Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1981-08-31
1983-07-05
Burr, Edgar S.
Material or article handling
Vertically swinging load support
Shovel or fork type
37DIG19, 116230, 116281, 116DIG7, B23Q 1900
Patent
active
043915639
ABSTRACT:
A bucket position indicator assembly for relieving the operator from constantly maintaining visual contact with the bucket and thereby taking his attention away from other operator functions. The bucket position indicator assembly includes a fluid cylinder, a slidable piston actuator, and an indicator panel that is mounted within the operator's compartment. The actuator includes a rod member which is pivotally attached at one end to the bucket movement linkage for reciprocal movement in response to rotational movement by the bucket. The piston end of the actuator is slidably movable within the fluid cylinder in response to the movement of the bucket during its normal duty cycle. A bore through the rod member permits fluid pressure to escape into an annular chamber formed between sealing disks at the piston end of the actuator. A plurality of orifices along the periphery of the fluid cylinder are connected by conduits to corresponding fluid inputs at the indicator panel. The annular fluid chamber formed by the piston end of the actuator becomes aligned with one of the orifices in the fluid cylinder when the bucket is either in a rollout, level, or rollback position. When fluid pressure is applied to any one of the inputs at the indicator panel, a corresponding indicator member appears in a window of the indicator panel so that the operator can determine whether the bucket is level, rolled out, or rolled back.
REFERENCES:
patent: 2808017 (1957-10-01), Killebrew
patent: 3198360 (1965-08-01), Strader et al.
patent: 3251492 (1966-05-01), Kampert et al.
patent: 3251493 (1966-05-01), Popelier
patent: 3547293 (1970-12-01), Borer
patent: 3710968 (1973-01-01), Clevenger et al.
patent: 3796335 (1974-03-01), Smith et al.
patent: 3938549 (1976-02-01), Nunneley
Burr Edgar S.
J. I. Case Company
Wiecking David A.
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