Cutoff device for crane systems

Details Cutoff device for crane systems Cutoff device for crane systems

1988-05-17

1989-02-14

Basinger, Sherman D.

Traversing hoists

With haul-in line

37 71, 37 72, 37DIG1, 212153, 254275, 340860, B66C 1308

Patent

active

048040959

ABSTRACT:
The cutoff device is provided for crane systems, especially a dredger to which a grab 1 is attached. Grab 1 has a cable 5 connected to it, which is guided over pulleys 4, 7 and kept under tension with the help of a weight 9. One of the two pulleys 4 is provided with an initiator 12 that has segments mounted on its periphery, so pulses are generated by the rotation of pulley 4 past the initiator and the drive mechanism is switched off when the pulses fail to occur.

REFERENCES:
patent: 2496101 (1950-01-01), Massey
patent: 2623387 (1952-12-01), Pitcher et al.
patent: 2882516 (1959-04-01), Neergaard
patent: 4047311 (1977-09-01), Kelley
patent: 4186609 (1980-02-01), Baermann
patent: 4305072 (1981-12-01), Makita
patent: 4334217 (1982-06-01), Nield et al.
patent: 4584784 (1986-04-01), Wolters et al.

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