Air tool with torque shut-off valve
CA 1292395 C · Owner: Cooper Technologies Company · Inventors: Podsobinski, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The air tool of the present invention includes a torque shut-off valve totally enclosed within and substantially coaxial with the body housing of the tool. The torque shut-off valve includes a valve member reciprocally sliding in and guided by a bore and counterbore in the valve body. The valve member is biased by a reset spring to its open position before the tool cycle is initiated. In operation, the valve member is axially biased toward its open position by supply line air pressure in an air inlet chamber in conjunction with controlled reduced air pressure in an associated compartment and is axially biased toward the closed position by motor inlet pressure. A preselected motor back …
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 November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.