Apparatus for positioning an excavator housing

Details Apparatus for positioning an excavator housing Apparatus for positioning an excavator housing

1993-12-27

1995-09-05

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

388929, 74DIG1, G05D 1600

Patent

active

054481481

ABSTRACT:
A method and apparatus for positioning a housing of an excavator housing. A motor receives pressurized fluid to cause rotation of the excavator housing. A motor position sensor determines the rotational position of the housing and responsively produces a housing position signal. A pressure sensor determines the fluid pressure supplied to the motor and responsively produces a pressure signal. A microprocessor produces a signal indicative of a desired rotational position of the housing. The microprocessor receives the position and pressure signals, and responsively controls fluid to the motor in order to rotate the housing to the desired position.

REFERENCES:
patent: 3577664 (1971-05-01), Sing
patent: 3720059 (1973-03-01), Schurawski et al.
patent: 3958494 (1976-05-01), Miller
patent: 4704923 (1987-11-01), Taylor
patent: 4879501 (1989-11-01), Haner
patent: 4976687 (1990-12-01), Martin
patent: 5085101 (1992-02-01), Oldfield
patent: 5219275 (1993-06-01), Ribaudo

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