<p>A filter change indicator includes two indicators visible through a window. The first indicator is disposed in the viewing window in a fixed position. The second indicator covers the first indicator in a first position and is moveable relative to the first indicator to a second position revealing the first indicator. The filter change indicator also includes a spring and flexible diaphragm arranged such that changes in the pressure of a fluid system moves the second indicator to expose the first indicator to provide a visual indication of filter occlusion.</p>
申请公布号
WO2007030608(A2)
申请公布日期
2007.03.15
申请号
WO2006US34838
申请日期
2006.09.08
申请人
STANADYNE CORPORATION;WILLIAMS, MICHAEL, J.;FERREIRA, DAVID;VARDION, STEPHEN, J.
发明人
WILLIAMS, MICHAEL, J.;FERREIRA, DAVID;VARDION, STEPHEN, J.