Method and apparatus for mixing asphalt compositions
CA 1280108 C · Owner: Standard Havens Products, Inc. · Inventors: Heap, Ronald E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drum mixer asphalt plant 10 is provided with a rotatable cylinder 34 having an internal passageway 114 where the aggregates and asphalt are mixed to produce an asphaltic composition. In a first zone 35 36, 38 within, the mixer 12, aggregates are heated and dried by heat radiation and the stream of hot gases produced by a burner 44 flame. In a second zone 40 within the mixer 12 liquid, asphalt 124 is mixed with the aggregates. An exhaust tube 108, 110, 112 is disposed within the passageway 114 and extends from the output end 50 of the drum mixer 12 into the first zone 38 to remove the hot gases to prevent degradation of the asphalt. Thus, the second zone 40 116, wherein the liquid asphalt …
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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 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 2008.
- 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
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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.