Abstract: A process of production of a compressor shoe superior in durability and reduced in manufacturing cost, wherein a process of quenching the shoe is performed in a vacuum, inert gas, or modified gas so as to prevent oxidation of the chrome and manganese of the surface of the material or the quenching process is performed after forming an antioxidation film on the surface of the material to prevent the oxidation of the chrome and manganese.

Abstract: A cutting process S1 cuts a wire 1 into cut pieces each having a volume approximately equivalent to that of a desired shoe 11. A forging process S2 sequentially forges cut pieces 2 with forging dies 13, 23, and 33 having three cavities 13c, 23d, and 33e respectively, and obtains a steel sphere 8. A finishing process S3 obtains a shoe-shaped material 10 from the steel sphere 8 without a heat treatment, and carries out a heat treatment to the obtained material 10, thereby to obtain a shoe 11 for a compressor.

Abstract: Compressor shoe is manufactured by cutting a wire into cut pieces each having a volume approximately equivalent to that of a desired shoe. The cut piece is sequentially forged with forging dies having three cavities. The cut piece is first forged to a cylindrical shape with a small rounded portion, then to a rugby ball shape, and then to a shape corresponding to a shoe shape. A finishing step, including heat treatment, is then carried out to obtain a compressor shoe.

Abstract: A shoe in a swash plate type compressor has a spherical engaging surface that engages with a piston, and a plane engaging surface that is substantially a plane and engages with a swash plate. The plane engaging surface includes a substantially planar sliding surface, a substantially radially extending peripheral surface and a connecting surface. The sliding surface is formed near a center of the plane engaging surface and slides over the swash plate. The peripheral surface is formed near a periphery of the plane engaging surface, is formed at a distance from the sliding surface away from the surface of the swash plate so as to form an inwardly-directed step in the plane engaging surface, and is connected to the spherical engaging surface at its outer periphery. The connecting surface connects the sliding surface to the peripheral surface.

Abstract: A method of producing an aluminum ball, comprising the steps of: a cutting step of cutting a bar-shaped blank formed of a material containing aluminum as a major component, into cut pieces; an aluminum-ball forming step of forming each of the cut pieces into the aluminum ball by semi-closed die forging, said aluminum ball having a flash formed on an outer circumferential surface thereof; and a flash removing step of removing the flash from the aluminum ball formed by forging. Also disclosed is a method of producing a shoe for a compressor, from the aluminum ball.

Abstract: A cutting process S1 cuts a wire 1 into cut pieces each having a volume approximately equivalent to that of a desired shoe 11. A forging process S2 sequentially forges cut pieces 2 with forging dies 13, 23, and 33 having three cavities 13c, 23d, and 33e respectively, and obtains a steel sphere 8. A finishing process S3 obtains a shoe-shaped material 10 from the steel sphere 8 without a heat treatment, and carries out a heat treatment to the obtained material 10, thereby to obtain a shoe 11 for a compressor.

Abstract: A process of production of a compressor shoe superior in durability and reduced in manufacturing cost, wherein a process of quenching the shoe is performed in a vacuum, inert gas, or modified gas so as to prevent oxidation of the chrome and manganese of the surface of the material or the quenching process is performed after forming an antioxidation film on the surface of the material to prevent the oxidation of the chrome and manganese.

Abstract: Compressor shoe is manufactured by cutting a wire into cut pieces each having a volume approximately equivalent to that of a desired shoe. The cut piece is sequentially forged with forging dies having three cavities. The cut piece is first forged to a cylindrical shape with a small rounded portion, then to a rugby ball shape, and then to a shape corresponding to a shoe shape. A finishing step, including heat treatment, is then carried out to obtain a compressor shoe.

Abstract: By changing the inclination of a cam plate, the stroke of a piston is changed to change the discharge displacement a of compressor. A hinge mechanism is positioned between a rotating support and the cam plate. The hinge mechanism includes a guide pin, and the guide pin transfers the rotational motion of the rotating support to the cam plate and permits inclination of the cam plate. At least a part of the guide pin is hollow.

Abstract: In a vibratory parts-feeder including; a feeder bowl in which a spiral track is formed, a vertical exciter with first electro-magnetic coil for exciting the feeder bowl in the vertical direction, a horizontal exciter with second electro-magnetic coil for exciting the feeder bowl in the horizontal direction, horizontal leaf springs for supporting the feeder bowl so as to be vibratile in the vertical direction, and vertical leaf springs for supporting the feeder bowl so as to be vibratile in the horizontal direction, wherein there is a phase difference between the currents flowing through the first and second electro-magnetic coils and the feeder bowl is elliptically vibrated, the improvements in which a phase adjusting circuit is connected to the first or second electro-magnetic coil, voltage adjusting circuits are connected to the first and second electro-magnetic coils and the ratio of the longer axis to the shorter axis of the elliptical vibration and the inclination of the longer axis thereof are varied wi