Patent · US Active

Hammer drill

US11285594B2 · kind B2 · utility

1Cited by

3References

8Claims

0Family size

Assignee

BLACK & DECKER INC. · US

Inventors

Rene Gumpert · Straubing, DE
Tim Heimrich · Bad Camberg, DE
Petr Dusik · Idstein, DE

Key dates

Filing date	Feb 21, 2019
Grant date	Mar 29, 2022
Priority date	—
Expiry date	May 9, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/261
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hammer drill is provided including a motor, an electrical power circuit arranged to provide power to the motor, a tool holder arranged to hold a cutting tool, and a drive transmission operable in at least two modes of operation. A mode change mechanism is provided to switch the drive transmission between the at least two modes of operation, and at least one electrical switch is located within the electrical power circuit to provide power to the motor. Hammer drill further includes lock-on mechanism is configured to lock the at least one switch in the closed state when it is activated, a controller configured to control an operation of the motor, and an electrical power circuit configured to provide power to controller. The motor is prevented from operating when no power is provided to the controller.

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