公开(公告)号：EP4428376A1

公开(公告)日：2024-09-11

申请号：EP24161941.0

申请日：2024-03-07

Applicant: Valvole Italia S.r.l.

Inventor： PAOLILLO, Alfredo ,  BERTANI, Marcello ,  STORCI, Andrea

IPC: F15B11/00 ,  F15B11/024 ,  F15B11/044 ,  F15B11/05 ,  F15B20/00

CPC classification number: F15B20/008 ,  F15B2211/863620130101 ,  F15B2211/4056120130101 ,  F15B11/05 ,  F15B2211/46520130101 ,  F15B2211/4620130101 ,  F15B11/044 ,  F15B2211/7520130101 ,  F15B2211/4152720130101 ,  F15B11/003 ,  F15B2211/3051520130101 ,  F15B2211/5055420130101 ,  F15B2211/52820130101 ,  F15B2211/515920130101 ,  F15B2211/515320130101 ,  F15B2211/51320130101 ,  F15B2211/3155820130101 ,  F15B2211/4158120130101 ,  F15B2211/32720130101 ,  F15B2211/42620130101 ,  F15B2211/32920130101 ,  F15B2211/42820130101 ,  F15B2211/41320130101 ,  F15B2211/5054520130101 ,  F15B2211/63520130101 ,  F15B2211/311120130101 ,  F15B2211/4058420130101 ,  F15B2211/47320130101 ,  F15B11/024 ,  F15B2211/305820130101 ,  F15B2211/4059220130101 ,  F15B11/0445 ,  F15B2211/5058120130101 ,  F15B2211/3050520130101

Abstract: Descent control device for a hydraulic cylinder, comprising:
a first conduit (2), connectable to a first chamber (C1) of a cylinder (C);
a second conduit (3), connectable to a second chamber (C2) of the cylinder (C);
a control valve (4), arranged along the first conduit (2) and movable between a closed configuration and an open configuration;
a compensating valve (6), arranged along the first conduit (2) upstream of the control valve (4) with respect to the flow coming from the first chamber (C1);
wherein the compensating valve (6) comprises a control chamber (6a) and a chamber (6b);
a first driving conduit (61), connected to the first conduit (2), in a section downstream of the compensating valve (6) and upstream of the control valve (4) with respect to the flow coming from the first chamber (C1), and connected to the control chamber (6a).