ROTARY COMPRESSOR

A rotary compressor having front, and rear housings positioned at the ends of a hollow shell, a horizontal cylinder disposed in the shell and having pressure plates attached to the front and rear ends thereof and further comprising a front housing means interposed between the front housing and the front pressure plate for defining a first front chamber connected by fluid passage means to said inlet port, between the inner wall of said front housing and the outer wall of said front housing means, and a second front chamber connected by fluid passage means to said suction chambers of said cylinder, between the inner wall of said front housing means and the outer face of said front pressure plate, said front housing means having a through-hole to connect said first and second front chambers, and channels adjacent to said oil reservoir to connect said first and second front chambers to said oil reservoir, and; A REAR HOUSING MEANS INTERPOSED BETWEEN THE REAR HOUSING AND THE REAR PRESSURE PLATE FOR DEFINING A FIRST REAR CHAMBER CONNECTED FLUID PASSAGE MEANS TO SAID INLET PORT, BETWEEN THE INNER WALL OF SAID REAR HOUSING AND THE OUTER WALL OF SAID REAR HOUSING MEANS, AND A SECOND REAR CHAMBER BY FLUID PASSAGE MEANS CONNECTED TO SAID SUCTION CHAMBERS OF SAID CYLINDER, BETWEEN THE INNER WALL OF SAID REAR HOUSING MEANS AND THE OUTER FACE OF SAID REAR PRESSURE PLATE, SAID REAR HOUSING MEANS HAVING A THROUGH-HOLE TO CONNECT SAID FIRST AND SECOND REAR CHAMBERS, AND CHANNELS ADJACENT TO SAID OIL RESERVOIR TO CONNECT SAID FIRST AND SECOND REAR CHAMBERS TO SAID OIL RESERVOIR.