Sweeper type vacuum cleaner having automatic nozzle adjustment
United States Patent 2592710

Inventors:
Kirby, James B.
Publication Date:
04/15/1952
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Assignee:
Kirby, James B.
Primary Class:
15/319
Other Classes:
15/414, 15/375, 15/328, 15/389, 15/377
International Classes:
A47L5/32; A47L5/34; A47L5/36; A47L5/22
US Patent References:
2055734Suction cleaner
2289711Suction cleaner
2343227Suction cleaner
Foreign References:
GB564459A