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Manufacturers Index - Buhr Machine Tool Co.
Patents
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 list, please contact the Site Historian.


Key to Links for Patent Information

USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
817,587 Apr. 10, 1906 Machine for drilling nuts and the like Martin Nelson ON, Canada This multiple-spindle drilling machine was sold by Nelson-Blanck Manufacturing Co. as a drilling head accessory. Ads from 1914-1917 feature their two-spindle version; from 1919 to 1921 they also offered versions with 3, 4, 6, 8, 10, or 12, and available in both in-line and circular configurations. The distance between spindles was adjustable. They also offered custom designs. In 1925 it appears that Nelson-Blanck was acquired by Buhr Machine Tool Co. and we assume that firm also manufactured these patent drill heads.
1,075,545 Oct. 14, 1913 Explosive Engine Joseph F. Buhr Detroit, Wayne County, MI
1,392,678 Oct. 04, 1921 Chuck Joseph F. Buhr Detroit, Wayne County, MI
1,394,709 Oct. 25, 1921 Drill Head Joseph F. Buhr Detroit, Wayne County, MI
1,428,002 Sep. 05, 1922 Drill Head for Drilling Machines Joseph F. Buhr Detroit, Wayne County, MI
1,696,468 Dec. 25, 1928 Multiple-spindle drill head Joseph F. Buhr Detroit, MI Buhr Machine Tool Co. specialized in high-speed multi-spindle drilling machines for automotive manufacturing. Their machines tended to be specialized for particular operations such as boring holes in engine blocks for valve guides.
1,700,975 Feb. 05, 1929 Drill Head Joseph F. Buhr Detroit, Wayne County, MI
1,702,810 Feb. 19, 1929 Tapping Chuck Joseph F. Buhr Detroit, Wayne County, MI
1,845,123 Feb. 16, 1932 Collet Means Joseph F. Buhr Ann Arbor, Washtenaw County, MI See also patent #1,934,910.
1,934,910 Nov. 14, 1933 Collet Means Joseph F. Buhr Ann Arbor, Washtenaw County, MI See also patent #1,845,123.
1,973,942 Sep. 18, 1934 Socket Collet Structure Joseph F. Buhr Ann Arbor, Washtenaw County, MI
1,973,943 Sep. 18, 1934 Socket Collet Structure Joseph F. Buhr Ann Arbor, Washtenaw County, MI
2,068,594 Jan. 19, 1937 Bearing Structure for Rotatable Spindles and the Like Joseph F. Buhr Ann Arbor, Washtenaw County, MI
2,078,192 Apr. 20, 1937 Tool Holder Joseph F. Buhr Ann Arbor, Washtenaw County, MI
    Tool Holder Rollo G. Ellis Ann Arbor, Washtenaw County, MI  
2,152,302 Mar. 28, 1939 Lock for Tool Holders Joseph F. Buhr Ann Arbor, Washtenaw County, MI