Patent ID: 7048264
Filing Date: 2006-05-23
Classification: F16F

Abstract:
1. A liquid-filled engine mount comprising: an engine mounting member to be mounted to an engine; a body mounting member to be mounted to a vehicle body; a rubbery elastic member interposed between said engine mounting member and said body mounting member; a diaphragm mounted to at least one of said engine mounting member and said body mounting member in opposed relation to said rubbery elastic member, said diaphragm defining a liquid chamber in cooperation with said engine mounting member, said body mounting member, and said rubbery elastic member, said liquid chamber containing an actuating liquid therein; a partition wall disposed within said liquid chamber to separate said liquid chamber into a primary chamber and a secondary chamber, said partition wall having first and second orifices formed to extend therethrough, said first orifice communicating with said primary chamber and said secondary chamber, said second orifice communicating with said primary chamber; a resilient means for urging said diaphragm into contact with said partition wall such that said second orifice does not communicate with said secondary chamber; said diaphragm, by moving against said resilient means, allowing said second orifice to come into communication with said secondary chamber; said first orifice and said second orifice providing resistances to said actuating liquid flowing therethrough, the resistance provided by said first orifice being different from the resistance provided by said second orifice; and said diaphragm and said partition wall having surfaces contacting each other, said surface of said diaphragm having plural projections and a seal portion formed thereon, the plural projections and seal portion facing said surface of said partition wall, said seal portion configured to seal around an opening of said second orifice, said plural projections being formed on said diaphragm so that they are disposed within a perimeter defined by said seal portion and being disposed outside the perimeter of said seal portion, and said plural projections being configured to reduce generation of noise when the diaphragm is urged into contact with the partition wall.