Crane

Details Crane Crane

1984-07-12

1986-02-25

Blix, Trygve M.

Traversing hoists

Having vertically swinging boom

Extensible by movement of boom or boom segment along...

212231, 212257, 212208, 212142, 212225, 212237, 212260, 212195, B66C 2304, B66C 700, B66C 504, B66C 2372

Patent

active

045723834

ABSTRACT:
A crane is comprised a foundation, a supporting pole elongating vertically from the foundation, an arm capable of rotatably moving on a plane parallel with the supporting pole, and a winding drum mounted at the tip end portion of the arm, the arm consisting of two arms elongating in parallel with each other, the drum being mounted between two arms. The crane is installed on the rooftop of a building or the like and capable of effectively pulling up an object from a narrow road onto a narrow rooftop and setting it up on a rooftop.

REFERENCES:
patent: 600973 (1898-03-01), Truax
patent: 1143560 (1915-06-01), Voelker
patent: 3197036 (1965-07-01), Mason
patent: 3207044 (1965-09-01), Hall
patent: 3610433 (1977-10-01), Milner, Jr. et al.
patent: 3828941 (1974-08-01), Coutinho
patent: 4286721 (1981-09-01), Ashworth

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