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Expired Canadian patentCanada

Spring retainer for vacuum cleaner nozzle brush

CA 1264510 C · Owner: Berfield, Robert C. · Inventors: Berfield, Robert C.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A nozzle for a vacuum suction cleaner has a suction inlet on its bottom surface, and behind the inlet the nozzle has a brush receiving chamber. The brush comprises a support bar in the brush chamber and the support bar supports depending bristles. A respective spring at both lateral ends of the brush chamber presses against the bristle support bar and urges the brush out of the housing. A respective spring supporting retainer which is integral with each spring is clipped to each of two projections at the lateral ends of the brush chamber and that spring supporting retainer is removable from its projection to facilitate removal of the brush from the brush chamber.

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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 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 30, 1986
GrantedJanuary 23, 1990
Term endedJanuary 23, 2007
Patent numberCA 1264510 C
Classification (IPC)A47L9/06

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedJan 30, 1986Patent grantedJan 23, 1990Term endedJan 23, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.