Stock material or miscellaneous articles – All metal or with adjacent metals – Nonplanar – uniform-thickness material having symmetrical...
Patent
1980-09-15
1984-03-13
O'Keefe, Veronica
Stock material or miscellaneous articles
All metal or with adjacent metals
Nonplanar, uniform-thickness material having symmetrical...
428598, 193 2R, 193 3, 193 6, 193 29, 198656, 198657, 52 11, 52 12, 52730, 52731, B65G 1560
Patent
active
044365187
ABSTRACT:
A flanged trough is provided having flanges along each side of the trough with a smooth continuous curve between the flanges and the body of the trough and a bar of metal welded along the underside of each longitudinal edge of the metal sheet before the flanges are formed. The junction between the metal bars and the flanges and the welds can be covered with a sealant to form a sanitary seal. A lid and gasket can be placed over the trough to seal the contact area of material in the trough from the junction between the metal bars and the flanges of the trough to form a weather tight, dust tight and gas tight conduit.
REFERENCES:
patent: 687059 (1901-11-01), Pelton
patent: 1133692 (1915-03-01), Adams
patent: 2528679 (1950-11-01), Ballard et al.
patent: 3227261 (1966-01-01), Hawley
patent: 3433269 (1969-03-01), Sackett, Sr.
patent: 3508405 (1970-04-01), Koch
patent: 4090604 (1978-05-01), Reifert
American Welding Society, Welding Terms and Definitions, AWS A30-76, Miami, Fla., 1976.
O'Keefe Veronica
Pope III John D.
Weber Edward R.
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