Trailer spring

A trailer spring for resiliently supporting a load between the chassis of a trailer and the running gear of said trailer comprising;

• a base member having first and second ends which ends incorporate means wherein the base member may be attached to said trailer chassis, the first end of said base member having a transverse journal in which is positioned a pair of bearings;
• a beam member having a first end and a second end the first end of which is pivitoly attached to the first end said base member by a bolt which poses through said beam member and through said journal and bearings said beam member being provided with an axle which is attached to the beam intermediate of its first and second ends and between the beam and the base;
• a circular holder which is positioned between said base member and said beam member and is secured to said base member aproximate its second end;
• an elastomeric block of a deformable, polyurethane material which is positioned in said holder;
• a circular piston which is positioned in said circular holder and which is biased against said rectangular block;
• the second ends of said base member and beam member being secured to each other by a bolt and nut which passes through apertures which are integral with said base member, said beam member, said piston and said rectangular block;
• wherein said base member, said beams and said holder are formed from aluminum and said piston is formed from a polymeric material.