| 摘要 |
PURPOSE: An air valve of a clutch booster is provided to secure structure improved in the durability by firmly attaching a rubber part and a guide ring and applying a housing member of a Teflon material. CONSTITUTION: An air valve of a clutch booster comprises a rubber part(2) having a cylindrical opening and shutting part(2a), a conical shape part(2b), and a stepped part(2c) formed between the opening and shutting part and the conical shape part, and comprises a guide ring(3) having a horizontal part(3a) surrounding the circumference of the opening and shutting part; a slant part(3b) surrounding the circumference of the conical shape part; and a vertical part(3c) surrounding the circumference of the stepped part. The opening and shutting part opens and shuts an air passage through contact with the air passage or separation from the air passage. The conical shape part is disposed to the rear of the opening and shutting part. The air valve further comprises a conical spring(4) fitted into the conical shape part. One front end of the spring comes in contact with the slant part and vertical part of the guide ring. The inner wall of a booster supports the other front end of the spring.
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