EP 3773402 A1 20210217 - LIFTING MECHANISM AND CHAIRS
Title (en)
LIFTING MECHANISM AND CHAIRS
Title (de)
HEBEMECHANISMUS UND STÜHLE
Title (fr)
MÉCANISME DE LEVAGE ET CHAISES
Publication
Application
Priority
- US 201862649809 P 20180329
- US 201862649746 P 20180329
- US 2019023661 W 20190322
Abstract (en)
[origin: WO2020005350A1] A lifting mechanism has a base to which a pivot of a parallelogram structure. A spring extends from a first link of the parallelogram to an adjustable termination point on a second link of the parallelogram to form a lifting triangle. The spring termination point is displaced from a main pivot of the parallelogram to create an adjustable "lever arm" to vary the lifting force. A lifting power adjustment mechanism adjusts the position of the spring termination point. An extension is in fixed relation to one of the parallelogram links and maintains its angle with respect to the horizontal when angles of the parallelogram are varied upon raising or lowering the lifting mechanism between a sitting mode and a standing mode. The extension serves as a base for a rear seat section. A front seat section is pivotally attached to the rear seat section allowing it to swing downward upon elevation of the liftin mechanism.
IPC 8 full level
A61G 5/14 (2006.01); A61G 5/04 (2013.01); A61G 5/12 (2006.01); A61G 7/10 (2006.01)
CPC (source: EP)
A47C 3/30 (2013.01); A47C 7/024 (2013.01); A61G 5/0816 (2016.10); A61G 5/1059 (2013.01); A61G 5/1091 (2016.10); A61G 5/14 (2013.01); A61G 5/125 (2016.10)
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
DOCDB simple family (publication)
WO 2020005350 A1 20200102; AU 2019293477 A1 20201015; CA 3095441 A1 20200102; CN 112004510 A 20201127; CN 112004510 B 20230210; EP 3773402 A1 20210217; EP 3773402 A4 20220105; JP 2021519672 A 20210812; JP 7411628 B2 20240111
DOCDB simple family (application)
US 2019023661 W 20190322; AU 2019293477 A 20190322; CA 3095441 A 20190322; CN 201980022937 A 20190322; EP 19825315 A 20190322; JP 2021502706 A 20190322