Self-propelled wheelchair capable of traversing a curb
CA 1063921 A · Owner: Ball, Douglas · Inventors: Ball, Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-propelled wheel-chair capable of climbing up or down a curb is disclosed. The wheel-chair is able to elevate an occupant higher than existing types of wheel-chairs practically to the height of a person standing. The wheel-chair has a seat assembly mounted on a frame, a first pair of drive wheels on a horizontal fixed axis supporting the frame each of the, first pair positioned on either side and below the seat assembly two independent driving means, one for forward and backward rotation of each of the first pair of drive wheels a second, pair of wheels on a common axis parallel to the horizontal fixed axis, the second pair of wheels having drive connecting means with adjacent first …
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 October 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 1996.
- 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.