Hot water vacuum extraction machine with reverse fan cooled vacu

Brushing – scrubbing – and general cleaning – Machines – With air blast or suction

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15413, A47L 700

Patent

active

042888859

ABSTRACT:
A vacuum pump assembly, axially mounted within a hot water vacuum extraction machine enclosed housing, includes an enclosed cylindrical casing. A vertical axis shaft mounted fan at the lower end of the vacuum pump assembly casing rotates within an annular shroud bearing radial ports and which closely surrounds the fan blading with minimal air gap between the tips of the fan blades and the shroud annular sidewall to improve cooling air flow through the fan and over the pump assembly motor coils and reducing the hot water vacuum extraction machine housing interior temperature and that within the vacuum pump assembly. By cooling air flow discharge from the bottom of the extraction machine housing, water entry to the vacuum pump assembly interior is prevented.

REFERENCES:
patent: 3821830 (1974-07-01), Sundheim
patent: 3831223 (1974-08-01), Colt et al.
patent: 3848290 (1974-11-01), Bates
patent: 3896521 (1975-07-01), Parise
patent: 4019218 (1977-04-01), Cyphert
patent: 4068340 (1978-01-01), Forward

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