Patent ID: 7815174
Filing Date: 2010-10-19
Classification: F16F

Abstract:
1. A vibration isolator, comprising: a first mounting member which is connected to one of a vibration generation portion and a vibration reception portion; a second mounting member which is connected to the other of the vibration generation portion and the vibration reception portion; an elastic element which is disposed between the first and second mounting members and can be elastically deformed; a main fluid chamber which has the elastic element as a portion of a partition wall and is filled with a fluid, and whose internal volume is changed due to deformation of the elastic element; a fluid sub-chamber which is filled with the fluid and in which at least a portion of a partition wall is deformably formed; an orifice which communicates between the main fluid chamber and the fluid sub-chamber; an opening and closing member which is disposed in a space including a portion of the orifice and causes the orifice to be opened and closed due to a reciprocating motion thereof; a check valve which is disposed between the main fluid chamber and the opening and closing member, and allows the fluid to flow from the main fluid chamber only toward the opening and closing member; and an elastic member which biases the opening and closing member toward the check valve; wherein the check valve is comprises of a valve body and a valve seat; the valve body is made of an elastic material, a surface disposed in opposition to the main fluid chamber being made concave; and the valve body is disposed under a preload applied toward the main fluid chamber side such that the surface of the valve body which is disposed in opposition to the main fluid chamber is pressed against the valve seat.