Portable battery-operated tool with an electrical buffer element and method for replacing the rechargeable battery

• US 9,776,309 B2
• Filed: 12/22/2011
• Issued: 10/03/2017
• Est. Priority Date: 12/29/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Fluhrer, Andreas
• Primary Examiner(s): Shakeri, Hadi
• Application Number:
  US13/334,653
• Publication Number:
  US 20120167721A1
• Time in Patent Office: 2,112 Days
• Field of Search: 173 1, 173 2, 173 11, 173 52, 173157, 192 34, 320166, 320128, 320167, 320107, 320112-115, 310 47, 310 50, 81479
• CPC Class Codes: B25B 21/00 Portable power-driven screw or nut setting or loosening tools; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; for mounting or dismounting wheels B60B29/006; Attachments for drilling apparatus serving the same purpose machines B23P19/06
• CPC Class Codes: B25B 23/14 Arrangement of torque limiters or torque indicators in wrenches or screwdrivers couplings for transmitting rotation or clutches F16D; devices for measuring torque per se G01L
• 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 portable and battery-operated tool for machining a workpiece and to a method for replacing the rechargeable battery of the tool is disclosed. The tool has at least one drive device for driving a working head, at least one rechargeable battery for providing electrical energy, at least one control device with an operating system for controlling and/or regulating machining parameters, at least one storage device for storing machining data and at least one transmitting and receiving device for transmitting and/or receiving the machining data and also at least one substantially electrical element for storing electrical energy at least for a short time in order to make it possible to replace the rechargeable battery when the operating system is activated.

Claims

1. A portable tool for machining a workpiece, the tool comprising:

a drive device configured to drive a working head;

a rechargeable battery configured to provide electrical energy to the drive device;

a storage device configured to store machining data;

a transmitting and receiving device configured to transmit and receive the machining data to and from a central control device;

an electrical element configured to provide electrical energy while the rechargeable battery is removed; and

a control device having an operating system for controlling machining parameters of the tool, the control device being configured to;

detect a removal of the rechargeable battery from the tool;

operate a switch to connect the electrical element to the control device and disconnect the rechargeable battery from the control device in response to detecting the removal;

store the machining data in the storage device in response to detecting the removal; and

change to a standby operating state after storing the machining data in the storage device, the storage device being unable to store new machining data in the standby operating state, the transmitting and receiving device being unable to transmit and receive the machining data in the standby operating state, a wireless link between the transmitting and receiving device and the central control device being maintained in the standby operating state.

2. The tool of claim 1, wherein the electrical element is a capacitor.

3. The tool of claim 1, wherein the tool is a battery-operated handheld screwdriver.