Invention Grant
US07640620B2 Retractable hose extension for a vacuum 有权
用于真空的伸缩软管延伸

  • Patent Title: Retractable hose extension for a vacuum
  • Patent Title (中): 用于真空的伸缩软管延伸
  • Application No.: US10843496
    Application Date: 2004-05-10
  • Publication No.: US07640620B2
    Publication Date: 2010-01-05
  • Inventor: John H. Stockton
  • Applicant: John H. Stockton
  • Agency: Fehr Law Firm
  • Agent Thompson E. Fehr
  • Main IPC: A47L5/38
  • IPC: A47L5/38
Retractable hose extension for a vacuum
Abstract:
A retractable hose extension for a vacuum having an expandable hose within a containment structure, a first coupling at the first end of the hose and in the first end of the containment structure for connecting the hose to a vacuum, a valve at the second end of the hose, and either a door or other releasable retention device for the hose. Preferably, the valve is an iris valve. Two fixed embodiment and one portable embodiment exist. The first fixed embodiment is inserted within a wall. The second fixed embodiment is rotatably attached to a tube contained within or running below a ceiling and extending from a vacuum system.
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