Revolving door assembly with foldable door wings

Details Revolving door assembly with foldable door wings Revolving door assembly with foldable door wings

1989-10-13

1991-01-01

Kannan, Philip C.

Movable or removable closures

Plural wings radiate from common pivot; i.e., revolving

Wings fold for through passage

E05D 1502

Patent

active

049809920

ABSTRACT:
A revolving door assembly in which the individual door wings are releasably secured to a central support member, such that the door wings are retained in respective operative positions in which the wings extend substantially radially from the central hub in diametrically opposed pairs. The door wings are releasable from their operative positions in response to the exertion of a predetermined force thereon to allow one or more of the door wings to be rotated about their respective pivot axes to a folded position. The support member has a plurality of arm members projecting substantially radially therefrom. Each door wing is attached to a corresponding arm member by means of a ball and catch mechanism at a distal position relative to the support member. The ball is disengaged from the catch to allow the door wing to swing free of the arm member when a predetermined force is exerted thereon. An elongated bar is positioned between an inner portion of each door wing and the support member for maintaining each door wing substantially in vertical alignment when the door wing is rotated about its pivot axis. Each door wing is pivotally mounted for rotation about first and second pivot axes, which are spaced apart sufficiently to allow the door wings to be substantially completely "bookfolded".

REFERENCES:
patent: 14255 (1917-02-01), Van Kannel
patent: 1007025 (1911-10-01), Ely
patent: 1030266 (1912-06-01), Ramondt
patent: 1536196 (1925-05-01), Dyer
patent: 1983353 (1934-12-01), Ely et al.
patent: 2523980 (1950-09-01), Whiteford
patent: 3782098 (1973-10-01), Scheckells
patent: 3792035 (1974-01-01), Lowe
patent: 3793773 (1974-02-01), Sheckells
patent: 3897651 (1975-08-01), Scheckells
patent: 4565030 (1986-01-01), La Sance

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