EP 0303996 B1 19930120 - WORKING-CHAIR WITH A TILTABLE SEAT
Title (en)
WORKING-CHAIR WITH A TILTABLE SEAT
Publication
Application
Priority
DE 3727784 A 19870820
Abstract (en)
[origin: US4858993A] A work or office chair having a seat shell which is pivotably arranged on a height-adjustable seat carrier, characterized by the seat shell being spring loaded to oppose tilting of the seat shell from a raised position towards a tilted, lower position. The chair includes a fixing arrangement for fixing the chair in specific tilted positions. One improvement is a spring arrangement for supporting the chair and a toggle arrangement coacting with the spring arrangement for opposing tilting of the chair with the springs of the toggle arrangement and the supporting spring coacting to require a substantial force to cause initial tilting then followed by a gradual force to cause tilting.
IPC 1-7
IPC 8 full level
A47C 1/026 (2006.01); A47C 3/026 (2006.01)
CPC (source: EP US)
A47C 1/026 (2013.01 - EP US); A47C 3/026 (2013.01 - EP US); A47C 7/443 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0303996 A2 19890222; EP 0303996 A3 19890628; EP 0303996 B1 19930120; AT E84686 T1 19930215; DE 3727784 A1 19890302; DE 3727784 C2 19920102; DE 3877656 D1 19930304; US 4858993 A 19890822
DOCDB simple family (application)
EP 88113175 A 19880812; AT 88113175 T 19880812; DE 3727784 A 19870820; DE 3877656 T 19880812; US 23459588 A 19880822