Barge bumper construction

摘要

A bumper construction for offshore oil rig structures in which an upright metal bumper pipe member of considerable length is encased or sheathed loosely with a tubular rubber enclosure rotatable on the pipe member. The tubular enclosure is formed by a series of rubber sleeves telescoped over and stacked on the upright pipe. Each sleeve has three integrally vulcanized layers of elastomeric materials which have physical properties different one from those of each other layer. The different elastomeric materials are present in predetermined percentages by weight. Each sleeve has a length substantially greater than its inner diameter and preferably more than two times its inner diameter. The sleeves have interfitting conical formations at adjacent ends when stacked.