Screwdriver

Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C081S473000

Reexamination Certificate

active

06892611

ABSTRACT:
It is an object of the invention to provide an electric screwdriver that can efficiently transmit torque for tightening a screw and stop the torque transmission. A representative screwdriver may include a motor, first and second rotating members, a tool, a torque transmission spring and a torque transmission releasing device. The torque transmission spring transmits the rotating torque of the motor from the first rotating member to the second rotating member in order to drive the tool by closely winding around the first rotating member and the second rotating member when the motor drivingly rotates the first rotating member in a predetermined rotating direction. Further, the torque transmission releasing device moves in the axial direction of the first rotating member or the second rotating member in response to the screw-tightening torque. By such movement, the torque transmission releasing device releases the close winding of the torque transmission spring around at least one of the first rotating member and the second rotating member and releases the transmission of the rotating torque of the motor to the tool.

REFERENCES:
patent: 2468193 (1949-04-01), Goff
patent: 2827779 (1958-03-01), Holloway
patent: 4631992 (1986-12-01), Eckman
patent: 4774864 (1988-10-01), Dossier
patent: 5735183 (1998-04-01), Sasaki et al.
patent: 6668690 (2003-12-01), Kikuchi et al.
patent: 61-219581 (1986-09-01), None
patent: 2003-220568 (2003-08-01), None
patent: 2003-266325 (2003-09-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Screwdriver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Screwdriver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screwdriver will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3425446

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.