Linkage apparatus having a mechanism for dampening vibrations
CA 1316357 C · Owner: Johnson (R. M.) Company · Inventors: Johnson, Robert M.; Johnson, Ralph V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Linkage apparatus for connecting a use device preferably a vibrating cable plow, to a ground-engaging vehicle. The linkage apparatus includes a first arm member having a first mechanism for connecting the first end to the vehicle, a second arm member having a second mechanism for connecting the second end to the use device a third, mechanism for pivotally connecting the first and second arm members, and a mechanism for dampening vibrations between the first and second arm members preferably including resilient members such as air cushion bags.
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 April 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 2010.
- 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.