Multi-pole vacuum switch with a pole operating unit for each vacuum switching tube
CA 2120149 A1 · Owner: Schmidt, Detlev · Inventors: Gruner, Werner; Steinemer, Norbert; Binder, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multi-pole vacuum switch with a pole operating unit for each vacuum switching tube, A multi-pole vacuum switch (1) has for each, vacuum switching tube (10), a pole operating unit (5) with a lever arrangement for changing the direction of movement produced by a drive device (3). In a casing (16) of the pole operating unit (5), two toggle levers (21 22) are arranged, one (21) of which is connected to the operating plunger (12) of the vacuum switching tube (10) and the other of which is connected to a supporting lever (25) which acts on a contact pressure spring (32) via a pull rod (30). In the switched-on position the toggle, levers (21, 22) are close to dead centre. An adjustment device (40, …
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 September 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- 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.