Patent ID: 6698930
Filing Date: 2004-03-02
Classification: F16C

Abstract:
A foil gas bearing comprising:a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacement of said rotary shaft, which is provided between said rotary shaft and said rotary shaft retainer; wherein said rotary shaft retainer comprises plural recesses of which the cross section is quadrangular; said back spring comprises plural recesses that enter inside of said recesses of said rotary shaft retainer, connection portions between said recesses, and peripheral inclined portions of each which connects and separates one said of said recesses and one of said connection portions as they extend toward said rotary shaft so as to form a gap between the outer surface of said back spring and the inner surface of said rotary shaft retainer; and said back spring comprises plural notches at both ends in the longitudinal direction thereof, which notches extend toward the center of said back spring in the longitudinal direction and each of which is formed at said recess and said peripheral inclined portions and a part of said connection portion.