A gear manufacturing method, the gear including an annular gear portion including teeth on an outer periphery, an annular support portion provided on an inner peripheral surface of the gear portion and supporting the gear portion, and a core portion provided inside the support portion, the method includes: a support portion molding step of molding the support portion by disposing the gear portion and the core portion in an annular mold and filling a resin between the gear portion and the core portion; and a support portion cooling step of cooling the support portion molded in the support portion molding step, a radial gap between the teeth of the gear portion and the mold before the support portion molding step is set to be smaller than a radial shrinkage amount of the support portion in the support portion cooling step.

A gear manufacturing method, the gear including an annular gear portion including teeth on an outer periphery, an annular support portion provided on an inner peripheral surface of the gear portion and supporting the gear portion, and a core portion provided inside the support portion, the method includes: a support portion molding step of molding the support portion by disposing the gear portion and the core portion in an annular mold and filling a resin between the gear portion and the core portion; and a support portion cooling step of cooling the support portion molded in the support portion molding step, a radial gap between the teeth of the gear portion and the mold before the support portion molding step is set to be smaller than a radial shrinkage amount of the support portion in the support portion cooling step.

One general aspect includes a composite sprocket. The composite sprocket also includes a skeleton having a connection interface and an outer portion having a rough tooth structure. The composite sprocket also includes an overlay formed on and over the outer portion of the skeleton and may include of a precision material and forming a high precision tooth structure over the rough tooth structure.

One general aspect includes a composite sprocket. The composite sprocket also includes a skeleton having a connection interface and an outer portion having a rough tooth structure. The composite sprocket also includes an overlay formed on and over the outer portion of the skeleton and may include of a precision material and forming a high precision tooth structure over the rough tooth structure.

The present invention relates to a multi-component gear (1) with an axis of rotation (X) and a first end face (11) and a second end face (12), having an inner part (20) and an outer part (30) made of a plastic with at least one injection-molding section (32), wherein the outer part (30) is arranged on an outer lateral surface (24) of the inner part (20) in a form-fitting and/or integral manner on the inner part (20), and wherein the outer part (30) on the first and/or the second end face (11, 12) has at least one tab (40) which is free-standing in the circumferential direction around the axis of rotation (X) and which protrudes over the relevant end face (11, 12) of the inner part (20). The present invention also relates to a gear (2) and a planetary gearset (3).

Extracorporeal circuit devices can be used for on-pump open-heart surgery to support surgical procedures such as coronary artery bypass grafting. In some cases, a centrifugal pump is used as part of an extracorporeal circuit. Centrifugal pump heads are described herein that induce flow on two sides of an impeller plate, and that can be conveniently mechanically assembled.

Extracorporeal circuit devices can be used for on-pump open-heart surgery to support surgical procedures such as coronary artery bypass grafting. In some cases, a centrifugal pump is used as part of an extracorporeal circuit. Centrifugal pump heads are described herein that induce flow on two sides of an impeller plate, and that can be conveniently mechanically assembled.

A high torque sprocket includes a body defining an outer periphery and a hub section defining an inner surface for engaging a bushing. A continuous toothed structure is disposed on the outer periphery of the body, and a textile reinforcement embedded in the body adjacent the inner surface of the hub section. The body is formed of a castable polymer material. In some cases, one or two optional flanges are disposed on side(s) of the body immediately adjacent the continuous toothed structure, in some aspects, a textile reinforcement may be embedded in a surface of the flange(s) immediately adjacent the continuous toothed structure. In some aspects, the high torque sprocket further includes a textile reinforcement embedded in the continuous toothed structure outer surface, and the textile reinforcement is selected from nylon, cotton, aramid, PTFE, and mixtures thereof.

The present invention relates to a gear ring carrier part (10) for a two- or multi-component gear (11), the gear ring carrier part (10) having a circular ring section (12) rotating in the circumferential direction about an axis of rotation (A), a gear ring (14) arranged radially on the outside of the circular ring section (12), and an extension (16) extending radially inward from the circular ring section (12), the extension (16) having a first extension face (30) and a second extension face (32), a number of first ribs (34) and an equal number of first pockets (36) being arranged on the first extension face (30), and/or a number of second ribs (38) and an equal number of second pockets (40) being arranged on the second extension face (30), the first ribs (34) and the first pockets (36) and/or the second ribs (38) and the second pockets (40) each extending radially and being arranged adjacent to one another in the circumferential direction. The invention also relates to a two-component or multi-component gear (11) with such a gear ring carrier part (10).

The present teachings generally include a composite rotor assembly comprising a shaft and a rotor body mounted to the shaft. The rotor body can include a core structure including a cured polymeric material wholly or partly defining plurality of lobes joined by adjacent root portions. The rotor body can also include a support structure continuously extending the length of the core structure to provide additional structural integrity to the rotor body. The support structure can be wholly or partially embedded within the core structure and can also be wrapped around the exterior of the core structure. In one example, the core structure includes an epoxy resin and the support structure includes a carbon fiber material.