Motion compensators and mooring devices

Details Motion compensators and mooring devices Motion compensators and mooring devices

1984-12-19

1988-01-26

Nase, Jeffrey V.

Ships

Mooring device

Boom type

441 3, 441 4, E21B 1908

Patent

active

047210532

ABSTRACT:
A compensator for providing resilience in a connection between relatively moveable objects comprises a piston (3) working in a cylinder (2) which is surrounded by a larger coaxial cylinder (1) joined thereto by annular wall members (1a) thus defining about the cylinder (2) a pair of annular reservoirs (8,9). The piston (3) divides the cylinder (2) into a pair of chambers (6,7), chamber (6) being connected by conduit (12) to reservoir (9) and chamber (7) being connected by conduit (10) to reservoir (8). Each reservoir contains a mixture of liquid and gas while the chambers contain liquid. Elongation of the connection between the objects causes withdrawal of the piston (3) with consequent expansion of the volume of gas in reservoir (9) against atmospheric pressure and against pressure developed in reservoir (8) as a consequence of decrease of gas volume therein.

REFERENCES:
patent: 3664388 (1972-05-01), Frankel
patent: 4066030 (1978-01-01), Milone
patent: 4086865 (1978-05-01), Statham
patent: 4091879 (1978-05-01), Andrepont
patent: 4305341 (1981-12-01), Stafford
patent: 4371037 (1983-02-01), Arnaudeau
patent: 4453638 (1984-06-01), Wallace
patent: 4502673 (1985-03-01), Clark

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