically clear material, and has a flange including through-holes for coupling the housing to the outer casing of the valve element.</p> |
