Manufacturers Index - Fenlind Engineering Co.; Rock Mill, Inc.
Fenlind Engineering Co.; Rock Mill, Inc.
Rockford, IL, U.S.A.
Manufacturer Class:
Wood Working Machinery & Metal Working Machinery
This page contains information on patents issued to this manufacturer.
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If you find a patent number or patent date by this manufacturer that is not on this
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USPTO's for finding information on machinery patents.
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772,246
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Jun. 04, 1953
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Improvements in and relating to lapping machines
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Karl L. Lindmark |
Loves Park, IL |
This patent is highly unusual for not listing or mentioning an inventor. The patent was applied for by the assignee, Fenlind Engineeing Co. We determined the inventor from the equivalent U.S. patent, 2,663,978 and a subsequent improvement, U.S. patent 2,751,723. |
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2,663,978
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Dec. 29, 1953
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Lapper for carbide tipped tools
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Karl L. Lindmark |
Loves Park, IL |
This lapping machine was also patented as British patent 772,246, and was subsequently improved in patent 2,751,723.
"The principal object is to provide a machine incorporating a wheel of medium-large diameter having a wide flat rim with a smooth, true periphery for an endless belt of abrasive material that is kept evenly tensioned and running true while drives by means of a smaller motor-driven pulley, the wheel and belt thereby cooperating to provide an endless yielding precision lapping surface to lap or polish on the arcuate contour of the wheel to obtain a micro-finish on the tip of a cemented carbide tool bit accurately to a predetermined angle determined by the setting of a horizontal tool support at a predetermined elevation with respect to the working face of the wheel..." |
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2,751,723
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Jun. 26, 1956
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Lapper for carbide tipped tools
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Karl L. Lindmark |
Loves Park, IL |
Improvements to patent 2,663,978. See also British patent 772,246. |
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2,804,726
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Sep. 03, 1957
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Backstand idler
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George W. Johnson |
Rockford, IL |
"This invention relates to a new and improved backstand idler for use with the endless belt used on grinding and polishing machines..." |
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3,509,667
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May. 05, 1970
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Method of grinding welded rail
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Karl L. Lindmark |
Rockford, IL |
The inventor had co-founded milling machine maker Fenlind, Inc. This patent implies that Lindmark had left Fenlind by 1966. See also patent 3,566,546, which was part of the original 1966 patent application. |
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3,566,546
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Mar. 02, 1971
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Apparatus for grinding welded rail
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Karl L. Lindmark |
Rockford, IL |
The inventor had co-founded milling machine maker Fenlind, Inc. This patent implies that Lindmark had left Fenlind by 1966. See also patent 3,509,667, which was part of the original 1966 patent application. |
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4,318,324
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Mar. 09, 1982
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Cutting machine with guard for cutting blade
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Craig L. Lindmark |
Rockford, IL |
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Cutting machine with guard for cutting blade
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Stephen R. Hall |
Rockford, IL |
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