Fluid filter with integral viscous damper

摘要

The specification discloses an improved fluid filter (10) including a housing (12), cover (26), spring biased filter element (30) movable between normal and bypass positions, and viscous damper (50) for eliminating oscillation of the filter element. The damper (50) can comprise either a circumferential integral step (52) formed in the filter housing (12) or a separate sleeve (54) inserted therein, located a predetermined distance below the lower end of the filter element (30) when the filter element is in the normal position.