Ships – Towing or pushing – Coupling means
Patent
1978-03-30
1981-12-29
Blix, Trygve M.
Ships
Towing or pushing
Coupling means
114246, 114247, 114248, B63B 2104
Patent
active
043076785
ABSTRACT:
A hydraulic quick release system for tightening and releasing tug and barge cable connections in the event of a breakage of a cable. The system comprises a novel hydraulic circuit comprising a pair of hydraulic cylinders mounted on the stern of the tug with apparatus for attaching the barge cable connections to the hydraulic cylinders. Each cylinder has an apparatus for actuating the cylinders simultaneously and independent of each other to tighten and loosen the cable connections. There is provided in the system by-passing apparatus whereby each cylinder may be independently actuated as required by conditions. Controlling apparatus permit the cylinders to be quickly actuated to tighten and loosen the barge cable connections as desired with apparatus being provided for increasing the extending speed of the cylinders in order that the cables can be quickly released from the cylinders by a quick extending thereof. A pilot-operated check valve and in-line check valve provide a regenerative system which is utilized for increasing the extending speed of the cylinder for releasing the cable without other pumps or increasing the horsepower of the unit. In a modification there is provided manual control apparatus associated with an auxiliary pump for controlling the system in an emergency generator failure.
In a modification of the preferred embodiment there is further provided a further safety feature to the system comprising an auxiliary pump accessory drive off of the tugs tow winch engine or other engine which is connected to the hydraulic sump of the system and operatively connected to the hydraulic cylinders with manual control means associated with the auxiliary pump for controlling the hydraulic fluid from the pump to the hydraulic cylinders in an emergency generator failure in event that the basic actuating means of the invention fails.
REFERENCES:
patent: 2892310 (1959-06-01), Mercier
patent: 3132622 (1964-05-01), Hackenberger
patent: 3461829 (1969-08-01), Mosvold
patent: 3508400 (1970-04-01), Mercier
patent: 3576170 (1971-04-01), Bush
patent: 3645225 (1972-02-01), Lunde
patent: 3842781 (1974-10-01), Kikui
patent: 4026234 (1977-05-01), Zbilut et al.
patent: 4072122 (1978-02-01), Balston
Blix Trygve M.
Keen D. W.
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