Patent ID: 7980537
Filing Date: 2011-07-19
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 is capable of being 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 a fluid and in which at least a portion of a partition wall is deformably formed, and; 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 opening and closing member only toward the main fluid chamber; and an elastic member which biases the opening and closing member in a direction away from the check valve; wherein said check valve is comprised of a valve body and a valve seat; the valve body constituting the check valve is made of an elastic material; and in a portion of the opening and closing member which is disposed in opposition to the valve body, there is provided a abutting portion which can be abutted against the valve body when brought close to the valve body.