Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1997-11-14
1999-12-21
Warden, Sr., Robert J.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
153272, A47L 1100
Patent
active
060032006
ABSTRACT:
Vacuum cleaning apparatus, particularly adapted for wet/dry cleaning operations includes a powerhead housing assembly formed by an impeller housing for supporting an electric motor which drives a working air impeller and a motor cooling air fan and a cover member removably secured to the impeller housing. The impeller housing and the cover member define flow passages and chambers for diffusing and expanding working air flow to reduce noise emissions therefrom and for directing motor cooling air through the housing assembly without mixing with working air flow and while minimizing the ingestion of working air into the motor cooling air flowpath. An alternate embodiment of the housing assembly includes separable, opposed impeller housing members and a shroud member, all secured together by common fasteners and cooperating to form the working air diffusing and expansion chambers together with the cooling air flow passages. Inlet and discharge ports in the air positioned to provide for minimizing ingestion of exhausted working air into cooling air intake ports.
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Finley David B.
Kitska Jerome G.
Potts Aaron J.
Olsen Kaj K.
Overhead Door Corporation
Warden, Sr. Robert J.
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