Ships – Mooring device – Boom type
Patent
1982-06-28
1984-07-17
Basinger, Sherman D.
Ships
Mooring device
Boom type
141387, 441 5, B63B 2100
Patent
active
044599307
ABSTRACT:
A yoke mooring system pivoted on the forecastle of a vessel, such as a shuttle tanker, is detachably coupled to a riser which is attached to a base located on the ocean floor. The yoke mooring system includes clamping arms which engage a ball with an axial passage at the upper end of the riser. Hydraulic cylinders raise and lower the yoke, and a hydraulic cylinder shifts mechanical linkages to open and close clamping arms mounted on the yoke. A socket is formed in the clamping arms to receive the ball. Cargo piping on the vessel is joined to the ball through hoses and a fluid swivel. Fluid cargo can pass upwardly through the riser, through the ball, through the fluid swivel and hoses, and then through cargo piping to storage tanks on the vessel. Bearings situated between the riser and the ball allow the ball to rotate such that, when the clamping arms are coupled to the ball, the vessel can rotate about the riser without disrupting fluid flow or damaging the riser. In a preferred embodiment, the riser houses a normally closed valve, which is opened to allow fluid flow when the yoke exerts an upward force on the ball. Other embodiments suggest diverse configurations and locations for the bearings, alternative valves for regulating fluid flow, modifications to the ball, etc.
REFERENCES:
patent: 1983655 (1934-12-01), Bowman et al.
patent: 3175845 (1965-03-01), McClive
patent: 3407768 (1968-10-01), Graham
patent: 3572408 (1971-03-01), Hnot
patent: 3809002 (1974-05-01), Nagy et al.
patent: 3964423 (1976-06-01), Gassett et al.
patent: 4088089 (1978-05-01), Flory
patent: 4114556 (1978-09-01), Orndorff, Jr. et al.
Basinger Sherman D.
Exxon Research and Engineering Co.
Wohlers Donald F.
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