B - Operations – Transporting – 21 – G
Patent
B - Operations, Transporting
21
G
B21G 1/12 (2006.01) B24B 19/16 (2006.01) B24B 41/00 (2006.01) B24D 7/18 (2006.01)
Patent
CA 2131482
ABSTRACT Apparatus for grinding tapers and points on elongated needle workpieces having frame means and needle workpiece transport means associated with the frame means for transporting a plurality of the workpieces. The workpiece transport means has a predetermined curvature and workpiece feeder means is mounted adjacent the frame means for feeding workpieces to the workpiece transport means. The grinding means is preferably a grinding wheel disposed adjacent the workpiece transport means to engage workpieces while supported by workpiece supporting means and has a major diameter at a first end and a minor diameter at a second end, the major diameter being greater than the minor diameter. The diameters are connected by a curved grinding surface the diameter of which increases progressively therebetween. The curvature of the grinding wheel in the first third portion between the major and minor diameters is of greater mean curvature than the mean curvature of the corresponding opposed portion of the workpiece transport means. The second third portion of the grinding wheel is of greater mean curvature than the mean curvature of the corresponding opposed portion of the workpiece transport means. The mean curvature difference therebetween is less than the difference of the first portion with respective to the first portion's corresponding opposed portion of the workpiece tranport means, and the third portion being of lesser mean curvature than the corresponding opposed portion of the workpiece transport means such that a surface portion of a workpiece which contacts the grinding surface varies relative to the position of the workpiece with respect to the grinding surface. A method of grinding needle workpieces is also disclosed.
Cybart Eugene P. Jr.
Munoz Marcelino P.
Samsel W. Scott
Mcfadden Fincham
United States Surgical Corporation
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