Pipes and tubular conduits – Flexible – Corrugated
Reexamination Certificate
2005-12-15
2008-09-02
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
Flexible
Corrugated
C138S122000, C138S129000, C138S150000, C138S154000, C174S251000, C174S07000A, C174S047000
Reexamination Certificate
active
07418980
ABSTRACT:
The present invention relates to a vacuum cleaner hose manufactured by continuously spirally winding one row or two rows of band-shaped materials extruded with an electric wire inserted therein. The vacuum cleaner hose is formed by spirally winding and sticking a band-shaped material having protrusions connected to each other in a line. In one embodiment, the vacuum cleaner hose is formed from one row of the band-shaped material2having a plurality of the hollow protrusions4inserted with the electric wire5and at least one hollow protrusion4ainserted with no electric wire5is formed into the hose1.In another embodiment, the vacuum cleaner hose is formed from two rows of the band-shaped materials2in which the protrusions of only one row of the band-shaped materials2are inserted with the electric wire5.In still another embodiment, the hose1is formed from two rows of the band-shaped materials in which each of the two rows of the band-shaped materials2has the hollow protrusions4inserted with the electric wire5,and the hollow protrusions4ainserted with no electric wire5.Thus, the amount of use of the electric wire5in the hose1is reduced.
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Baker & Botts LLP
Brinson Patrick F
Kim Bong Hee
Kim Chanq Sik
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