Counterweighting arrangements (E06B9/60 takes precedence)

Screening or protective devices for openings, with or without operating or securing mechanisms; Closures of similar construction > Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor > Counterweighting arrangements

Screening or protective devices for openings, with or without operating or securing mechanisms; Closures of similar construction (E06B5/10 takes precedence; wings for doors or windows, connected at their edges, E06B3/48; additional indoor equipment of doors or windows, not forming part of the proper finishing work of a building, e.g. curtains, A47H; gratings as building elements E04C2/24; fastening means E05; operating-mechanisms for wings in general E05F) > Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor (devices of general interest specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material B65H75/34) > Counterweighting arrangements (E06B9/60 takes precedence)