Vibration isolation insert for aircraft floor planels and the like

An insert securing an aircraft floor panel to a support structure wherein vibrations transmitted by said support structure are isolated from said floor panel, said insert comprising

• a) a substantially cylindrical rigid outer member secured in an aperture in said aircraft floor panel and having an axial throughbore defining a minimum internal dimension of said outer member;
• b) a contoured elastomeric member bonded to said axial throughbore, said elastomeric member having a central axial opening therethrough and an elastomer portion surrounding said central axial opening that extends below a lowermost portion of said outer member, said elastomer portion being positioned proximate to but in nonengaging relationship with said support structure and being deflectable into snubbing engagement with said support structure upon application of sufficient vertical load;
• and
• c) a rigid one-piece inner member having a substantially cylindrical first portion of a first diameter which is press fit into said central axial opening of said elastomeric bushing and an integral shorter second portion which has a second larger diameter than said first portion, wherein said second larger diameter of said integral shorter second portion exceeds said minimum internal dimension of said outer member to safety the insert against potential loss of elastomer integrity, said integral second portion generally overlying said contoured elastomeric member, said rigid inner member having an axial fastener-receiving throughbore permitting attachment to said support structure.