Power tool having rotary input control
US-9211636-B2 · Dec 15, 2015 · US
Power screwdriver
US8985237B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8985237-B2 |
| Application number | US-201113163380-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 17, 2011 |
| Priority date | Jun 18, 2010 |
| Publication date | Mar 24, 2015 |
| Grant date | Mar 24, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A power screwdriver is disclosed, having a drive for driving a tool spindle having a controller for controlling the drive, having a monitoring device for monitoring the rotation speed or the torque, and having a monitoring device for monitoring a switch-off criterion, which monitoring device is coupled to the controller, in order to switch off the drive when the switch-off criterion is reached, with the controller being programmed such that (a) the drive is first of all accelerated until the rotation speed has reached a specific first rotation speed; (b) if the rotation speed then falls by at least a specific amount within a specific time increment, or the torque rises by at least a specific amount within a specific time increment, the drive is braked until the rotation speed has reached a specific second rotation speed, which is lower than the first rotation speed; (c) the drive is then regulated at the second rotation speed for a specific time; and (d) after step (c), the drive is accelerated again at most until the rotation speed reaches the first rotation speed.
First claim
Opening claim text (preview).
What is claimed is: 1. A power screwdriver comprising: a drive for driving a tool spindle; a controller for controlling said drive; a first sensor for monitoring a rotation speed or a torque; and a second sensor for monitoring a switch-off criterion, said second sensor being coupled to said controller for switching off said drive when said switch-off criterion is reached, wherein said controller is programmed such that when fastening one screw connection: (a) said drive is…
Assignees
Inventors
Classifications
- B25B23/14Primary
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US8985237B2 cover?
- A power screwdriver is disclosed, having a drive for driving a tool spindle having a controller for controlling the drive, having a monitoring device for monitoring the rotation speed or the torque, and having a monitoring device for monitoring a switch-off criterion, which monitoring device is coupled to the controller, in order to switch off the drive when the switch-off criterion is reached,…
- Who is the assignee on this patent?
- Kaufmann Michael, Fein C & E Gmbh
- What technology area does this patent fall under?
- Primary CPC classification B25B23/14. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).