Fire rated removable mullion

Details Fire rated removable mullion Fire rated removable mullion

1995-11-27

1998-08-18

Knight, Anthony

Movable or removable closures

Closure mount or stop on independent movable or removable...

74527, 49 8, 49 7, E06B 500

Patent

active

057943826

ABSTRACT:
A fire-rated removable mullion, includes a top fitting mounted to a door frame lintel, a bottom fitting assembly, a mullion head capable of detachably engaging the top fitting, a mullion tube having provisions for mounting between the mullion head and the bottom fitting assembly, and another provision for accommodating thermal expansion of the mullion assembly to resist warping of the assembly. Where desired, a mortise cylinder lock can be included to limit removal by unauthorized persons.

REFERENCES:
patent: 1258638 (1918-03-01), Tomkinson et al.
patent: 2275729 (1942-03-01), Casse
patent: 2275730 (1942-03-01), Casse
patent: 3000062 (1961-09-01), McCandless
patent: 3319382 (1967-05-01), Hand
patent: 4327523 (1982-05-01), Gravely
patent: 5005315 (1991-04-01), Jackson, Jr.
patent: 5435102 (1995-07-01), McCarthy
patent: 5450697 (1995-09-01), Prucinsky et al.
patent: 5471792 (1995-12-01), Higgins et al.

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