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US 5,311,089 AGranted
Hand machine tool
AssigneeRobert Bosch GmbH
InventorsEckerhard Stroetgen, Eberhard Prahst
Life of this patent
Estimating the term…
Abstract
A hand machine tool has an electric motor, a radial fan driven by the electric motor and having an aspirating region and a stationary pre-spin grate located in the aspirating region of the radial fan directly upstream the radial fan as considered in an air flow direction and formed so that a supply air to the radial fan is deviated against a rotary direction of the radial fan.
Claims13
A hand machine tool, comprising a machine housing;
- an electric motor;
- a radial fan driven by said electric motor and having an aspirating region;
- and a non-rotatable pre-spin grate located stationarily relative to said machine housing in said aspirating region of said radial fan directly upstream said radial fan as considered in an air flow direction and formed so that a supply air to said radial fan is deviated against a rotary direction of said radial fan.
Dependencies are inferred from the claim text.