The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1983
Filed:
Jun. 22, 1981
Stephen N McEwen, Bowling Green, OH (US);
Robert L Stevens, Bowling Green, OH (US);
Barry R Benschoter, Bowling Green, OH (US);
Robert F Benschoter, Portage, OH (US);
Henry Filters, Inc., Bowling Green, OH (US);
Abstract
The disclosure concerns a smooth continuous steel trough, free of longitudinal weld joints except for a flanged frame attached to its open top for supporting a cover grating. This trough is, for example, of the type embedded in the floor of a factory for the gravity and/or jet flow of contaminated coolants from machining operations. The major steps in the production of such a trough comprise cutting a sheet into equilateral trapezoidal sections in which the tapered sides correspond to the flow pitch of the trough and the narrow base of one section is equal to the longer base of the next successive section; wrapping the center of the trapezoidal sheet around a convex mandrel by a single roll operation; assembling a plurality of said sections by welding their adjacent edges of equal length; welding a flanged frame on the top of the sub-assembly sections; coating the outside of said sections with a rust-inhibiting coating; and installing said sections in a floor in concrete, the sides of which troughs are locked by bent tabs projecting from the deeper coated walls of the trough sections.