| 摘要 |
<p>A restriction indicator for an air cleaner of an internal combustion engine. A bellows-type diaphragm is biased toward a retracted position by a first end of a compression spring. A calibration wheel threadingly engaging the housing supports a second end of the compression spring, such that the restriction indicator can be calibrated by rotation of the calibration wheel. An end of the compression spring is seated on a slanted seating surface so that a plunger is pushed off-center to engage a latch and lock the restriction indicator. Two arrangements of flow restricting orifices in the indicator are described which are for the purpose of dampening pressure spikes which can cause premature indication of a restriction.</p> |
