EP 0421977 B1 19940112 - Mobile extensible working platform.
Title (en)
Mobile extensible working platform.
Title (de)
Höhenverstellbarer Gerüstwagen.
Title (fr)
Plate-forme de travail mobile extensible.
Publication
Application
Priority
- AT 200089 A 19890824
- AT 276589 A 19891205
Abstract (en)
[origin: EP0421977A2] A catenary vehicle using a working platform which can be raised and lowered comprises, for extending the working platform (4), four lifting columns each having hydraulically driven members capable of moving telescopically relative to one another. In this arrangement, each lifting column can be adjusted by in each case one stationary, vertically arranged toothed chain (21) running over in each case one chain wheel (29) and two pressure rollers (20), the chain wheels (29) for two respective lifting columns (3a, 3b) being rigidly mounted on a shaft (19). In addition, an additional chain wheel (29) is rigidly mounted on each shaft (19), and a first shaft (19) is connected to a second shaft (19) by means of a chain (8a and 8b respectively). The parallel position of the working platform 4 with respect to the reference plane is guaranteed by the invention without having to use an additional parallel-guiding device. <IMAGE>
IPC 1-7
IPC 8 full level
E04G 1/22 (2006.01)
CPC (source: EP)
E04G 1/22 (2013.01)
Designated contracting state (EPC)
AT CH DE IT LI
DOCDB simple family (publication)
EP 0421977 A2 19910410; EP 0421977 A3 19910925; EP 0421977 B1 19940112; AT E100172 T1 19940115; CS 404690 A3 19920115; DE 59004214 D1 19940224; HU 206658 B 19921228; HU 905327 D0 19910228; HU T58648 A 19920330
DOCDB simple family (application)
EP 90890244 A 19900816; AT 90890244 T 19900816; CS 404690 A 19900817; DE 59004214 T 19900816; HU 532790 A 19900824