Thomas J. Beckey - Edina MN Rodney D. Lund - Blaine MN Steve R. Porter - Burnsville MN Chadwick A. Shaffer - Oakdale MN Steven J. Svoboda - Bloomington MN
Assignee:
The Toro Company - Bloomington MN
International Classification:
A47L 704
US Classification:
15326
Abstract:
The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the housing outlet and blower tube. The noise reduction is achieved by placing sound absorbing material in the blower tube. The sound absorbing material may include flared upstream and downstream ends to reduce turbulence. The sound absorbing material may be held within the blower tube by an insert frame such that substantial portions of the sound absorbing material are exposed to air passing through the blower tube. Also disclosed is a sound absorbing insert that can be placed within an existing blower tube to retrofit portable blowers with noise reduction technology.
Thomas J. Beckey - Edina MN Rodney D. Lund - Blaine MN Steve R. Porter - Burnsville MN Chadwick A. Shaffer - Oakdale MN Steven J. Svoboda - Bloomington MN
Assignee:
The Toro Company - Bloomington MN
International Classification:
F01N 700 F04D 2966
US Classification:
15326
Abstract:
The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the housing outlet and blower tube. The noise reduction is achieved by placing sound absorbing material in the blower tube. The sound absorbing material may include flared upstream and downstream ends to reduce turbulence. The sound absorbing material may be held within the blower tube by an insert frame such that substantial portions of the sound absorbing material are exposed to air passing through the blower tube. Also disclosed is a sound absorbing insert that can be placed within an existing blower tube to retrofit portable blowers with noise reduction technology.
Thomas J. Beckey - Edina MN Steven R. Porter - Burnsville MN Rodney D. Lund - Blaine MN Chadwick A. Shaffer - Oakdale MN Steven J. Svoboda - Bloomington MN Steven T. O'Brien - Brooklyn Park MN
Assignee:
The Toro Company - Bloomington MN
International Classification:
A47L 900
US Classification:
15326
Abstract:
The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the inlet of the blower housing. The noise reduction is achieved in one respect by placing sound absorbing material in a plenum attached to the inlet opening of the blower housing. Other features of the preferred plenum include louvered openings and angled engagement members to draw the plenum tightly against the blower housing.
