Inflatable-deflatable pad and air control system therefor
CA 1070863 A · Owner: Allegiance Corporation · Inventors: Tringali, Richard C.; Zeman, Paul R.; Christoffel, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inflatable pad combined with an air control system for producing periodic inflation and deflation of that pad. The pad is elongated and has at least two separate passages extending from one end portion of the pad to the other, Such passages also having interlaced transverse portions extending in directions across the pad. Each passage has a pair of terminal openings one at each end of, the pad, for the flow of air under pressure such flow being, controlled by a valve which not only alternates in directing air to inflate one passage and then the other but, also alternates the direction of inflation so that each passage is inflated alternately from its opposite ends. In one embodiment, 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 January 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 1997.
- 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.