Apparatus and method for improving the control of a concrete screed head assembly
CA 2715666 C · Owner: Somero Enterprises, Inc. · Inventors: Anderson, Frank E.; Quenzi, Philip J.; Kieranen, Carl B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A soft landing control system (10) for a screeding device (12) is operable to automatically lower a vibrating member (24) of a screed head assembly (14) into engagement with a concrete surface at a time and place where the vibrating member is not positioned over an overlap area of already screeded concrete. The vibrating member is automatically lowered onto newly placed concrete at or near the junction or cold-joint between the already screeded concrete and the area of newly placed concrete so as to avoid depressions in the already placed concrete. Optionally the soft landing control system may include a timing device and may lower the vibrating member after a period of time following an …
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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 March 19, 2004 and granted April 16, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2026.
- 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
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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.