High-lift attachment for an agricultural tractor provided with a

Details High-lift attachment for an agricultural tractor provided with a High-lift attachment for an agricultural tractor provided with a

1980-04-02

1982-08-24

Love, John J.

Material or article handling

Vertically swinging load support

Shovel or fork type

414707, 414713, 414917, B66F 906

Patent

active

043458718

ABSTRACT:
A high-lift attachment for a tractor provided with a three-point linkage comprises a platform provided with a vertical backing frame, and a vertical intermediate frame positioned between the backing frame and the tractor body. The intermediate frame is connected to the three-point linkage arms of equal length by three pivots which are positioned on this frame in spatial alignment corresponding to the position of the points of attachment on the tractor, whereby the frame remains in its vertical position at any height of lift. The intermediate frame and the backing frame are interconnected by one upper and two lower links which are in parallel alignment and wherein the distance between their linkage points is identical for all three links. The two lower links are elongated beyond the intermediate frame towards the tractor body which latter is provided with a pivoted member serving to attach the ends of these links and to keep them in their initial lowermost position. When the intermediate frame is raised by the tractor arms, the two lower links lift the backing frame and the platform high above the intermediate frame, while at the same time reducing the distance of the load from the tractor and thereby the load moment.

REFERENCES:
patent: 2449212 (1948-09-01), Fraga
patent: 3127999 (1964-04-01), Gostomski
patent: 3468442 (1969-09-01), Sarvela

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