Hand-held power tool with an anti-theft device

• US 20120111589A1
• Filed: 08/09/2011
• Published: 05/10/2012
• Est. Priority Date: 08/10/2010
• Status: Abandoned Application

• Current Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Original Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Inventors: Schmidt, Peer, Wirz, Thomas
• Application Number:
  US13/136,713
• Publication Number:
  US 20120111589A1
• Time in Patent Office: Days
• US Class Current: 173/1
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Abstract

A control method for a hand-held power tool, in response to the actuation of a main switch of the hand-held power tool, carries out the following steps. An identification of transponders in the vicinity of the hand-held power tool is requested in that a transmitter transmits a radio signal. The identification of the at least one responding transponder is received by a receiver. The received identifications are compared to one or more identifications that are stored in a memory unit. The hand-held power tool is switched on if at least one of the identifications stored in the memory unit matches at least one of the received identifications.

Claims

1. A control method for a hand-held power tool, the hand held power tool, in response to actuation of a main switch of the hand-held power tool, or in response to the hand-held power tool being connected to a power source, carries out the following steps:

requesting identification of transponders in a vicinity of the hand-held power tool via a transmitter transmitting a radio signal;

receiving the identification of the at least one responding transponder via a receiver;

comparing the received identifications to one or more identifications stored in a memory unit; and

releasing an activation of the hand-held power tool by an evaluation unit if at least one of the identifications stored in the memory unit matches at least one of the received identifications.

2. The control method as recited in claim 1 further comprising, when an operating element is actuated, the following steps are carried out:

requesting identification of the transponders in the vicinity of the hand-held power tool via the transmitter transmitting a further radio signal;

receiving identifications of any responding transponders via the receiver;

comparing received identification to the identifications stored in the memory unit; and

storing the received identifications in the memory unit if at least one of the identifications stored in the memory unit matches at least one of the received identifications.

3. The control method as recited in claim 1 wherein a timer is reset if at least one of the identifications stored in the memory unit matches at least one of the received identifications, and, in response to the actuation of a main switch of the hand-held power tool, the hand-held power tool is switched on, irrespective of whether at least one of the identifications stored in the memory unit matches at least one of the received identifications, as long as a period of time specified by the timer has not yet ended.

4. The control method as recited in claim 1 wherein, when a reset mode is selected by the user, an encoding unit generates a code, a display unit outputs the code, and the encoding unit prompts the evaluation unit to release the activation of the hand-held power tool when a user enters a correct release code in response to the code that has been output.

5. A hand-held power tool comprising:

a main switch for operating the hand-held power tool;

an anti-theft device comprising a transmitter transmitting a radio signal to transponders in order to request an identification, a receiver receiving a radio signal with the identification of the transponders, an evaluation unit emitting a release signal if one of the received identifications matches the identifications stored in a memory unit, and otherwise emitting a blocking signal; and

a switch, the switch, in response to the blocking signal, preventing the hand-held power tool from being operated.