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1. (WO1998051932) DISTRIBUTOR FOR A HYDRAULIC HOIST WHICH IS CONTROLLABLE WITH REGARD TO POSITION AND APPLIED FORCE, FOR TRACTORS AND AGRICULTURAL MACHINES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051932 International Application No.: PCT/EP1998/002694
Publication Date: 19.11.1998 International Filing Date: 07.05.1998
IPC:
A01B 63/10 (2006.01) ,F15B 11/042 (2006.01) ,F15B 13/01 (2006.01)
A HUMAN NECESSITIES
01
AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
B
SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
63
Lifting or adjusting devices or arrangements for agricultural machines or implements
02
for implements mounted on tractors
10
operated by hydraulic or pneumatic means
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15
FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
B
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11
Servomotor systems without provision for follow-up action
02
Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
04
for controlling the speed
042
by regulating means in feed line
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15
FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
B
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
13
Details of servomotor systems
01
Locking-valves or other detent devices
Applicants:
MITA OLEODINAMICA S.P.A. [IT/IT]; Via Carlo Cipolla, 12 I-37039 Tregnago, IT (AllExceptUS)
CORNIA, Enrico, Maria [IT/IT]; IT (UsOnly)
Inventors:
CORNIA, Enrico, Maria; IT
Agent:
PROVVISIONATO, Paolo; Provvisionato & Co. S.r.1. Via Mascarella, 85 I-40126 Bologna, IT
Priority Data:
BO97A00028913.05.1997IT
Title (EN) DISTRIBUTOR FOR A HYDRAULIC HOIST WHICH IS CONTROLLABLE WITH REGARD TO POSITION AND APPLIED FORCE, FOR TRACTORS AND AGRICULTURAL MACHINES
(FR) DISTRIBUTEUR POUR UN SYSTEME DE LEVAGE HYDRAULIQUE DONT LA POSITION ET LA FORCE APPLIQUEE PEUVENT ETRE REGLEES, POUR DES TRACTEURS ET DES MACHINES AGRICOLES
Abstract:
(EN) A distributor for a hydraulic hoist which is controllable with regard to position and applied force, for tractors and agricultural machines, comprises a compact body (2) having at least one inlet duct (3) for a pressurised fluid, at least one discharge duct (8, 22, 11, 19a) and at least one duct (5) for connection to a hydraulic cylinder (6) for lifting the hoist arms. Arranged in the body (2) of the distributor are valve means (7) for modulating the flow of pressurised fluid and for communicating with the connecting duct (5) by way of a main internal duct (9, 9a), and a valve unit (12) for discharging the fluid coming from the hydraulic lifting cylinder (6). A slider (16) is movable inside the cylindrical body (2) in two opposite directions (C, S) with respect to a neutral position (N) and controls the modulating valve means (7) hydraulically, preferably with the interposition of consent valve means (19). The slider (16) also controls the discharge valve unit and a variable choke member (16c) arranged in the main internal duct (9, 9a).
(FR) L'invention concerne un distributeur pour un système de levage hydraulique dont on peut régler la hauteur et la force appliquée, pour des tracteurs et des machines agricoles. Ce distributeur comprend un corps compact (2) présentant au moins une conduite d'entrée (3) pour un fluide sous pression, au moins une conduite de décharge (8, 22, 11, 19a) et au moins une conduite (5) en vue de son raccordement à un vérin hydraulique (6) permettant de soulever les bras de levage. Dans le corps (2) du distributeur, sont logés des moyens formant soupapes (7) permettant de moduler l'écoulement du fluide sous pression et de communiquer avec la conduite de raccordement (5) par une conduite interne principale (9, 9a). Ce corps (2) contient également une soupape (12) pour décharger le fluide provenant du vérin hydraulique (6). Ce coulisseau (16) peut se déplacer à l'intérieur du corps cylindrique (2) dans deux directions opposées (C, S) par rapport à une position de point mort (N) et commande la soupape de modulation (7) de manière hydraulique, de préférence, en interposant des soupapes (19). Le coulisseau (16) commande également la soupape de décharge et un élément à étranglement variable (16c) placé dans la conduite interne principale (9, 9a).
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Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
TR1999/00069KR1020000023734EP0910748US6105613JP2000514909 AU1998076531