Patent ID: 7325570

Claim:
An energy attenuation apparatus for a system conveying liquid under pressure, wherein said apparatus is disposed in a liquid conveying structure of said system, said apparatus comprising the following components: (a) first and second outer expansible hose conduits, each of which respectively defines an associated first and second tuning chamber having an inlet end and an outlet end, (b) a generally non-expansible tubular conduit directly interconnecting said two hose conduits, wherein said chambers communicate with one another via said tubular conduit, (c) a first tuning tube of polymeric material disposed in said first chamber and having a first end connected to said inlet end of said first chamber for receiving liquid therein and having a second open end that is spaced from said outlet end of said first chamber for emptying liquid into said first chamber, said first tuning tube being the only tuning tube disposed in said first chamber, and (d) a second tuning tube of polymeric material disposed in said second chamber and having a first end connected to said outlet of said second chamber for conveying liquid thereto and a second open end that is spaced from said inlet end of said second chamber for receiving liquid conveyed to said second chamber via said tubular conduit, said second tuning tube being the only tuning tube disposed in said second chamber.