Abstract: A semi-floating bearing (bearing) including: a main body, which has an annular shape, extends in a direction intersecting with a vertical direction, and has a shaft inserted through the main body; a radial bearing surface formed on an inner peripheral surface of the main body; and a plurality of oil supply grooves, which extend in an axial direction of the main body, are formed in the radial bearing surface at positions excluding a lowermost portion of the radial bearing surface in the vertical direction at intervals in a circumferential direction, and are arranged so as to be line-symmetric with each other with respect to a vertical axis in a cross section orthogonal to the axial direction of the radial bearing surface such that the interval between the oil supply grooves in the circumferential direction is the largest on a vertically lower side.

Abstract: A turbocharger includes: a bearing portion which is provided in a turbine housing; a shaft rotatably inserted into a bearing hole of the bearing portion; an attaching member fixed to the shaft; and a valve coupled to the shaft via the attaching member and configured to open and close a flow path opened to an internal space along with rotation of the shaft. The attaching member includes: a base portion provided with an insertion hole of the shaft; and an extension portion integrally formed with the base portion and extending from the base portion in a radial direction of the shaft to thereby hold the valve. The base portion is provided at least at a part of a range of the shaft in a circumferential direction of the shaft, and protrudes more in the radial direction of the shaft than the bearing portion.

Abstract: A turbocharger includes a bearing portion having an end as an inner end surface located within a turbine housing in a penetrating direction of a bearing hole; a shaft rotatably supported in the bearing hole, one end thereof located within the turbine housing and the other end thereof located outside the turbine housing; an attaching plate fixed to the shaft, including an inner facing surface facing the inner end surface in an axial direction of the shaft; and a valve coupled to the shaft via the attaching plate to open and close a flow path opened to an internal space of the turbine housing. An inner radial groove is formed in at least one of the inner end surface and the inner facing surface. The inner radial groove extends in the radial direction of the shaft to allow a part of an exhaust gas flowing within the turbine housing to flow therethrough.

Abstract: A turbocharger includes: a turbine housing including an internal space formed therein; a bearing portion provided in the turbine housing; a shaft rotatably inserted into a bearing hole in a state where at least one end protrudes more to an inside of the turbine housing than the bearing portion; and a valve fixed to the shaft and configured to open and close a flow path opened to the internal space. The bearing portion includes a protrusion portion which protrudes from an inner wall of the turbine housing. The radial hole of the protrusion portion penetrates the bearing portion in a radial direction of the shaft, from the outer circumferential surface of the bearing portion to the bearing hole.

Abstract: A turbocharger includes: a bearing portion having an end as an inner end surface located within a housing (turbine housing) in a penetrating direction of a bearing hole; a shaft rotatably supported in the bearing hole, one end thereof located within the housing and the other end thereof located outside the housing; an attaching plate fixed to the shaft, including an inner facing surface facing the inner end surface in an axial direction of the shaft; and a valve coupled to the shaft via the attaching plate to open and close a flow path opened to an internal space of the housing. An inner radial groove is formed in one or both of the inner end surface and the inner facing surface. The inner radial groove extends in the radial direction of the shaft to allow a part of an exhaust gas flowing within the housing to flow therethrough.

Abstract: A turbocharger includes: a bearing portion which is provided in a turbine housing; a shaft rotatably inserted into a bearing hole of the bearing portion; an attaching member fixed to the shaft; and a valve coupled to the shaft via the attaching member and configured to open and close a flow path opened to an internal space along with rotation of the shaft. The attaching member includes: a base portion provided with an insertion hole of the shaft; and an extension portion integrally formed with the base portion and extending from the base portion in a radial direction of the shaft to thereby hold the valve. The base portion is provided at least at a part of a range of the shaft in a circumferential direction of the shaft, and protrudes more in the radial direction of the shaft than the bearing portion.

Abstract: A turbocharger includes: a turbine housing including an internal space formed therein; a bearing portion provided in the turbine housing; a shaft rotatably inserted into a bearing hole in a state where at least one end protrudes more to an inside of the turbine housing than the bearing portion; and a valve fixed to the shaft and configured to open and close a flow path opened to the internal space. The bearing portion includes a protrusion portion which protrudes from an inner wall of the turbine housing. The radial hole of the protrusion portion penetrates the bearing portion in a radial direction of the shaft, from the outer circumferential surface of the bearing portion to the bearing hole.

Abstract: A turbocharger includes: a suction passage into which a fluid is sucked from outside of a compressor housing; an outlet passage that guides the fluid, which is sucked through the suction passage and compressed, to the outside of the compressor housing; an opening portion formed in a wall surface of the compressor housing and serving as an opening of the suction passage; a return passage which makes the outlet passage and the suction passage communicate with each other through the opening portion, thereby returning the compressed fluid from the outlet passage to the suction passage; and an air bypass valve which opens and closes the opening portion. A level of a bottom surface of the return passage located on a vertically lower side therein declines from the outlet passage toward the suction passage without ever rising.

Abstract: A turbocharger includes: inlet and discharge passages to guide a fluid to a turbine wheel and discharge the fluid therefrom; a bypass passage communicating between the inlet passage and the discharge passage to bypassing the turbine wheel; a seat surface facing the discharge passage, in which an end of the bypass passage opens; and a mechanism to open and close the end of the bypass passage. The mechanism includes: a stem turnably supported by the turbine housing; and a valve body to open and close the end of the bypass passage. The seat surface tilts from a plane perpendicular to a turbine shaft in a way that a side on which the stem is disposed is located farther from a discharge port of the discharge passage than an opposite side of the end of the bypass passage from the side on which the stem is disposed.

Abstract: A turbocharger includes: a suction passage into which a fluid is sucked from outside of a compressor housing; an outlet passage that guides the fluid, which is sucked through the suction passage and compressed, to the outside of the compressor housing; an opening portion formed in a wall surface of the compressor housing and serving as an opening of the suction passage; a return passage which makes the outlet passage and the suction passage communicate with each other through the opening portion, thereby returning the compressed fluid from the outlet passage to the suction passage; and an air bypass valve which opens and closes the opening portion. A level of a bottom surface of the return passage located on a vertically lower side therein declines from the outlet passage toward the suction passage without ever rising.

Abstract: A mold for use in producing a molded body of an elastomer has a holding layer and a releasing layer on an inner periphery surface of a main body of a die. The releasing layer is formed of an addition two-component liquid silicone having a polysilazane-based or polysiloxane-based chain as a main chain, contains 0.5 mass % or less of a component which volatilizes at a curing temperature of a liquid elastomer raw material, does not contain silica, has International Rubber Hardness Degree of 50 to 85 degrees, and contains a solid lubricant having an average particle size of 2 to 20 ?m. The present invention also provides a method for manufacturing a blade for an electrophotographic apparatus by using the mold and a developer amount controlling blade having specific load length ratio and ten-point average roughness in which a blade member is manufactured with the method.

Abstract: A developer level control blade is provided which can form a developer layer on a developer carrying member in a proper thickness and in a uniform state and can keep the developer, in particular, color toner particles from melt-adhering to the charge control face so that faulty images such as lines and non-uniformity can be kept from occurring. Also provided is a process for manufacturing this developer level control blade. The process for manufacturing the developer level control blade is characterized by having the steps of extruding a blade member material melted to liquefy, covering therewith a support member thin-plate metal member at an edge portion thereof to join the both together, and cooling the blade member material to solidify, followed by cutting in a preset length.

Abstract: A mold for use in producing a molded body of an elastomer has a holding layer and a releasing layer on an inner periphery surface of a main body of a die. The releasing layer is formed of an addition two-component liquid silicone having a polysilazane-based or polysiloxane-based chain as a main chain, contains 0.5 mass % or less of a component which volatilizes at a curing temperature of a liquid elastomer raw material, does not contain silica, has International Rubber Hardness Degree of 50 to 85 degrees, and contains a solid lubricant having an average particle size of 2 to 20 ?m. The present invention also provides a method for manufacturing a blade for an electrophotographic apparatus by using the mold and a developer amount controlling blade having specific load length ratio and ten-point average roughness in which a blade member is manufactured with the method.

Abstract: A developer level control blade is provided which can form a developer layer on a developer carrying member in a proper thickness and in a uniform state and can keep the developer, in particular, color toner particles from melt-adhering to the charge control face so that faulty images such as lines and non-uniformity can be kept from occurring. Also provided is a process for manufacturing this developer level control blade. The process for manufacturing the developer level control blade is characterized by having the steps of extruding a blade member material melted to liquefy, covering therewith a support member thin-plate metal member at an edge portion thereof to join the both together, and cooling the blade member material to solidify, followed by cutting in a preset length.

Abstract: To provide a developer level control blade which ensures uniform wear of its blade member, enables well precise control of the touch pressure against the developer carrying member to achieve a proper pressure against the developer, and can keep the toner melt adhesion from occurring even in long-term service, a developer level control blade is used which has a stated peripheral shape, is to be disposed in touch with a developer carrying member for transporting a developer, holding the developer on its surface, and is used to control the level of the developer to be held on the surface of the developer carrying member. The control blade has a laminated structure in which a support member and a blade member are bonded, and the blade member has a stated surface free energy.

Abstract: A blade member manufacturing process using no mold and a developer quantity control blade manufacturing process using this blade member are disclosed in which a material for the blade member is extruded onto a charge control face face-transferring sheet in a uniform thickness, and solidified to form a layer, and the layer is cut into the shape of a blade member.

Abstract: A blade member manufacturing process using no mold and a developer quantity control blade manufacturing process using this blade member are disclosed in which a material for the blade member is extruded onto a charge control face face-transferring sheet in a uniform thickness, and solidified to form a layer, and the layer is cut into the shape of a blade member.

Abstract: To provide a developer level control blade which ensures uniform wear of its blade member, enables well precise control of the touch pressure against the developer carrying member to achieve a proper pressure against the developer, and can keep the toner melt adhesion from occurring even in long-term service, a developer level control blade is used which has a stated peripheral shape, is to be disposed in touch with a developer carrying member for transporting a developer, holding the developer on its surface, and is used to control the level of the developer to be held on the surface of the developer carrying member. The control blade has a laminated structure in which a support member and a blade member are bonded, and the blade member has a stated surface free energy.

Abstract: A blade member manufacturing process using no mold and a developer quantity control blade manufacturing process using this blade member are disclosed in which a material for the blade member is extruded onto a charge control face face-transferring sheet in a uniform thickness, and solidified to form a layer, and the layer is cut into the shape of a blade member.