E FIXED CONSTRUCTIONS
E06 DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
E06B FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
E06B9/00 Screening or protective devices for; wall or similar; openings, with or without operating or securing mechanisms; Closures of similar construction
E06B9/56 Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
E06B9/68 Operating devices or mechanisms, e.g. with electric drive
E06B2009/689 using end switches