Patent ID: 8663375

Claim:
An oil suppressing structure in an air drying device comprising: an outer case; a drying case in an interior of the outer case and having a large-diameter long cylindrical body portion and a small-diameter long cylindrical body portion integrally formed with the large-diameter long cylindrical body portion, a desiccating agent being filled in an interior of the large-diameter long cylindrical body portion; and a base plate fixed to a lower end of the drying case and comprising an inlet port and an outlet port for compressed air, wherein an oil adsorbing material is inserted into a space defined between an inner wall surface of the outer case, the small-diameter long cylindrical body portion and the base plate, the space in which the oil adsorbing material is provided having a radial cross-sectional area larger than a radial cross-sectional area of the small-diameter long cylindrical body portion.