Abstract: A high-pressure, high temperature expansion joint having superior physical characteristics and susceptible of economical manufacture. The joint comprises inner and outer covering layers of elastomeric material and a body which includes at least one layer of a bias-cut fabric and at least one outer supporting layer formed of a helically-wound strip of elastomeric material with a plurality of parallel reinforcing strands running longitudinally through the strip. The joint is formed in a shallow or flowing arch configuration which does not trap particulate materials in a fluid stream, and obviates the need for a filler piece.

Abstract: A release mechanism for a downrigger or the like for releasably securing the fishing line to the downrigger and for releasing the fishing line in response to the exertion of a predetermined minimum horizontal force substantially regardless of the magnitude of vertical force exerted on the fishing line.