Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1996-07-26
1998-08-25
Till, Terrence
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15320, 153402, 165 47, A47L 1100, A47L 1300
Patent
active
057971633
ABSTRACT:
An extraction machine of this invention comprises a main housing. A vacuum pump in the main housing operates to create a vacuum to extract liquid from the surface. A motor in the main housing drives the vacuum pump, the vacuum pump having an exhaust. An exhaust duct conducts exhaust air from the exhaust of the vacuum pump to an opening in the main housing for exhaust to the environment. A constriction in the exhaust duct reduces the pressure of exhaust air flowing through the exhaust duct from a first pressure upstream from the constriction to a second lower pressure in a low pressure zone adjacent the constriction. A compartment has an inlet for entry of ambient air into the compartment and an outlet for exit of air from the compartment. A second motor is located within the compartment. A cooling duct has an inlet communicating with the outlet of the compartment and an outlet communicating with the low pressure zone in the exhaust duct. The second lower pressure of the exhaust air in the low pressure zone is less than ambient pressure thereby to cause a flow of cooling ambient air into the compartment, through the compartment and into the cooling duct, and then into the exhaust duct for exhaust out of the main housing.
REFERENCES:
patent: 2898621 (1959-08-01), Vance
patent: 3454978 (1969-07-01), Kuwahara
patent: 3854164 (1974-12-01), Schmitz
patent: 3962746 (1976-06-01), Johnson et al.
patent: 4361928 (1982-12-01), Schulz
patent: 4454627 (1984-06-01), Simm et al.
Clarke Sales Brochure "Clarke.RTM. Family Of . . . Self Contained Extractors", published Aug. 1993.
Deiterman Lenard Keith
Kramer Michael Gerald
Whitaker Emert Robert
Clarke Industries, Inc.
Till Terrence
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