| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compressor in which oil can be extended to the whole circumferential surface of a piston when the piston is reciprocated in a cylinder bore.SOLUTION: A cylinder bore 2 is comprised of a cylindrical inner circumferential surface 41, and a circular bottom face 42 comprised of a part of the front face of a valve plate 6. In the bottom face 42, an opening face 19a of a discharge port 19 is formed. Along the circumferential direction of the bottom face 42, an annular grooved part 63 is formed which is indented from the bottom face 42 toward a side opposite to a piston 16. The grooved part 63 has a deepest portion 63a, a columnar outer circumferential side face 63b continuously extending to the inner circumferential surface 41 and arriving at the deepest portion 63a, and a truncated-cone inner circumferential side face 63c gradually shallower as extending from the deepest portion 63a toward the radial inside of the cylinder bore 2.</p> |
