EP 4081714 A1 20221102 - WORKING CYLINDER WITH CUSHIONED END-STROKE
Title (en)
WORKING CYLINDER WITH CUSHIONED END-STROKE
Title (de)
ENDLAGENGEDÄMPFTER ARBEITSZYLINDER
Title (fr)
CYLINDRE DE TRAVAIL À AMORTISSEMENT EN POSITION FINALE
Publication
Application
Priority
- DE 202019005218 U 20191223
- DE 2020000339 W 20201218
Abstract (en)
[origin: WO2021129900A1] The invention relates to a working cylinder with a cushioned end-stroke. The piston unit has a piston main part and a ring body. The exterior of the ring body receives a piston ring with a piston ring gap, and the ring opening of the ring body receives a guiding pin of the piston main part, wherein a ring gap is formed between the ring body and the guiding pin, and the ring body has axial and radial play relative to the piston main part. The ring body has an axial ring surface on the piston main part side, and the piston main part has an axial counter ring surface on the ring body side opposite the axial ring surface. The piston unit is designed such that during an inward movement into the cushioning zone, the piston ring passes axially over the pressure medium connection and the piston unit encloses a damping pressure medium volume, and the the piston unit is designed to be in a first operating state during an inward movement and a second operating state during an outward movement. In the first operating state, the axial ring surface on the piston main part side and the axial counter ring surface ring body side lie against each other and form a seal plane, and the piston ring gap is configured for a throttled outflow of the damping pressure medium volume; and in the second operating state, the axial ring surface on the piston main part side and the axial counter ring surface ring body side have an axial gap for a pressure medium inflow.
IPC 8 full level
F15B 15/14 (2006.01); F15B 15/22 (2006.01)
CPC (source: EP US)
F15B 15/1452 (2013.01 - EP US); F15B 15/224 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 202019005218 U1 20210324; CN 114829787 A 20220729; DK 4081714 T3 20240226; EP 4081714 A1 20221102; EP 4081714 B1 20231122; JP 2023506142 A 20230215; US 11953033 B2 20240409; US 2023011362 A1 20230112; WO 2021129900 A1 20210701
DOCDB simple family (application)
DE 202019005218 U 20191223; CN 202080088516 A 20201218; DE 2020000339 W 20201218; DK 20848691 T 20201218; EP 20848691 A 20201218; JP 2022532012 A 20201218; US 202017787675 A 20201218