Hydraulic damping device

A hydraulic damping device comprising:

• a pair of supporting members;
• a rubber block disposed between said supporting members, said rubber block having a concave surface;
• a rubber sheet which is operatively coupled to said rubber block so as to define a liquid chamber between said concave surface of said rubber block and said rubber sheet;
• a partition means for dividing said liquid chamber into a main liquid chamber and an auxiliary liquid chamber, said partition means having an inclined inner peripheral wall surface extending between flat end faces which defines an opening at a central portion of said partition means, whereby a diameter of said opening of said partition means decreases from a maximum at one of said end faces of said partition means which faces said main liquid chamber to a minimum diameter spaced from said one said end faces, at least a portion of said inclined inner peripheral wall surface of said partition means including a flat surface being defined in a plane which is substantially parallel to an end face of said partition means;
• an elastic rubber wall element for closing said opening of said partition, said elastic rubber wall element having a flat surface facing said main liquid chamber, and a concavely curved surface facing said auxiliary liquid chamber whereby a thickness of said elastic rubber wall element gradually decreases from an outer peripheral portion thereof towards a central portion thereof, an inclined outer peripheral wall surface of said elastic rubber wall element contacting said inclined inner peripheral wall surface of said partition means along substantially the entire length of said inclined inner peripheral wall surface of said partition means;
• and
• a throttle passage defined in said partition means for fluidly coupling said main liquid chamber and said auxiliary liquid chamber.