SELF-LEVELLING DEVICE FOR SHOVEL LOADERS

SELF-LEVELLING DEVICE FOR SHOVEL LOADERS

A hydraulic device for setting the level of a shovel (12) arranged so as to be tiltable on a pivotable boom (14) contains a shovel-aligning valve (90) which provides for constant shovel alignment during the lifting or lowering of the boom. The hydraulic circuit supplies the shovel-aligning valve (90...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: FRYK, BRUCE KEVIN
Format: Patent
Sprache:eng ; ger
Schlagworte:
DREDGING
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
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Beschreibung
Zusammenfassung:A hydraulic device for setting the level of a shovel (12) arranged so as to be tiltable on a pivotable boom (14) contains a shovel-aligning valve (90) which provides for constant shovel alignment during the lifting or lowering of the boom. The hydraulic circuit supplies the shovel-aligning valve (90) automatically and alternatively with fluid flowing back from the boom cylinder (18) and/or fluid coming directly from the pump (40). The fluid flows are controlled by valves (54, 64, 102) responding to pressure and by a shuttle valve (70).