Sea - or drag-anchor
CA 1308967 C · Owner: Pullar, Ian S. · Inventors: Pullar, Ian S.; Smith, Francis John; Abernethy, William John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: "SEA - OR DRAG-ANCHOR", ABSTRACT A sea anchor or drogue has a body including a front section (11) tapering forwardly to a nose with means (25) for attaching a hawser (26) by which the device may be towed by a vessel, and a rear section (12) tapered or diminished towards the rear and hollowed or concaved from the front, the front section of the body being formed with longitudinal channels (22) leading into the hollowed back section (12). When towed water, driven through the channels (22) into the back section (12) is ejected outwardly and forwardly from the periphery of the back section, imparting considerable drag. For stability, the back section (12) has small relief ports (24) and …
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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
- 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.