Nozzle with improved coupling for a vacuum device
CA 1293346 C · Owner: Berfield, Robert C. · Inventors: Berfield, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For attaching a rigid coupling to a nozzle for relative rotational freedom between them and for reducing the noise level at the connection between them, the coupling has a generally cylindrical arm to be received in a cylindrical opening into the nozzle. The arm of the coupling has a nonmetallic plastic, sleeve placed thereover, which is preferably in the form of two half cylinders. Grooves in the nonmetallic sleeve reduce the area of frictional contact between the sleeve and the nozzle. The nonmetallic sleeve has tabs at one end for passing through a gap in a ring in the nozzle to connect the coupling and the nozzle while permitting relative rotation.
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 December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 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
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.