4. Movable or removable closures
  5. Plural wings radiate from common pivot; i.e., revolving
  6. Wings fold for through passage

Helmut H. Bunzl

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Balanced sliding door structure

Movable or removable closures – Mounted for optional movements – Pivot mounted on sliding member; e.g. – slide-stile
Patent

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Electro-mechanical pivot wing drive for pivoting wings of doors

Motors: spring – weight – or animal powered – Spring – With winding means
Patent

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Revolving door

Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Wings fold for through passage
Patent

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Profile ID: LFUS-PAI-P-605743

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