Matt D Ledbetter

US Patent:

20130161884, Jun 27, 2013

Filed:

Dec 26, 2011

Appl. No.:

13/337222

Inventors:

Maurice D. Griffin - Euless TX, US
Scott Hemmen - Hurst TX, US
Matt Ledbetter - Arlington TX, US

Assignee:

BELL HELICOPTER TEXTRON INC. - FORT WORTH TX

International Classification:

F16F 13/08

US Classification:

26714013

Abstract:

A vibration isolator includes an upper housing and a lower housing; an upper reservoir housing defining a upper fluid chamber; a lower reservoir housing defining a lower fluid chamber; a piston spindle resiliently coupled to the upper housing with an upper elastomer member, the piston spindle being resiliently coupled to the lower housing with a lower elastomer member; an inertia track having a tuning passage, the inertia track being removably coupled to the piston spindle; and a tuning fluid disposed within the upper fluid chamber, the lower fluid chamber, and the tuning passage. The vibration isolator cancels vibratory forces at an isolation frequency, the isolation frequency being at least partially dependent upon a size of the tuning passage.