Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1986-06-24
1988-12-20
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15347, 55374, 55377, A47L 526
Patent
active
047916990
ABSTRACT:
A hand vacuum cleaner is provided comprising a lightweight motor housing containing a revolving brush. A bag assembly is selectively separable from the housing and is sealable to the housing with an elastomeric retaining ring including a sealing and retaining bead for reception in a recessed slot area of a housing bag attachment collar. A fan is mounted to the motor on a motor shaft locking surface including a wall portion tapering towards the fan. The shaft is in locking cooperation with a mating fan bore locking surface including a wall portion tapered for close reception of the motor shaft locking surface. A shaft extension is threadedly received on the motor shaft and is urged into engagement against the fan by resistance of a revolving brush operated by a belt received on the shaft extension which continually tightens the shaft extension to the motor shaft and fixes the fan to the motor shaft. A stone shield is circumferentially spaced about the fan whereby the stone shield blocks items impinging against the housing from the fan from damaging the housing. The housing further includes an air deflector substantially received in the bag assembly having a terminal end portion disposed radially inwardly from the housing outer wall whereby the deflector directs the working air to facilitate greater storage of vacuumed dirt in the bag and prevent heavy objects received in the bag from rolling back into the housing and contacting the fan.
REFERENCES:
patent: 2016294 (1935-10-01), Replogle
patent: 2309583 (1943-01-01), Frantz
patent: 2395430 (1946-02-01), Sloan
patent: 4364757 (1982-12-01), Leonatti
Bramhall George H.
Smith Robert M.
Sovis John F.
Moore Chris K.
Royal Appliance Manufacturing Co.
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