US 12,305,547 B2
Sound attenuator as well as elements and a method of production thereof
Erin Komi, Espoo (FI); Jukka Tanttari, Espoo (FI); Antti Hynninen, Espoo (FI); and Seppo Uosukainen, Espoo (FI)
Assigned to Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
Appl. No. 17/426,195
Filed by Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
PCT Filed Jan. 29, 2020, PCT No. PCT/FI2020/050043
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/157382, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 20195054 (FI), filed on Jan. 29, 2019.
Prior Publication US 2022/0099006 A1, Mar. 31, 2022
Int. Cl. F01N 1/12 (2006.01); F01N 1/08 (2006.01)
CPC F01N 1/12 (2013.01) [F01N 1/086 (2013.01); F01N 2450/20 (2013.01); F01N 2490/16 (2013.01)] 19 Claims
OG exemplary drawing
 
15. A sound attenuator, comprising:
an enclosure, which comprises:
several spiral guides, which are configured to receive a plurality of components in a successively layered fashion so as to create at least one non-planar ruled surface for contacting a gaseous current,
a first set of mutually opposing guides comprising a first and second guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides, and
a second set of mutually opposing guides comprising a third and fourth guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides,
wherein the two sets of opposing guides are angularly offset from each other about a first axis, wherein the two sets of opposing guides are configured to receive cross-wise subassemblies of two components along a first axis, and
a sound attenuating element installed into the enclosure, which sound attenuating element is formed at least in part by an assembly of a plurality of components, which:
are successively connected to each other along the first axis,
each exhibit an elongated shape such that a dimension of elongation extends perpendicularly to the first axis,
are each bent along the axis of elongation to exhibit a curved shape, and which
form at least one non-planar ruled surface when assembled,
wherein every second component in the assembly extends in a non-straight angle, e.g. a right angle, in respect to the successive component.