Structure for supporting air filter

In an air filter having a casing accommodating an air filtration element and provided with top and bottom openings and a detachable cap to close said top opening, said air filter being adapted to be mounted on the intake of a carburetor by cooperation with a centering bolt extending therefrom and a nut on said bolt, the combination of improved structure for supporting said air filter comprising:

• a first resilient disc-like member having a central opening and closing said casing bottom opening, said member being fixed to said casing through a metallic ring plate secured to the outer periphery of said member and to said casing about said bottom opening, said member having a sealing portion for making sealing contact with said air intake;
• a supporting member including a cylindrical portion, a disc-shaped portion and a plurality of supporting pillars extending between said portions, said cylindrical portion being secured to said first resilient member about said central opening therein;
• a second resilient member secured to said cap and engaged with said disc-shaped portion to resiliently support said cap;
• and
• a rigid spacer engageable by and between said nut and said disc-shaped portion for limiting the tightening force applied to said second resilient member by said nut.