Patent · US Active

Hand-held power tool

US10718643B2 · kind B2 · utility

0Cited by

3References

4Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Egon Koenigbauer · Eichenau, DE
Hans Appel · Penzberg, DE

Key dates

Filing date	Jul 12, 2016
Grant date	Jul 21, 2020
Priority date	—
Expiry date	Feb 15, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG01F1/74
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A suction module for a hand-held power tool includes a motor-driven fan wheel, an intake channel for sucking in dust-laden air, and a collecting container for dust. A flow sensor has a sensor surface, which is formed of plastic and is arranged in the intake channel, an electric field meter facing the sensor surface for determining the electrostatic field strength on the sensor surface, and an evaluating unit for determining a flow rate of dust-laden air on the basis of the determined electrostatic field strength.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.