Patent ID: 9506469
Filing Date: 2016-11-29
CPC Classification: F04C,F04D

Claim Text:
1. An air compressor comprising: a compressor body that compresses air; an electric motor as a power source for the compressor body; a gear mechanism that transmits power of the electric motor to the compressor body; a gear casing that is connected between a casing of the compressor body and a casing of the electric motor and houses the gear mechanism; a partitioning wall that defines an internal space of the gear casing and an internal space of the casing of the electric motor; a screw seal that is located in a through hole formed in the partitioning wall, where a rotating shaft of the electric motor passes through, and makes an air flow from an electric motor side to a gear mechanism side in the through hole with rotation of the rotation shaft, bearings that support the rotating shaft, at least one bearing being arranged on the gear mechanism side of the partitioning wall, such that a rotor of the electric motor has an overhang structure relative to the bearings that support the rotating shaft, and a radial communication hole that communicates the electric motor side and an outside of the air compressor without going through the internal space of the casing of the electric motor, wherein