Security door apparatus

Details Security door apparatus Security door apparatus

2007-01-23

2007-01-23

Purol, David (Department: 3634)

Flexible or portable closure, partition, or panel

Plural and/or with rigid closure

Diverse types

C049S070000

Reexamination Certificate

active

10807586

ABSTRACT:
The entrance security door apparatus has the object of providing security for the receiver in a condominium, etc., when the receiver must confirm an unexpected visitor, etc., by opening and closing a door such as entrance door. A locking tool is provided so that the door can be opened and closed to the side end side of a door opening frame, wherein the security door apparatus comprises: one side end part of an auxiliary door having a predetermined narrow width is connected to the inner side of the open/close side of the door and the other side end part of the auxiliary door is connected to the inner part of the side end of the open/close side of the door opening frame, and the auxiliary door is linked in such a manner that. When the door is opened, the auxiliary door functions as a barrier in the opening part between the door and the door opening frame. The auxiliary door is formed to have a lattice-shape shape, etc., so that the receiver can visually confirm the outside from the interior.

REFERENCES:
patent: 1204833 (1916-11-01), Warfel
patent: 1479312 (1924-01-01), O'Harrow
patent: 2455112 (1948-11-01), Christison
patent: 2537896 (1951-01-01), Hinton et al.
patent: 4103458 (1978-08-01), Booker
patent: 4589463 (1986-05-01), Ryan
patent: 5660144 (1997-08-01), Venti
patent: 5927011 (1999-07-01), Sickenius
patent: 6089302 (2000-07-01), Britt
patent: 6357509 (2002-03-01), Lamazares
patent: 9-317347 (1997-12-01), None
patent: 10-227186 (1998-08-01), None

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