Patent ID: 9573199
Date: 2017-02-21
CPC Classifications: B23B,B27B,B28D,Y10T

Claim:
1. A bolt on drive assembly for a core drill comprising: a cylindrical tube having a cutting edge at one longitudinal end and an open end at an opposite longitudinal end; a mounting means mounted at said open end; a high strength spoked reinforcer, said spoked reinforcer having a center hub from which extends a plurality of spoked members, said spoked members having a strengthening member extending perpendicularly therefrom in the direction of the Z-axis and wherein said spoked members are attached to said mounting means wherein said center hub has a recessed portion that is substantially circular in shape on a side spaced apart from said spoked members; a disc mounted onto said high strength spoked reinforcer and also onto said mounting means wherein said disc includes a center aperture corresponding to said recessed portion in said center hub; a drive connection centrally mounted on said disc, said drive connection adapted to connect to a drive shaft to cause rotation of said tube; a series of removable fasteners to secure said disc and said high strength spoked reinforcer to said mounting means such that the one longitudinal end is spaced longitudinally from the high strength spoked reinforcer; and wherein the recessed portion includes a plurality of slots in a periphery of the recessed portion.