US 12,270,172 B2
Apparatus and a method for noise attenuation in an impact pile driving device
Petri Turunen, Kuopio (FI); and Markku Koffert, Kuopio (FI)
Assigned to Junttan Oy, Kuopio (FI)
Appl. No. 17/601,590
Filed by Junttan Oy, Kuopio (FI)
PCT Filed Apr. 5, 2019, PCT No. PCT/FI2019/050277
§ 371(c)(1), (2) Date Oct. 5, 2021,
PCT Pub. No. WO2020/201612, PCT Pub. Date Oct. 8, 2020.
Prior Publication US 2022/0170227 A1, Jun. 2, 2022
Int. Cl. E02D 13/00 (2006.01); E02D 5/04 (2006.01); E02D 5/28 (2006.01); E02D 7/10 (2006.01); E02D 13/04 (2006.01)
CPC E02D 13/005 (2013.01) [E02D 5/04 (2013.01); E02D 5/285 (2013.01); E02D 7/10 (2013.01); E02D 13/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An apparatus for noise attenuation in an impact pile driving device of metal sheet or concrete piles wherein the apparatus comprises a pile guide being attachable to the lower end of a hammer with a moving ram block of an impact pile driving device and a drive cap, wherein the apparatus comprises a compressing arrangement in connection with the pile guide having at least one compressing element and mechanical, hydraulic or pneumatic compressing means for compressing a pile fitted in to the pile guide transversally by means the at least one compressing element such that the pile is centralized in the middle of the drive cap, and that the central axis of the pile and the central axis of the moving ram block of the hammer coincide.