Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1999-03-16
2000-08-22
Snider, Theresa T.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15420, 15421, A47L 902
Patent
active
061052078
ABSTRACT:
A vacuum nozzle adapted for use on a working surface has a generally rectangular main body portion with a top surface, a bottom surface, an outer periphery, and a central aperture through the main body portion for connection to a vacuum hose connected to a vacuum source. The main body portion may be slightly concave or flat. Spacers on the bottom surface support the main body portion above a surface to be cleaned at a predetermined height. The size and shape of the bottom surface, and its height above the surface to be cleaned are designed to draw air between the surface to be cleaned and the bottom surface of the nozzle at a substantially uniform velocity which is proportional to the inflow velocity of the vacuum hose connected with the nozzle, and to maintain little or no difference in static pressure between the air under the nozzle and the static pressure of the air above the nozzle.
REFERENCES:
patent: 3550183 (1970-12-01), Wolf
patent: 3678534 (1972-07-01), Hilbig
patent: 4701975 (1987-10-01), Hampton et al.
patent: 4989294 (1991-02-01), Fischer
patent: 5063635 (1991-11-01), Ishii et al.
patent: 5347679 (1994-09-01), Saunders et al.
patent: 5497532 (1996-03-01), Glatz
patent: 5987700 (1999-11-01), Edlund
Roddy Kenneth A.
Snider Theresa T.
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