Patent ID: 6109394
Filing Date: 2000-08-29
Classification: B66C,F16C,Y10T

Abstract:
An extendable boom for a mobile material handling machine having a support frame, the boom comprising:a first boom section connectable with the machine support frame;a second boom section slidably engaged with the first boom section, being configured to support a load to be moved and carried by the machine; anda wear pad disposed between the first and second boom sections and formed of a cast polyamide material with oil impregnated therein;wherein one of the first and second boom sections has a surface section having substantial surface roughness, the wear pad is attached to the other of the first and second boom sections and is contactable with the rough surface section of the one boom section such that sliding movement of the second boom section with respect to the first boom section causes portions of the wear pad to strip away from the wear pad and adhere to the rough surface section to form a wear surface on the one boom section.