Rotational grapple
CA 1234591 A · Owner: Timberjack Inc. · Inventors: Johnson, Thomas E.; Spencer, Terrance D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Relates to a rotation bearing for a grapple which is interposed between the main stationary and rotational parts of the grapple which permits the motor for rotating the grapple to be located internally of an elongated housing and permits the hydraulic swivel for actuating the grapple to be formed as an integral part of the structure in a manner such that the swivel is not effected by loads being transmitted through the rotational bearing.
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 March 29, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 29, 2005.
- 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.