Inventors:
Kenneth Seymour - Villa Park IL, US
Sidi Sadfa - Chicago IL, US
Ning Lei - Oak Brook IL, US
James Yager - St. Charles IL, US
Xilin Yang - Streamwood IL, US
Kalyan Bagga - Northville MI, US
W. Snyder - Hanover Park IL, US
International Classification:
F16L055/04
Abstract:
A mechanical oscillator for attenuating pressure waves formed in a rail having a volume of fluid therein includes a rigid enclosed fluid cavity having a selected volume, the volume communicating with the rail actuating fluid though an orifice having a select volume for containing actuating fluid, the orifice having an aperture in fluid communication with the actuating fluid selected such that when an pressure wave impinges on the aperture of the orifice, the motion of the actuating fluid in the volume of the orifice is set to vibrating, the vibrating acting to excite the actuating fluid within the enclosed volume, a resulting amplified motion of the actuating fluid in the orifice, due to phase cancellation between the actuating fluid in the volume of the orifice and the actuating fluid volume in the enclosed cavity, causing energy absorption of the pressure wave due to frictional drag in and around the orifice. An pressure wave attenuator and a method of attenuation are also included.