4. Movable or removable closures
  5. Time controlled
  6. Predetermined delay governs start of closure movement

McKeon Rolling Steel Door Company, Inc.

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Obstruction-responsive brake actuator for fire door or the like

Flexible or portable closure – partition – or panel – Roll type – With rotating means
Patent

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Self-closing fire door

Flexible or portable closure – partition – or panel – Automatic control – With starting or driving means
Patent

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Self-closing fire door

Flexible or portable closure – partition – or panel – Automatic control – With starting or driving means
Patent

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Time delay release mechanism for a fire barrier

Movable or removable closures – Time controlled – Predetermined delay governs start of closure movement
Patent

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Time delay release mechanism for a fire barrier

Movable or removable closures – Time controlled – Predetermined delay governs start of closure movement
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

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