Apparatus and method for breaking sand free from a pattern pocket in a mold
CA 1201272 A · Owner: Deere & Company · Inventors: Truex, Douglas C.; Burlage, Cyril G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure This invention relates to an apparatus and a method for breaking sand free from a pattern having a deep bore. The apparatus is designed to support the pattern on a pattern plate having an aperture coaxially aligned to the deep bore. A stripper block is movably positioned within both the apertures and the bore and is spring biased to a stationary back plate which is supported to the pattern plate. As sand is packed about the pattern and into the bore, the stripper block is forced downward toward the back plate. After the sand is set forming a sand mold, the pattern is removed. Simultaneously the spring exerts a force on the stripper block causing it to move back to …
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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 March 4, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 4, 2003.
- 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.