초록 ▼

A fuel filter restriction indicating device communicating with the supply of fuel passing from a fuel tank to an internal combustion engine. The indicating device senses a decrease in the supply of fuel drawn through the fuel filter by the engine based upon changes in the amount of vacuum in the neg

A fuel filter restriction indicating device communicating with the supply of fuel passing from a fuel tank to an internal combustion engine. The indicating device senses a decrease in the supply of fuel drawn through the fuel filter by the engine based upon changes in the amount of vacuum in the negative side of the fuel supply, the amount of restriction being indicated by the movement of an indicating device. A mechanism included in the indicating device senses the movement of the indicating device and progressively locks the indicating device into various indicating positions as the vacuum increases due to an increased restriction of the filter, so that the maximum reading of restriction achieved during engine operation remains visible to the operator or maintenance personnel even after the engine is turned off.

대표청구항 ▼

[ What is claimed is:] [1.]1. A fuel filter gauge for indicating a condition of a fuel filter cooperating with a fuel system of an internal combustion engine of a motorized vehicle, the fuel filter gauge comprising:a housing having an aperture fluidly engaging the fuel system of the motorized vehicl

[ What is claimed is:] [1.]1. A fuel filter gauge for indicating a condition of a fuel filter cooperating with a fuel system of an internal combustion engine of a motorized vehicle, the fuel filter gauge comprising:a housing having an aperture fluidly engaging the fuel system of the motorized vehicle, said housing also including an end surface having an inner side;an indicator cup within said housing for indicating the condition of the fuel filter, said indicator cup being positionable between a first position and a second position;a base cap assembly fixedly engageable with said housing, said base cap assembly including a plurality of generally inwardly projecting lock fingers;a lockpin engageable with said base cap assembly and said indicator cup, said lockpin including a lock stem and a plurality of lock stem stops integral with said lock stem, said lock stem stops being releasably engageable with said lock fingers of said base cap assembly;a diaphragm positioned between said lockpin and said indicator cup; anda calibration spring bearing against said inner side of said housing on one end and against said indicator cup on another end, said calibration spring biasing said indicator cup toward said first position.