Retractable hose extension for a vacuum

Details Retractable hose extension for a vacuum Retractable hose extension for a vacuum

2007-12-11

2007-12-11

Brinson, Patrick F. (Department: 3754)

Pipes and tubular conduits

Flexible

With means for facilitating collapse

C138S118000, C138S110000, C015S315000, C015S314000, C137S335000, C137S335000, C137S360000

Reexamination Certificate

active

10843497

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.

REFERENCES:
patent: 971518 (1910-10-01), Bergens
patent: 1255175 (1918-02-01), Kellogg
patent: 2332940 (1943-10-01), Senke
patent: 2914789 (1959-12-01), Scanlan et al.
patent: 2953806 (1960-09-01), Walker
patent: 3050767 (1962-08-01), Rankin
patent: 3520725 (1970-07-01), Hamrick
patent: 5526842 (1996-06-01), Christensen
patent: 5904183 (1999-05-01), Leech
patent: 6120615 (2000-09-01), Fletcher

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