https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=84724&pn=482,530 Boring Apparatus Patentee: Frederick H. Kind - Racine, Racine County WI Granted:1952-04-15

This Boring Apparatus was patented in the U. S., patent #2,519,476. Abstract: The object of the invention is to provide an eccentrically adjustable boring bar and control means for the same whereby roughing, semi-finishing, and finishing boring operations with a single bar provided with a plurality of cutters may be readily accomplished. A further object of the invention is to provide a pivotally mounted boring bar mounted on a spindle provided with a sliding actuating sleeve or cam for angularly shifting the cutters of the bar and holding them in an adjusted position, the shifting mechanism for said bar including a member adapted to be moved to predetermined set positions. Claim: In a boring apparatus in which the work and a boring member are given a reciprocatory and rotary movement relative to each other, the combination with said boring member provided with relatively fixed roughing and finishing cutters projecting from diametrically opposite sides of said member, of a support for pivotally mounting said member for eccentric positioning relative to the work, means for angularly shifting said member about its pivot in diametrically opposite directions comprising a shiftable sleeve cam member operatively engageable with a part of said boring member, and means for longitudinally shifting said cam member in opposite directions to shift said boring member with its cutters in diametrically opposite directions to bring the different cutters successively into operative relation with the wall of the work being bored.
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