Helicopter dolly
CA 2024911 A1 · Owner: Gorham, Danial S. · Inventors: Gorham, Danial S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A simple, lightweight dolly for carrying a helicopter includes a skeletal frame, large wheels supporting the frame at its front and rear ends, a handle/tow bar at the front end of the frame connected to the front wheels by a linkage including sprockets and a chain so that turning of the handle results in turning of the front wheels a drive, including a hydraulic motor and differential gearing connecting the motor to a shaft carrying the rear wheels for driving the dolly, a platform connected to the frame by pivot arms for movement of the platform between a lower rest, position on the frame and an elevated load carrying position a hydraulic cylinder on the frame for raising and lowering the …
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 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 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.