Rotational grapple
CA 1070357 A · Owner: Cullings, Harold L. · Inventors: Cullings, Harold L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotational grapple adapted for attachment to the boom of a construction machine possesses both lifting and downward pressure capabilities through a unique thrust bearing arrangement. A rotational sleeve component capable of carrying grapple jaws or a lifting magnet is swiveled to a relatively stationary shaft structure which is suspended from a crane boom or the like through a universal pivot. In one form a drive flange on the rotational sleeve component is engaged frictionally by a hydraulically powered motor wheel which is suspended floatingly on the nonrotatable shaft structure and urged into engagement with said drive flange by adjustable tension spring means. Grapple jaw operating …
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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
- Granted January 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 1997.
- 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.