Method and apparatus for controlling a bucket and thumb of a wor

Details Method and apparatus for controlling a bucket and thumb of a wor Method and apparatus for controlling a bucket and thumb of a wor

1999-03-18

2000-11-14

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Construction or agricultural-type vehicle

172 45, 172 9, 37348, G06F 770, G06F 1900

Patent

active

061482544

ABSTRACT:
An apparatus and method for controlling the clamping forces on an object being held between a bucket and a thumb of a work machine is disclosed. The apparatus and method controls the head and rod end pressures of the bucket and thumb hydraulic cylinders to substantially maintain a desired clamping pressure on the gripped object, thereby providing at a touch of a switch, a work machine that can be controlled as the thumb and forefinger combination of the human hand which gives a "wristlike" action to the bucket thumb combination.

REFERENCES:
patent: 5065326 (1991-11-01), sahm
patent: 5461803 (1995-10-01), Rocke
patent: 5493798 (1996-02-01), Rocke et al.
patent: 5528498 (1996-06-01), Scholl
patent: 5611656 (1997-03-01), Davis et al.
patent: 6032093 (2000-02-01), denbraber et al.

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