Percussive tool
CA 1265416 C · Owner: Spetsialnoe Konstruktorskoe Bjuro Gidroimpulsnoi Tekhniki Sibirskogo Otdelenia Akademii Nauk Sssr · Inventors: Ermilov, Nikolai P.; Korobkov, Vladlen V.; Fadeev, Petr Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A percussive tool comprising a housing accommodating a movable striker and connected with a power cylinder in which is arranged a striker shank with a gripping mechanism and a drive in the form of a hydraulic cylinder. The percussive tool is provided with a control unit having a spool valve means to control a distribution means. The spool valve means has a casing and a spool taking two positions in the casing and defining two chambers interconnected through a throttling means. One chamber constantly communicates with a discharge line, and the other chamber is periodically put in communication with the space of the hydraulic cylinder. The spool is spring-loaded with respect to the …
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 February 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2007.
- 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.