Escalator handrail obstruction device with sensors
CA 2025625 C · Owner: Moldenhauer, Detlev B. · Inventors: Abraham, Detlev; Herrmann, Dietrich; Adrian, Willy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a safety device for use on the reentry housing of an escalator handrail. More particularly, the device of this invention is operable to sense longitudinal and radial forces occurring in the area of the reentry housing, and is further operable to turn the escalator off in appropriate cases.
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 September 18, 1990 and granted June 14, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2012.
- 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.