Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Outside corner or peripherally bordered
Patent
1988-08-17
1990-07-03
Scherbel, David A.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Outside corner or peripherally bordered
52729, 52781, E04C 238
Patent
active
049379968
ABSTRACT:
A metal frame arrangement (20, 21), for use as or in door frames, window frames (22), window casements (23) or the like, comprising a frame made of concave metal profile. The frame comprises two pairs of mutually opposite frame portions which are angled at right angles relative to the adjacent neighboring frame portion. The frame (20, 21) is made into a coherent piece in a longitudinal continuous and sectionally angled contour, by means of local cavities in the metal profile and longitudinal deformation of locally uncovered portions of the metal profile, the deformation by means of the material of the metal profile forming angle reinforcing and angle bracing means (32', 38) just by the apex of the angle between two neighboring frame portions.
A process for the production of the metal frame comprises that cavities in a side portion or side portions of the profile are removed, after which a section of web portion (20c) or one web portion (21f) of the profile uncovered by the cavity is finished to form an angle bracing and angle reinforcing means (32', 38) for establishing frame portions angled at right angles relative to each other. The angle bracing is effected simultaneously with the undertaking of the angle bending of the frame plate.
REFERENCES:
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patent: 3537212 (1970-11-01), Gilles
patent: 3802105 (1974-04-01), Bendix
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patent: 4073177 (1978-02-01), Leroux
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patent: 4269255 (1981-05-01), Nailor et al.
patent: 4479737 (1984-10-01), Bergh et al.
patent: 4562677 (1986-01-01), Hrabak
A/S Spilka Inco Ltd.
Mai Lan
Scherbel David A.
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