Traction type elevator system

Details Traction type elevator system Traction type elevator system

1984-09-19

1986-05-27

Rolla, Joseph J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

254416, 254902, 474168, B66B 1108

Patent

active

045910251

ABSTRACT:
A main rope is wound round a sheave and a deflector wheel by three turns, and the sectional shape of those rope grooves of the sheave with which the main rope is held in engagement is formed in the shape of circular arcs, whereby the lifetimes of the main rope and the sheave are lengthened, and an enhanced traction ability is attained. Among the grooves of the driving sheave around which the main rope is wound, those except the grooves around which the main rope is wound first and last are shaped so as to afford greater friction at contact therebetween than the frictional contact of the first and last grooves, or the grooves around which the main rope is wound first and last are rendered higher in hardness than the other grooves, whereby the amounts of wear of the respective grooves are equalized to extend the lifetimes of the rope and the sheave and to prevent the pleasant ride of an elevator from worsening.

REFERENCES:
patent: 1098845 (1914-06-01), Schwab
patent: 1802759 (1931-04-01), Dunlop
patent: 3168287 (1965-02-01), Parola
patent: 4030569 (1977-06-01), Berkovitz

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