Devices for removing material from the free surface of a body of liquid
CA 1318606 C · Owner: Sheppard Ingot Casting Machines Limited · Inventors: Williams, Geoffrey Hugh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
8-, ABSTRACT OF THE DISCLOSURE, . A device for removing material from the free surface of a contained body of liquid comprises a scoop (6) supported from a fixed member (16) by two links (13,14) that carry a substantially horizontal arm (8) on which the scoop (6) is mounted so as to be rotatable about the axis of the arm (8). The connections (15,17,11,12) of the links (13,14) to the fixed member (16) and to the arm (8) are pivotal connections at the four corners of a quadrilateral. First actuating means (20) pivots the link (13) about its connection to the fixed member (16) thereby to move the arm (8) to and fro substantially in a horizontal plane. Second actuating means (10) rotates the …
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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 June 1, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 1, 2010.
- 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.