Skull clamp with load distribution indicators
CA 2443948 A1 · Owner: Ohio Medical Instrument Company, Inc. · Inventors: Lincoln, Donald A.; Day, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A three-pin skull clamp 10 includes a C-shaped frame 12 which partially encircles the head 18 of the patient, with a spring-loaded single skull pin assembly 22 located at one end of the frame 12 and adapted to engage the head 18 of the patient with a desired engagement force and two spaced skull , pins 30 mounted to a rocker arm 44 located at an opposite end of the frame 12. Each of the rocker arm skull pins 30 resides in operative contact with an indicator cap 66held by a spring-loaded pin ca rrier assembly 50 the , indicator cap 66 being movable relative to the rest of the pin carrier assembly 50in response to the engagement force applied to the corresponding skull pin 30 by 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
- Filed March 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2024.
- 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.