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In a rotary compressor unit including a compressor comprising a rotor rotatable in a cylinder, a blade in contact with an outer surface of the rotor and reciprocated thereby in a radial direction in a closed chamber formed in the cylinder, the chamber being defined by longitudinally spaced apart end

In a rotary compressor unit including a compressor comprising a rotor rotatable in a cylinder, a blade in contact with an outer surface of the rotor and reciprocated thereby in a radial direction in a closed chamber formed in the cylinder, the chamber being defined by longitudinally spaced apart end plates on both sides of the cylinder, suction and discharge and passages opening through the end plates into the closed chamber, and a check valve provided at least in the suction passage, the check valve comprises a fluid diode.

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A rotary compressor, comprising: a sealed horizontal casing; a hollow cylinder secured to an inner surface of said casing; two end plates secured to both ends of said cylinder; a roller eccentrically rotatable within said cylinder; shaft means for rotating said roller; a closed chamber radially exte

A rotary compressor, comprising: a sealed horizontal casing; a hollow cylinder secured to an inner surface of said casing; two end plates secured to both ends of said cylinder; a roller eccentrically rotatable within said cylinder; shaft means for rotating said roller; a closed chamber radially extending through said cylinder, said chamber being defined by lower portions of said end plates, said end plates being made from a single piece of metal plate; a blade in contact with an outer surface of said roller to reciprocate in said closed chamber, the axial width of said chamber being defined by said two end plates; suction and discharge passages provided through said end plates for sending a lubricant contained in a bottom portion of said casing outside of said closed chamber into and out of said closed chamber; and a fluid diode type check valve provided in said suction passage, said check valve being press formed integrally with said metal plate.