EP 4127452 A1 20230208 - HYDRAULIC PISTON WITH A DEPRESSURISED RECESS
Title (en)
HYDRAULIC PISTON WITH A DEPRESSURISED RECESS
Title (de)
HYDRAULISCHER KOLBEN MIT EINER UNTERDRUCK-VERTIEFUNG
Title (fr)
PISTON HYDRAULIQUE À GORGE DÉPRESSURISÉE
Publication
Application
Priority
- FR 2003152 A 20200330
- FR 2021000028 W 20210318
Abstract (en)
[origin: CA3171713A1] The hydraulic piston with a depressurised recess (1) may translate in a cylinder (2) and comprises a fixed skirt (3), an axial compression face (4) which forms a fluid chamber (5) with the cylinder (2), and an axial working face (6) which cooperates with the transmission means (7), the piston (1) also comprises sealing means (8), a depressurised radial recess (9) opening at the surface of the fixed skirt (3), an axial decompression duct (11) arranged inside the skirt (3) and which opens near the axial working face (6), and a radial decompression duct (12) which puts the depressurised radial recess (9) in communication with the axial decompression duct (11).
IPC 8 full level
F03C 1/28 (2006.01); F03C 1/06 (2006.01); F04B 1/124 (2006.01); F04B 1/20 (2006.01); F04B 1/2014 (2006.01); F04B 53/14 (2006.01); F04B 53/18 (2006.01)
CPC (source: EP KR)
F03C 1/0605 (2013.01 - EP KR); F03C 1/0636 (2013.01 - EP); F03C 1/0644 (2013.01 - EP KR); F04B 1/124 (2013.01 - EP KR); F04B 1/20 (2013.01 - EP); F04B 1/2014 (2013.01 - EP KR); F04B 53/143 (2013.01 - EP KR); F04B 53/18 (2013.01 - EP KR)
Citation (search report)
See references of WO 2021198572A1
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)
FR 3108690 A1 20211001; FR 3108690 B1 20220304; AU 2021249497 A1 20221013; CA 3171713 A1 20211007; CN 115315576 A 20221108; EP 4127452 A1 20230208; JP 2023519595 A 20230511; KR 20220160002 A 20221205; WO 2021198572 A1 20211007
DOCDB simple family (application)
FR 2003152 A 20200330; AU 2021249497 A 20210318; CA 3171713 A 20210318; CN 202180023447 A 20210318; EP 21718637 A 20210318; FR 2021000028 W 20210318; JP 2022559340 A 20210318; KR 20227034285 A 20210318