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Machine translation
1. (WO1980002446) DRAW WORKS TRANSMISSION CONTROL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002446    International Application No.:    PCT/US1979/000293
Publication Date: 13.11.1980 International Filing Date: 02.05.1979
IPC:
B66D 5/26 (2006.01)
Applicants:
Inventors:
Priority Data:
US79/00293 02.05.1979 WO
Title (EN) DRAW WORKS TRANSMISSION CONTROL
(FR) COMMANDE DE TRANSMISSION D"UNE MACHINE D"ETIRAGE
Abstract: front page image
(EN)In a control (28) for a hydraulically operated draw works or the like having a hydraulically disengaged brake (14), a transmission (10, 12) and a brake control valve (114, 122), the improvement including an accumulator (174) having a check valve (196) connected between the brake control valve outlet (152) and the brake (14) to modulate the application of the brake (14) after the brake (14) has been fully released and to provide no modulation of brake (14) application after the brake (14) has been only partially released to thereby minimize shock in the draw works components when a load is lowered rapidly and yet provide rapid action when operated slowly.
(FR)Dans une commande (28) d"un appareil d"etirage hydraulique ou autre ayant un frein degage hydrauliquement (14), une transmission (10, 12) et une soupape de commande de frein (114, 122), l"amelioration consiste en un accumulateur (174) ayant une soupape de retenue (196) connectee entre la sortie de la soupape de commande de frein (152) et le frein (14) pour moduler l"application du frein (14) apres que ce dernier ait ete completement relache et pour qu"il n"y ait aucune modulation de l"application du frein (14) apres que ce dernier n"ait ete que partiellement relache de maniere a reduire au minimum les chocs dans les composants de la machine de tirage lorsqu"une charge est abaissee rapidement tout en assurant une action rapide lorsqu"il est actionne lentement.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)