Airspring with pneumatic fitting

Claim 1

An airspring having at least one plastic rigid member comprising: an upper retainer; a lower retainer spaced apart from the upper retainer; a flexible gas impervious membrane sealably attached to said upper and lower retainers to form a cavity therebetween wherein at least one of said retainers is made of plastic and includes an orifice therethrough in connection with the cavity, said orifice having first, second, third, fourth and fifth concentric bores; a coupling comprising an annular sleeve including a plurality of jaws adapted for receiving a fluid conduit therein being positioned in said orifice, a ring having a flared portion for forcing the jaws of the annular sleeve radially inward into engagement with the fluid conduit surrounding said sleeve, said ring including a flange having a diameter equal to said first bore, said ring being retained in said first and second bores, an o-ring being positioned axially inward of said ring within said third bore, to form a seal between the fluid conduit and the orifice and said fluid conduit being positioned within said fourth bore and said fifth bore connecting with said cavity.