Patent ID: 8578603

Claim:
A compressor comprising: a compressing device that is configured to compress fluid; a casing that receives the compressing device; a drive shaft that drives the compressing device; and a bearing device that rotatably supports the drive shaft relative to the casing, wherein: the casing includes a tubular member, which extends coaxially with respect to the drive shaft, and a cover member, which covers an end opening of the tubular member; the cover member is fixed to the tubular member by all-around welding; a welding bead is formed by the all-around welding in an outer peripheral surface of the casing along an entire circumference of the casing; the welding bead includes an overlapped portion, which is formed by overlapping of welding over a welding start point, at which the all-around welding is started; a thermally deformed portion, which is deformed by externally applied heat input, is formed in a diametrically opposite portion of the casing, which is diametrically opposite to the overlapped portion; and the thermally deformed portion is deformed symmetrically with respect to a welding distortion at the overlapped portion.