Patent ID: 8123493

Claim:
A screw compressor comprising: a pair of rotor shafts disposed horizontally; bearings for supporting said rotor shafts; a bearing casing for accommodating said bearings; an oil sump formed in a bottom of said bearing casing, said oil sump being structured so as to allow a lower portion of said bearings to be soaked into oil for lubrication, wherein a pair of timing gears are mounted on one ends of said rotor shafts and accommodated within said bearing casing, said timing gears meshing with each other; an oil chamber provided separately from said bearing casing; an oil line connected between said oil sump and said oil chamber, wherein a height position of a connection of said oil line to said oil sump corresponds to a lower-limit height of an oil level in said oil sump for permitting lubrication of said bearings; and oil level detector disposed in said oil chamber.