Vertically stackable elevator modules with sealable joints
CA 1330652 C · Owner: Prewer, John R. · Inventors: Prewer, John R.; Power, Leslie B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lift shaft comprises a stack of self-supporting prefabricated shaft modules whereby upper shaft modules are supported on lower modules. The lift shaft is made of one or more plain modules (1), a module in which a fully assembled lift car (2) and/or a not shown counterweight is temporarily supported for transit to the site and erection on site a, fully assembled upper lift motor room module (3) including winding apparatus (4) and electronic equipment (5) for the lift and a pit module (6) suspended from the module above. The lift shaft modules are designed so that they can be used as containers for fully assembled lift cars and/or counterweights between the factory and the building site so …
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 12, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2011.
- 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.