Apparatus for opening and closing roll-up door
CA 1286591 C · Owner: Taylor, Douglas B. · Inventors: Taylor, Douglas B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rolling door mechanism employs an idler drive member freely supported about an idler roll of a roll door assembly; an adjusting element for, example, a coiled spring which surrounds the idler roll, accommodates differences in speed of the idler drive member and the idler roll; the adjusting element is connected at one end for rotation with the idler drive member and at the other end for rotation with the idler roll.
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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 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.