Heavy-construction machine

Details Heavy-construction machine Heavy-construction machine

2006-06-16

2009-10-20

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Externally operated multiway valve or interconnected control...

C060S494000, C091S440000, C091S464000

Reexamination Certificate

active

07603856

ABSTRACT:
A heavy-construction machine (1) including a working implement (5) having one or a number of arms (6) articulated with regard to the chassis (2) of the machine. An assembly consisting of at least one hydraulic cylinder (7) that causes the working implement (5) to move relative to the chassis (2) is provided together with a hydraulic circuit that supplies these cylinders based on the control commands issued by a hydraulic manipulator. The machine is capable of operating according to two distinct modes of which one is a lifting mode and the other is a loading mode. In each mode, cylinder travel can be freed when the manipulator is in a predetermined position corresponding to a position referred to as floating control. The machine further includes a mechanism for rendering the floating control position of the manipulator inactive when the machine is operating in lifting mode.

REFERENCES:
patent: 5513491 (1996-05-01), Broenner et al.
patent: 19548943 (1995-12-01), None
patent: 60059236 (1985-04-01), None

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