Method for detecting a crane hook lifting distance

Details Method for detecting a crane hook lifting distance Method for detecting a crane hook lifting distance

1994-06-23

1997-07-08

Merritt, Karen B.

Traversing hoists

Having random condition sensor combined with an indicator or...

Hoisting stops upon load being raised to a predetermined...

B66C 1308

Patent

active

056451814

ABSTRACT:
Rope extension is detected as a rope shift distance at predetermined time intervals. A rope extension amount is obtained as the accumulated value of the shift distances. The rope shift accumulated value is automatically reset to 0 when a hook structure reaches an overhoist position to renew the reference position of the rope extension amount and to correct any measurement errors of the rope extension amount. From this rope extension amount, a hanging length of the hook structure from a boom or jib top is obtained and used to calculate a hook lifting distance. The calculated hook lifting distance, or hook structure position, is displayed on a display screen relative to a fixed index or pattern. An operator can monitor the state of the hook structure from the display.

REFERENCES:
patent: 3517830 (1970-06-01), Virkkala
patent: 3685668 (1972-08-01), Suverkrop
patent: 4717029 (1988-01-01), Yasunobu et al.
patent: 4804095 (1989-02-01), Rohr et al.
patent: 5127533 (1992-07-01), Virkkunen
Liebherr Operating Instruction Manual, Germany 1970.

Affiliated with

Also associated with

Rating

Method for detecting a crane hook lifting distance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for detecting a crane hook lifting distance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting a crane hook lifting distance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2404896