Valve indicator post
CA 1096243 A · Owner: Crane Canada Limited · Inventors: Liberman, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An indicator post is disclosed for an underground valve or a valve within a building. The indicator post is an improvement over existing units because it has panoramic windows allowing viewing from almost 360° around the post and includes readily positionable targets for different types of valves. The indicator post has a detachable cap mounted on an outer casing, a rotatable stem member in the casing adapted to be converted to an operating stem of the valve at least two, curved viewing ports extending in a single curve around the cap a curved target carrier within the cap at least one flexible, target strip having a valve position indication thereon adapted, to be wrapped about a portion …
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 February 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 24, 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.