Levelling device for a material handling member

Details Levelling device for a material handling member Levelling device for a material handling member

1980-03-13

1982-03-09

Salfer, Robert W.

Material or article handling

Vertically swinging load support

Shovel or fork type

414714, 414728, E02F 332

Patent

active

043186637

ABSTRACT:
A mechanical linkage and hydraulic circuit are used to control the position of a material handling element. A bell crank and outrigger arm are joined between the boom and dipperstick of a backhoe linkage and the supporting frame. A relief valve discharges fluid pressure building up in the actuator between the support frame and the boom. The bell crank linkage and hydraulic circuit maintains the position of the material handling element along the grade by manipulating the dipperstick alone.

REFERENCES:
patent: 3239083 (1966-03-01), Guinot
patent: 3259259 (1966-07-01), Metailler
patent: 3952890 (1976-04-01), Armstrong
patent: 4054216 (1977-10-01), Inui et al.

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