Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1977-07-07
1980-01-29
Paperner, L. J.
Material or article handling
Vertically swinging load support
Shovel or fork type
52115, 92118, 212144, 403131, 414694, E02F 338
Patent
active
041859456
ABSTRACT:
A shovel linkage for a hydraulic excavator includes boom rails having pivot means in one end for pivotal connection to an excavator and cross tubes extending between the rails near the pivot means and having pivot joints provided thereon for connection of actuating cylinders for the linkage in line with the cross tube and close to the pivot means whereby forces imparted to the linkage by the actuating cylinders will be directly through the center of the cross tube and very near the boom rail pivot means, minimizing bending moments in the linkage.
The pivot joint includes a flat tab member provided on the cross tube and projecting outwardly along a diameter thereof, and a pin and ball connecting the bifurcated end of a hydraulic cylinder to the tab for limited rotation thereof. The pin is disposed substantially normal to the plane of the boom rails for unimpeded insertion and removal thereof.
REFERENCES:
patent: 2918039 (1959-12-01), Boje et al.
patent: 3168014 (1965-02-01), Aslan
patent: 3327880 (1967-06-01), Brown
patent: 3537735 (1970-11-01), Hawk
Caterpillar Tractor Co.
Paperner L. J.
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