Structure of a door frame

Details Structure of a door frame Structure of a door frame

1996-01-17

1996-12-17

Friedman, Carl D.

Static structures (e.g., buildings)

Openwork; e.g., truss, trellis, grille, screen, frame, or...

Outside corner or peripherally bordered

52211, 52213, 522045, 526569, 49504, 49380, E06B 104

Patent

active

055841570

ABSTRACT:
A structure of a door frame including four rails each formed with a first passage at one side, a second passage at an intermediate portion, a third passage at another side, a first slot at an edge, a second slot at a front side, a third slot at the front side, a fourth slot at another side, and a raised portion at a rear side, four right-angled connectors formed with a first shoulder at one side, a central block, and a second shoulder at another side adapted to be inserted into the first, second and third passages, four auxiliary locking members each fixedly installed into the third passage and having a slot for passage of electrical wires, four fastening posts each formed with a first groove at one side and a second groove at another side adapted to engage with the raised portion of the rails and right-angled connectors, and covering members arranged on the inner sides of the frame.

REFERENCES:
patent: 3774345 (1973-11-01), Cole et al.
patent: 4614068 (1986-09-01), Bergthold
patent: 4621478 (1986-11-01), Phillips et al.
patent: 4899507 (1990-02-01), Mairlot
patent: 4991365 (1991-02-01), Jackson
patent: 5090168 (1992-02-01), Fast et al.
patent: 5293723 (1994-03-01), Slessor

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