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Machine translation
1. (WO1979000991) AUTOMATIC GRAPPLE CONTROL SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000991    International Application No.:    PCT/US1978/000220
Publication Date: 29.11.1979 International Filing Date: 11.12.1978
IPC:
B66C 1/58 (2006.01), B66C 3/16 (2006.01)
Applicants:
Inventors:
Priority Data:
900632 27.04.1978 US
Title (EN) AUTOMATIC GRAPPLE CONTROL SYSTEM
(FR) SYSTEME DE COMMANDE AUTOMATIQUE D"UNE BENNE PRENEUSE
Abstract: front page image
(EN)Maintenance of pressure in the hydraulic circuit controlling the closing of the tongs of a grapple in order to prevent a load carried by the tongs from falling or slipping. The grapple tong (12, 14) system has first (28) and second (30) hydraulic lines for closing and raising the grapple (13) tongs, respectively. A hydraulic (32) system is provided for automatically, controllably passing fluid from the second to the first line in response to a preselected pressure in the first (28) line and a higher pressure in the second (30) line for automatically, controllably urging the grapples (13) to a closed position.
(FR)On maintient la pression dans le circuit hydraulique commandant la fermeture des griffes d"une benne preneuse de maniere a empecher une charge portee par les griffes de tomber ou glisser. Le systeme de benne preneuse a griffes (12, 14) possede un premier (28) et un second (30) circuit hydraulique pour fermer et lever la benne preneuse a griffes (13) respectivement. Un systeme hydraulique (32) assure automatiquement le passage commande d"un fluide du second circuit au premier circuit en reponse a une pression predeterminee dans le premier circuit (28) et une pression superieure dans le second circuit (30) pour forcer automatiquement les griffes (13) a prendre une position fermee.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)