Metal working – Method of mechanical manufacture – Structural member making
Patent
1989-11-29
1990-11-06
Hall, Carl E.
Metal working
Method of mechanical manufacture
Structural member making
295275, 2989734, 52 45, 72256, B23P 1700
Patent
active
049674730
ABSTRACT:
A bow beam, as well as a method of making the beam for the roof of truck trailer, is described as being initially extruded in a U-shape with a flat web which is heavier than a pair of legs which extend from the web. The extruded beam is then placed in a press where the free ends of the legs are bent to form a bow in the topside of the beam in spaced relation from the flat bottom web. Thus, the strength of the beam is optimized with a minimal amount of material.
REFERENCES:
patent: 3164898 (1965-01-01), Kotrbaty
Arbes Carl I.
Hall Carl E.
Hummer Harlan E.
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