Patent ID: 8066100

Claim:
An oil pan comprising: a partition having a concave part forming a first chamber and partitioning the first chamber from a second chamber, the second chamber being adjacent to and below the first chamber, the first chamber communicating with an object lubricated by oil, the first chamber being configured to store oil; an oil suction opening located inside the first chamber and connected to an oil pump, the oil pump being configured to deliver oil stored in the first chamber to the object; a communicating opening which is a through hole provided at a bottom of the concave part of the partition equivalent to a lowest position of a bottom face of the first chamber and which is formed so that oil can be discharged downward from the first chamber into the second chamber when the oil is discharged outside from the second chamber; and a lid member arranged so that it can close the communicating opening from the outside and downside of the concave part, wherein the lid member is made of material having smaller specific gravity than oil.