NOISE REDUCED AIR BLOWER ASSEMBLY FOR VACUUM CLEANERS

摘要

An improved blower assembly particularly useful for liquid bath type vacuum cleaners is disclosed. The improved blower assembly features enhanced noise attenuation achieved by providing a four-stage noise reduction system featuring a serpentine airflow path at the blower assembly air inlet and outlet. The four stages of the noise reduction system are comprised of; a noise reduction stage housing, a lower stage assembly, an upper stage assembly, and a motor base, respectively. Improvements in the production assembly techniques of the blower assembly components are further provided through a modified upper stage assembly which is assembled to a motor base component by a partial turn and lock procedure so that the components become firmly locked together and accurately positioned. This production technique can be accomplished quickly without a requirement of a high degree of operator skill.