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US 6,887,143 B2Granted
Sanding hand machine tool
AssigneeRobert Bosch GmbH
InventorsSabine Bocka, Uwe Engelfried
Life of this patent
Estimating the term…
Abstract
A power grinder, in particular an oscillating grinder (10), includes a platelike grinding sheet holder (14), on whose working face (15) a grinding sheet (16) can be braced. Secure clamping of the grinding sheet and easy changing of the grinding sheet are provided, because the grinding sheet (16) can be inserted between the clamping jaw (22) and the grinding sheet holder (14)—counter to the elastic prestressing of the clamping jaw (22)—and is firmly held increasingly strongly counter to the insertion direction in proportion to the tensile force engaging it.
Claims7
A power grinder (10), comprising:
- a grinding sheet holder (14) having the shape of a plate and a working face (15), wherein a grinding sheet (16) is supported on the working face (15);
- clamping means disposed on the grinding sheet holder (14) at a pivot shaft (24) on a bearing block (28), wherein opposite grinding sheet ends (17, 19) are firmly held on the grinding sheet holder (14) by said clamping means, the clamping means including a two-armed clamping lever (20) having a swinging arm (21) at one side of said pivot shaft, and a clamping jaw (22) supported pivotably about the pivot shaft at another side thereof bracing the grinding sheet on said grinding sheet holder (14), the clamping jaw being elastically biased towards a clamping direction against which the grinding sheet is insertable between the jaw and the sheet holder,
- whereby upon motion counter to the insertion direction, the grinding sheet ends are locked by an outer contour (27) of the clamping jaw (22) that extends convexly from the pivot shaft (24) and a detent face (23) of the grinding sheet holder (14).
Dependencies are inferred from the claim text.