Mining unit of coal combines
CA 1102828 A · Owner: Centralny Osrodek Projektowo-Konstrukcyjny Maszyn Gorniczych "Komag" · Inventors: Blazewicz, Andrzej; Szymczyk, Boleslaw; Jaromin, Zygmunt
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention refers to a cutter unit for a coal mining machine. Known mining units have a cylindrical profile defined by a cap plate and panels helically wound on a base cylinder. The outer edges of the plate and the panels are provided with cutter holders. The unit disclosed in this application has helical panels and a cap plate mounted on a cylinder. The outer periphery of each panel projects beyond the rear end plane of the cylinder. The cylinder overlaps with the body a part of the drive head for the cutter unit. The element that mounts the unit on its drive shaft is situated inside the cylinder so that it partly overlaps the axial extent of the cap plate. Due to this design the, rear …
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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
- 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.