Patent ID: 7730581

Claim:
A weld-on barrel hinge for hinging together a first item and a second item, comprising: a cylindrical female barrel portion consisting essentially of a cylindrical sidewall with a length, two ends, and an outside surface, and an axial bore, the axial bore extending from end to end, wherein the cylindrical sidewall of the cylindrical female barrel portion is adapted for welding in place to the first item; a first and second male barrel portion, each male barrel portion consisting essentially of a generally cylindrical main body portion with an outer wall surface and an end wall at one end and a pin extension that extends from another end, the pin extension having a pin length, a pin diameter and a cylindrical side wall, each pin extension having an end wall, the pin diameter being sized to be rotatably received within the axial bore of the female barrel portion, wherein a passageway is formed in at least one of the first and second male barrel portions, the passageway having a first end that opens in the cylindrical main body portion, and at least one second end that opens in the pin extension, wherein the outer wall surfaces of the cylindrical main body portions of the first and second male barrel portions are welded directly in place to the second item with the pin extension received in the female barrel portion; and a lubricant fitting affixed to first end of the passageway in the cylindrical main body portion of the least one of the first and second male barrel portions.