Central vacuum cleaner muffler

Details Central vacuum cleaner muffler Central vacuum cleaner muffler

1995-10-20

2000-04-25

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

55276, A47L 900

Patent

active

06052863&

ABSTRACT:
A central vacuum cleaner having an air flow exhaust pipe is provided with a muffler comprising an elongated muffler pipe having a reduced diameter inlet and a reduced diameter outlet and a noise reducing foam liner disposed in the muffler pipe between the inlet and outlet. The foam liner includes a smooth inner surface that is generally flush with inner surfaces of the inlet and outlet. The foam liner comprises a combustion modified polyether polyurethane foam tube inserted in the muffler pipe between the inlet and outlet.

REFERENCES:
patent: 3882961 (1975-05-01), Cannan et al.
patent: 4015683 (1977-04-01), Williams
patent: 4241720 (1980-12-01), Kitchen
patent: 4435877 (1984-03-01), Berfield
patent: 4662910 (1987-05-01), Lieb
patent: 4718924 (1988-01-01), DeMarco
patent: 4759422 (1988-07-01), Belley
patent: 4786299 (1988-11-01), DeMarco
patent: 5400463 (1995-03-01), Attard et al.
patent: 5471707 (1995-12-01), Kang

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