发明名称 |
Variable frequency sound attenuator for rotating devices |
摘要 |
A rotatable sound attenuation device is provided comprising a central portion rotatable about a first axis, a radial portion extending outwardly from the central portion and a chamber having a closed first end and a second end opening radially outwardly of the radial portion and defining a second axis therein having a radial component thereto. A piston is disposed within the chamber and is moveable to a location along the second axis in response to a centrifugal force imparted on the piston by rotation of the central portion and the radial portion about the first axis. A biasing member operates to limit movement of the piston along the second axis. A quarter wave chamber is defined by the second, open end of the chamber and the piston and has a sound attenuating length defined by the location of the piston along the second axis of the chamber.
|
申请公布号 |
US7708113(B1) |
申请公布日期 |
2010.05.04 |
申请号 |
US20090430352 |
申请日期 |
2009.04.27 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
PRIOR GREGORY P. |
分类号 |
F02M35/00;F01C1/16;F01C1/18;F01C21/00;F01N1/02;F02B27/02;F02B33/00;F02M35/10 |
主分类号 |
F02M35/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|