Knockdown doorframe and building method thereof

Details Knockdown doorframe and building method thereof Knockdown doorframe and building method thereof

1998-11-26

2001-02-27

Chilcot, Richard (Department: 3635)

Static structures (e.g., buildings)

Framing to receive door, doorjamb, or window sash

Retaining feature between frame and reveal

C052S204100, C052S215000, C052S656400, C052S211000, C049S504000

Reexamination Certificate

active

06192638

ABSTRACT:

BACKGROUND OF THE INVENTION
When building a conventional doorframe for pivotally installing a door within the doorframe, the doorframe should be pre-erected in a construction site and then, the concrete is formed or the bricks are stacked around the doorframe to fix the doorframe with the concrete or brick wall.
However, it has the following drawbacks:
1. The doorframe is pre-erected in the construction site by strut or brace or linkage, which may obstruct the construction or material handling by the workers.
2. The doorframe pre-erected in the site may be easily scratched, impacted, worn, twisted, deformed or damaged during the construction of the building or house.
3. The doorframe is supplied as a fixed doorframe set already fabricated in a factory, thereby lacking of diversity, flexibility or adjustment for the construction.
The present inventor has found the drawbacks of a conventional doorframe and invented the present knockdown doorframe and its building method.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a knockdown doorframe including: a pair of jambs (
1
) respectively secured on a right and left vertical side wall (V) of a door entrance or doorway (O) by means of brackets (
2
) longitudinally pre-fixed on the right and left vertical side walls (V), each jamb (
1
) having a waterproof pad (
3
) cushioned on a bottom of the jamb (
1
), a lintel (
4
) horizontally secured on the top portion of each jamb (
1
) adjacent to a horizontal top wall (H) of the doorway to form an inversed U-shaped doorframe, and each jamb (
1
) and lintel (
4
) having a covering plate (
5
,
5
a
) covered thereon for shielding an aperture (A) between the doorframe and the wall (V, H) of the doorway (O) for decorative purpose.


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