Patent ID: 6988734
Filing Date: 2006-01-24
Classification: B25B,Y10T

Abstract:
1. A rotatable machine comprising: (a) a machine housing; (b) a drive motor received within said machine housing; (c) a drive shaft operatively connected with said drive motor extending from said machine housing, said drive shaft having an output-side end; (d) a tool-receiving element disposed on a section of said drive shaft, said tool-receiving element comprising a shell, at least one radial recess penetrating said shell, and a clamping sleeve for detachably coupling a tool with said drive shaft; wherein said tool-receiving element comprises a multiple-edge longitudinal recess extending from said output-side end into a receiving pin projecting from said drive shaft, said receiving pin comprising a receiving pin shell; wherein at least one locking element is received in said radial recess, said at least one locking element being actuatable into a locking position radially projecting into said tool-receiving element and releasable into an unlocking position for radial yielding; and (e) three locking balls which serve as clamping elements actuated by said clamping sleeve between the locking position and the unlocking position, said locking balls being received in radial recesses uniformly distributed circumferentially over and penetrating said receiving pin shell near a free face end; wherein said clamping sleeve has locking protrusions comprising spherical indentations corresponding to said locking balls for actuating and arresting said locking balls in the locking position.