Tightening device
CA 2205829 A1 · Owner: Morokoshi, Hiroshi · Inventors: Fukuda, Hiroyuki; Hirao, Keiji; Yamaji, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a device for tightening up a plurality of threaded members at the same time with proper torque without necessitating the cumbersome procedure of rotating the members one by one through a specified small angle at a time and without unequivalent tightening of the members. The tightening device 1 comprises two rotary shafts 6 each provided at a forward end thereof with a wrench portion 8 fittable to the threaded member 44 motors 3 for individually driving the rotary shafts 6 and a control unit 9 for detecting the tightening torque of each threaded member 44 and controlling the motor 3 based on the detected value to ensure proper tightening. The control unit 9 checks the …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.