US 12,305,342 B2
Noise reducing resonator in a surface compaction machine
Hongan Xu, Mechanicsburg, PA (US); and David Clark, Mechanicsburg, PA (US)
Assigned to Volvo Construction Equipment AB, Eskilstuna (SE)
Appl. No. 17/770,496
Filed by Volvo Construction Equipment AB, Eskilstuna (SE)
PCT Filed Oct. 22, 2019, PCT No. PCT/IB2019/059028
§ 371(c)(1), (2) Date Apr. 20, 2022,
PCT Pub. No. WO2021/079169, PCT Pub. Date Apr. 29, 2021.
Prior Publication US 2022/0372714 A1, Nov. 24, 2022
Int. Cl. E01C 19/28 (2006.01); F01N 1/02 (2006.01)
CPC E01C 19/286 (2013.01) [F01N 1/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A resonator assembly for a surface compaction machine comprising:
a resonator housing defining an internal cavity, the resonator housing comprising a first head plate comprising a plurality of first cutouts and a second head plat opposite the first head plat, the second head plate comprising a plurality of second cutouts; and
a plurality of first extension tubes, each first extension tube of the plurality of first extension tubes coupled to the first head plate around a corresponding first cutout,
each first cutout forming an acoustic passage between the internal cavity and an exterior of the resonator housing to attenuate sound around the internal cavity;
a drum housing comprising a substantially cylindrical compaction surface surrounding the first head plate and the second head plate, the internal cavity comprising a substantially cylindrical cavity defined by the first head plate, the second head plate, and the drum housing; and
an eccentric vibration system housing for enclosing an eccentric vibration system, the internal cavity surrounding the eccentric vibration system.