Linear inpact ripper apparatus
CA 2072648 A1 · Owner: Caterpillar Inc. · Inventors: Jensen, Brian D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Impact rippers are useful for example, in fracturing rock and, other hard material which is to be excavated. Known systems using structures which mount the impact hammer and the linear ram within a single housing transmit vibrations into the mounting frame and are difficult to service and expensive to maintain. The subject linear impact ripper apparatus (10) has an impact hammer (20) having one end (102) resiliently mounted to a mounting frame (14) and another end (104) slidably mounted on one of the linear ram (18) and the tool holder (16). Thus, the disclosed linear impact ripper apparatus (10) reduces vibrations transmitted to the mounting frame (14) and has separate elements for ease …
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 January 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 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.