Motors: expansible chamber type – With signal – indicator or inspection means
Patent
1983-07-01
1987-03-03
Hershkovitz, Abraham
Motors: expansible chamber type
With signal, indicator or inspection means
91361, 91367, 91445, 92 131, 172 4, F01B 2526
Patent
active
046466207
ABSTRACT:
An automatic depth control system is disclosed. The system includes a floating piston hydraulic cylinder in which the floating piston is adjusted as a stop for limiting the travel of the main piston in the cylinder. A depth sensing system is provided to sense the actual depth of a implement tool on which the cylinder is mounted to provide a depth signal indicative of the depth penetration of the tool. A circuit system is provided to receive the depth signal and to control a hydraulic valve system to move the stop piston within the cylinder to adjust the working position of the implement tool. The control system includes an instrument panel having a first display indicating the actual depth of the implement tool and a second display indicating the depth limit settings predetermined by the operator. Further means are provided to monitor the actual depth and compare it to the selected depth setting and thereby correct the position of the floating piston.
REFERENCES:
patent: 2755721 (1956-07-01), Rusconi
patent: 3727517 (1973-04-01), Slavin
patent: 3768367 (1973-10-01), Fuzzell
patent: 3945299 (1976-03-01), Fritz
patent: 4176721 (1979-12-01), Poggemiller
patent: 4355688 (1982-10-01), Hamm
patent: 4423664 (1984-01-01), Buchl
patent: 4445421 (1984-05-01), Walker
patent: 4529039 (1985-07-01), Sakundiak
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