Central vacuum cleaner having an energy recovery ventilator...

Details Central vacuum cleaner having an energy recovery ventilator... Central vacuum cleaner having an energy recovery ventilator...

2007-01-30

2007-01-30

Snider, Theresa T. (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

C015S301000, C015S327100, C015S347000, C055SDIG007

Reexamination Certificate

active

10726032

ABSTRACT:
A central vacuum assembly including a vacuum cleaning apparatus, a ventilation apparatus, a heat exchanger for transferring heat energy between air in the vacuum cleaning apparatus and air in the ventilation apparatus. Optionally, a fan for circulating air within the vacuum cleaning apparatus and/or the ventilation apparatus operates in a low speed mode for ventilation and a high speed mode for vacuuming.

REFERENCES:
patent: 1087228 (1914-02-01), Ferguson
patent: 1162151 (1915-11-01), Fitts et al.
patent: 1228931 (1917-06-01), Kirk
patent: 2431726 (1947-12-01), Bechtler
patent: 2725113 (1955-11-01), Fagyas
patent: 2979755 (1961-04-01), McCaskill
patent: 4967645 (1990-11-01), Mattson
patent: RE33810 (1992-02-01), Strieter
patent: 5257736 (1993-11-01), Roy
patent: 5924163 (1999-07-01), Burns, Jr.
patent: 6218798 (2001-04-01), Price et al.

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