Torque wrench air shut-off
CA 1077313 A · Owner: Rockwell International Corporation · Inventors: Alexander, Robert H.; Thackston, Clyde D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power tool for setting fasteners to a predetermined torque having a novel shut-off means that automatically shuts off the power supply at a predetermined torque, but will not "hang up" in the off position. The shut-off mechanism utilizes a cam surface to store energy in a spring which, when the shut-off point is reached is released to operate a "firing pin" to interrupt the supply of power to the motor of the tool. This is accomplished by using overtravel of the firing pin to trip a latch mechanism to release a shut-off valve. The use of overtravel insures against the tool hanging up on a high point of the cam. The clutch slips upon reaching the set torque and will not over torque no …
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
- Granted May 13, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 1997.
- 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.