US 12,492,715 B2
Debris blower with sound attenuation resonator
Benjamin L. Waldera, Woodbury, MN (US); Samuel M. Mahaffey, Belle Plaine, MN (US); and David W. Johnson, Hastings, MN (US)
Assigned to THE TORO COMPANY, Bloomington, MN (US)
Filed by THE TORO COMPANY, Bloomington, MN (US)
Filed on Jun. 9, 2025, as Appl. No. 19/231,751.
Application 19/231,751 is a continuation of application No. 18/679,752, filed on May 31, 2024, granted, now 12,345,278.
Claims priority of provisional application 63/609,163, filed on Dec. 12, 2023.
Claims priority of provisional application 63/470,587, filed on Jun. 2, 2023.
Prior Publication US 2025/0297620 A1, Sep. 25, 2025
Int. Cl. F04D 29/66 (2006.01); A01G 20/47 (2018.01); F04D 19/00 (2006.01); F04D 29/52 (2006.01)
CPC F04D 29/665 (2013.01) [A01G 20/47 (2018.02); F04D 19/002 (2013.01); F04D 29/522 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A debris blower, comprising:
an axially-arranged fan and motor together configured to generate an airflow from an inlet end to an outlet end of the debris blower, the airflow defining an airflow axis and a cross-sectional plane normal to the airflow axis;
a motor enclosure configured to both secure the motor to a housing of the debris blower and provide an airflow path around the motor; and
a resonant chamber proximate an airflow entrance end of the motor enclosure, the resonant chamber partially surrounding the motor enclosure, wherein the resonant chamber comprises first and second sections encompassing corresponding first and second volumes of different sizes, the different sizes selected to form an acoustic resonator configured to attenuate noise generated by the debris blower.