Escalator
CA 1110194 A · Owner: Westinghouse Electric Corporation · Inventors: Bauer, James A.; Wehrli, Henry A. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An escalator for transporting passengers between upper and lower landings. The escalator includes a flywheel, an overrunning clutch, and a fail-safe friction brake. The overrunning clutch and brake when actuated, applies a braking torque only when the escalator is moving such that it would transport passengers from the upper to the lower landing. The inertia of the flywheel and the braking torque of the brake are predetermined to provide the desired range of deceleration, when the escalator stops in either travel direction, regardless of load.
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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 1998.
- 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.