EP 1213486 A3 20040107 - Hydraulic unit with automatic regenerative system typically for log splitting machines operated by a single-acting cylinder-piston unit
Title (en)
Hydraulic unit with automatic regenerative system typically for log splitting machines operated by a single-acting cylinder-piston unit
Title (de)
Hydraulische Einrichtung mit einer Differentialschaltung, zum Beispiel eines durch einen einfach-wirkenden Zylinder betätigten Holzspaltgeräts
Title (fr)
Unité hydraulique avec circuit différentiel, typiquement pour une machine de fendage de bois actionée par un vérin à simple effet
Publication
Application
Priority
IT RE20000125 A 20001205
Abstract (en)
[origin: EP1213486A2] A hydraulic operating system for a tool, typically for a log splitting machine, comprising a single acting hydraulic cylinder-piston unit (9), a motor-driven pump (1) and a hydraulic distributor (5) arranged to selectively connect the piston chamber (90) of said cylinder-piston unit (9) to the pump delivery (4) or to discharge (15), in which the piston rod chamber (91) of the cylinder-piston unit (9) is connected to the piston chamber (90) by a conduit (13) comprising a unidirectional valve (130) which prevents oil transfer towards the piston rod chamber (91), and to the oil reservoir (3) by a discharge conduit (12) closed by a preset overpressure valve (120) sensitive to the pump delivery pressure and by a separate suction conduit (14) provided with a unidirectional valve (140) which prevents oil flow towards the reservoir (3). <IMAGE>
IPC 1-7
IPC 8 full level
B27L 7/00 (2006.01); F15B 11/024 (2006.01)
CPC (source: EP)
B27L 7/00 (2013.01); F15B 11/024 (2013.01); F15B 2011/0243 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/30525 (2013.01); F15B 2211/3058 (2013.01); F15B 2211/3133 (2013.01); F15B 2211/31576 (2013.01); F15B 2211/324 (2013.01); F15B 2211/50518 (2013.01); F15B 2211/55 (2013.01); F15B 2211/7052 (2013.01); F15B 2211/7716 (2013.01); F15B 2211/775 (2013.01)
Citation (search report)
- [X] FR 2057287 A5 19710521 - LUCHAIRE SA
- [A] US 3759144 A 19730918 - IKEDA H
- [A] US 2800110 A 19570723 - HAARMEYER ROBERT C
- [A] WO 9315886 A1 19930819 - JANCZAK JERZY [SE]
- [A] EP 0806271 A2 19971112 - BELL SRL [IT]
- [A] US 3640323 A 19720208 - HELLE GORDON W
- [A] US 3077214 A 19630212 - BRUKNER CLAYTON J
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1213486 A2 20020612; EP 1213486 A3 20040107; EP 1213486 B1 20051026; AT E307980 T1 20051115; DE 60114347 D1 20051201; DE 60114347 T2 20060420; DK 1213486 T3 20060313; ES 2248225 T3 20060316; IT 1319478 B1 20031010; IT RE20000125 A0 20001205; IT RE20000125 A1 20020605; NO 20015478 D0 20011108; NO 20015478 L 20020606; NO 319360 B1 20050718
DOCDB simple family (application)
EP 01204395 A 20011116; AT 01204395 T 20011116; DE 60114347 T 20011116; DK 01204395 T 20011116; ES 01204395 T 20011116; IT RE20000125 A 20001205; NO 20015478 A 20011108