Blade control system for concrete cutting apparatus

Details Blade control system for concrete cutting apparatus Blade control system for concrete cutting apparatus

1987-01-23

1988-08-30

Massie, Jerome W.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

299 39, E21C 2516

Patent

active

047671629

ABSTRACT:
A hydraulic system for a pavement cutting machine controls the engagement and disengagement of a rotating blade with a pavement surface. A proportional-flow manual-release valve is arranged in series with a pressure-compensated maximum-flow control valve to allow a rapid raising of the blade and an initial relatively rapid lowering of the blade followed by a controllable slower blade descent.

REFERENCES:
patent: 2858650 (1958-11-01), Janowitz
patent: 2974938 (1961-03-01), Lewis
patent: 3208796 (1965-09-01), Hatcher
patent: 4310198 (1982-01-01), Destree
patent: 4588231 (1986-05-01), Silay et al.

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