A method of lubricating a coupling shaft of a gear pump includes communicating lubricant from a first gear stage along a first splined end section of the coupling shaft and through a first slot in a first radial shoulder of the coupling shaft, and also communicating lubricant from a second gear stage along a second splined end section of the coupling shaft and through a second slot in a second radial shoulder of the coupling shaft. The first radial shoulder is axially spaced from the second radial shoulder by an axial distance SA along an axis of rotation of the coupling shaft. The first and second slots each define a lowermost radial dimension SR from the axis of rotation, with a ratio SR/SA of 0.25-0.77.

A method of lubricating a coupling shaft of a gear pump includes communicating lubricant from a first gear stage along a first splined end section of the coupling shaft and through a first slot in a first radial shoulder of the coupling shaft, and also communicating lubricant from a second gear stage along a second splined end section of the coupling shaft and through a second slot in a second radial shoulder of the coupling shaft. The first radial shoulder is axially spaced from the second radial shoulder by an axial distance SA along an axis of rotation of the coupling shaft. The first and second slots each define a lowermost radial dimension SR from the axis of rotation, with a ratio SR/SA of 0.25-0.77.

A braking apparatus according to one embodiment of the present invention is a braking apparatus for use in an electrical motor, and comprises a braking unit which locks the electrical motor in position, a voltage detection unit which detects a voltage applied to the braking unit, and an observing unit which recognizes a voltage variation pattern and, based on the voltage variation pattern, observes the released and actuated states of the braking unit.

A braking apparatus according to one embodiment of the present invention is a braking apparatus for use in an electrical motor, and comprises a braking unit which locks the electrical motor in position, a voltage detection unit which detects a voltage applied to the braking unit, and an observing unit which recognizes a voltage variation pattern and, based on the voltage variation pattern, observes the released and actuated states of the braking unit.

A failsafe pin for providing a backup load path for attaching a gas turbine engine to an aircraft structure is provided with a driving element that allows a torque to be provided to the pin in order to check whether the pin has been engaged, and thus whether a primary load path has failed. The pin is provided with anti-tamper arrangements in order to ensure that the pin itself is not compromised when being tested for engagement.

A Cardan drive for connecting a power take-off (PTO) of an agricultural vehicle to an input shaft of an agricultural implement, wherein the Cardan drive has a primary shaft and a secondary shaft that are mutually connected via a double universal joint to obtain a homokinetic connection between the primary and the secondary shaft, wherein the double universal joint has an intermediate element formed substantially by two yokes of the double universal joint, wherein at least one of the two yokes is connected via bearings to a frame provided for attachment to the agricultural implement.

A Cardan drive for connecting a power take-off (PTO) of an agricultural vehicle to an input shaft of an agricultural implement, wherein the Cardan drive has a primary shaft and a secondary shaft that are mutually connected via a double universal joint to obtain a homokinetic connection between the primary and the secondary shaft, wherein the double universal joint has an intermediate element formed substantially by two yokes of the double universal joint, wherein at least one of the two yokes is connected via bearings to a frame provided for attachment to the agricultural implement.

The invention relates to a coupling device for connecting a first shaft (10) to a second shaft (12) by means of two flanges (16, 18, 22, 24) that are meshed with one another, wherein the flanges are provided or designed with means (30, 32, 111, 211, 311, 317, 319, 321) of enabling the axial and/or radial relative misadjustment thereof due to a misalignment of the shafts to be visually observed. According to one variant, at least one of the flanges or an element (20, 26) meshed with the two flanges is provided with at least one transducer (50, 60, 70, 80, 90, 94) for generating an electrical signal and/or acoustic signal from a mechanical movement, wherein said transducer is designed to generate the signal on the basis of a periodic movement of the flanges relative to one another, at least if the relative movement of the two shafts to one another, which occurs as the shafts rotate due to misalignment of said shafts, exceeds a certain value.

The invention relates to a coupling device for connecting a first shaft (10) to a second shaft (12) by means of two flanges (16, 18, 22, 24) that are meshed with one another, wherein the flanges are provided or designed with means (30, 32, 111, 211, 311, 317, 319, 321) of enabling the axial and/or radial relative misadjustment thereof due to a misalignment of the shafts to be visually observed. According to one variant, at least one of the flanges or an element (20, 26) meshed with the two flanges is provided with at least one transducer (50, 60, 70, 80, 90, 94) for generating an electrical signal and/or acoustic signal from a mechanical movement, wherein said transducer is designed to generate the signal on the basis of a periodic movement of the flanges relative to one another, at least if the relative movement of the two shafts to one another, which occurs as the shafts rotate due to misalignment of said shafts, exceeds a certain value.

A clutch includes: a first clutch tooth that rotates integrally with a first rotation element included in a speed reducer; a second clutch tooth that rotates integrally with a second rotation element included in the speed reducer; and a fixed clutch tooth that moves between the first clutch tooth and the second clutch tooth. The fixed clutch tooth includes: a first mode in which the speed reducer operates at a second reduction ratio by meshing only with the first clutch tooth to fix the first rotation element, a second mode in which the speed reducer operates at a first reduction ratio by meshing only with the second clutch tooth to fix the second rotation element, and a both-engaging mode of meshing with each of the first clutch tooth and the second clutch tooth when changing a mode between the first mode and the second mode.