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1. (WO2004003076) DRIVE DEVICE FOR OPENING OR CLOSING A DOOR OR SIMILAR

Pub. No.:    WO/2004/003076    International Application No.:    PCT/EP2003/006619
Publication Date: Jan 8, 2004 International Filing Date: Jun 24, 2003
IPC: C08L 59/02
E05D 15/52
E05F 3/04
E05F 3/10
Applicants: DORMA GMBH + CO. KG
SALUTZKI, Thomas
Inventors: SALUTZKI, Thomas
Title: DRIVE DEVICE FOR OPENING OR CLOSING A DOOR OR SIMILAR
Abstract:
The invention relates to a drive device for opening or closing a leaf of a door, a window or similar. Said device comprises a housing (1) and a closing spring (2), which is located in the housing (1) and acts upon a piston (3), the latter co-operating with a closing shaft (4) in the housing (1) by means of gearing. To improve a drive device of this type with respect to the choice of material, the inventive piston (3) and housing (1) consist of polyoxymethylene plastic (POM).