Ships – Fenders
Patent
1985-03-25
1986-08-26
Blix, Trygve M.
Ships
Fenders
405212, B63B 5902
Patent
active
046075860
ABSTRACT:
A compression shock absorber for use on offshore oil platforms, for example, is used as part of an overall bumper system for receiving impact from marine vessels which are docking at the offshore platform. The apparatus includes a base structural section which is preferably horizontally disposed and having one end portion that is rigidly attached to the offshore oil platform at one of the legs near the water line. A moving structural section slides upon the first base structural section between inner retracted and outer projected positions. The sections are preferably cylindrical such as structural steel pipe, for example. First and second load transfer surfaces are carried respectively by the base and by the moving structural sections for transferring a compressive load between the base and structural sections during use and at rest. A compressible mass such as resilient rubber is positioned between the first and second load transfer surfaces for biasing the moving section into the projected position. A tensioning bar normally puts the mass in compression and defines the projected position as a normal resting position prior to impact by a vessel. Thus, the mass can always be maintained in compression, increasing the shear component load which the device can handle.
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Avila Stephen P.
Blix Trygve M.
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