Vacuum cleaner

Details Vacuum cleaner Vacuum cleaner

1978-01-05

1980-04-01

Croyle, Carlton R.

Pumps

Successive stages

Stages driven by relatively movable motor working members

15412, 417423A, 417312, F04B 3900, F04D 2516, F04D 2966

Patent

active

041959698

ABSTRACT:
A vacuum cleaning apparatus is disclosed having a suction head adapted for use on a collection tank. The suction head includes a base, at least one blower-motor unit mounted on the base and having a suction intake and an exhaust outlet. The exhaust outlet of the unit is connected to a baffled sound chamber within which a plurality of sound absorbing elements are positioned. Another blower-motor unit may be mounted on the base with the units interconnected in series. A cover carried by the base encloses the blower-motor unit or units and also defines a baffled cooling air intake passage for each blower-motor unit. The suction inlet is connected to an intake aperture through a transfer chamber.

REFERENCES:
patent: 1418238 (1922-05-01), Cramer
patent: 2125850 (1938-08-01), Norris
patent: 2281858 (1942-05-01), Pierce
patent: 2719596 (1955-10-01), Kent et al.
patent: 2731194 (1956-01-01), Kent
patent: 3101889 (1963-08-01), Tatge
patent: 3220638 (1965-11-01), Petersen
patent: 3906584 (1975-09-01), Hult

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