Hydraulically driven striking device
CA 1047883 A · Owner: Linden-Alimak Ab · Inventors: Juvonen, Vaino E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydraulically driven striking device The present invention relates to a hydraulically driven striking device,comprising, - a frame, - a striking piston striking against a tool and moving in the stroke and return direction in the frame - a high pressure circuit and a low pressure circuit formed in the frame, - a first cylinder space surrounding the striking piston and continuously communicating with the high pressure circuit - a second cylinder space surrounding the striking piston and alternately communicating with the high pressure and low pressure circuit, and, - a sleeve shaped control valve positioned in the latter cylinder space and surrounding the piston said control valve being, …
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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 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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.