Hydraulically actuated tool for mechanically splitting rock-like material
CA 1096370 A · Owner: Langfield, Edward R. · Inventors: Hile, James L.; Langfield, Edward R.; Hird, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rock splitting apparatus including a retaining housing having an upper and a lower portion and having means for securing at its upper closed end including a hydraulic cylinder having a piston and a piston rod extending from and through a lower closing end of the cylinder. Means is provided for removably connecting the extending rod end of the hydraulic piston to the closed end of the pneumatic cylinder. A retaining housing is disposed to carry the pneumatic cylinder movable in a lower portion of this housing as and when the pneumatic cylinder is advanced and retracted by the hydraulic cylinder. Cooperative guide means is formed on an exterior portion of the pneumatic cylinder housing and a …
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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 February 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 24, 1998.
- 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.