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US 4,231,133 AGranted
Wet vacuum machine
AssigneeDeep Steam Extraction (1974) Ltd.
InventorMiroslav Probost
Life of this patent
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AssigneeDeep Steam Extraction (1974) Ltd.
InventorMiroslav Probost
Estimating the term…
A suction power unit for a wet vacuum machine includes a dome-shaped housing closed off by a bottom wall with an inlet defined in the bottom wall and a centrifugal blower aligned with the inlet. A second wall is parallel to the bottom wall and spaced therefrom defining an exhaust chamber about the centrifugal blower and hermetically separating the motor on the centrifugal blower from the exhaust chamber. An inlet opening in the second wall and a third wall spaced from the second wall and parallel thereto define a chamber, and a second centrifugal blower is provided in the so-formed chamber between the second and third walls with the motor beyond the third wall hermetically sealed from the chamber formed between the second and third walls. Exhaust ports communicate the chamber with the atmosphere such that an unimpeded flow is provided from the inlet and the bottom wall through the first centrifugal blower through the inlet in the second wall through the second centrifugal blower through the exit exhaust ports, and the air flow is completely isolated from the motors of the two centrifugal blowers.
A suction power unit for use with a wet vacuum machine comprising a housing, a first electric motor-centrifugal fan arrangement provided in the housing, the first centrifugal fan having an axis of rotation, inlet means communicating axially with the fan, an exhaust chamber defined radially of the centrifugal fan, means hermetically isolating the motor of said first centrifugal fan from said exhaust chamber, the exhaust chamber being defined by walls of the housing including a top wall in a plane at right angles to the axis of the first centrifugal fan, an inlet aperture defined in the top wall of the exhaust chamber, a second centrifugal fan arranged in said housing having an axis of rotation parallel to but spaced from the axis of rotation of the first centrifugal fan, the inlet aperture communicating axially with the second centrifugal fan, a second exhaust chamber formed radially of the second centrifugal fan, and means hermetically isolating the motor of the second centrifugal fan from the second exhaust chamber, and exhaust ports communicating said second chamber with the atmosphere.
A wet vacuum apparatus including a housing, a suction system within said housing, the housing including a first closed wall and a second partition wall spaced from the first wall inwardly of the housing and parallel to the first wall, a third partition wall perpendicular to the second wall, and a fourth partition wall spaced from the second wall inwardly of the housing and parallel to the second wall and forming a closed chamber with said second and third walls and the wall of the housing, the first wall defining an air inlet, a first centrifugal blower unit having a first centrifugal blowing fan mounted to the second wall such that the blower fan is between the first and second walls with the air inlet aligned with the axis of rotation of the fan and with the electric motor of said centrifugal blower located on the opposite side of said second wall to the first wall such that the motor is isolated from the air passage formed between the first and second walls, an air inlet opening formed in said second wall spaced from the first centrifugal blower unit, a second centrifugal blower unit having a second centrifugal blower fan mounted to the fourth wall such that the second blower fan is located in said chamber between the second and fourth walls, and the axis of rotation is aligned with the inlet opening in the second wall, the motor of the second centrifugal blower unit located on the opposite side of the fourth wall from the second wall such that it is hermetically isolated from the air passage formed between the first and second walls and exhaust ports provided in the housing wall communicating the chamber between the second and fourth walls with the atmosphere.
Dependencies are inferred from the claim text.