A tensioner comprising a base defining a hole, the hole having a center C, the hole having a diameter sufficient to receive a driven pulley, a rotary arm engaged with the base by a retaining member connected to the base, the rotary arm rotatable about the center C, a pivot arm mounted to the rotary arm on a pivot, the pivot offset from center C, a first pulley journalled to the rotary arm, a second pulley journalled to the pivot arm, a torsion spring engaged between the rotary arm and the pivot arm for biasing the second pulley toward the first pulley, a damping member frictionally engaged between the base and the rotary arm, and the rotary arm defining a portion for receiving a first pulley fastener whereby a first pulley position is adjustable.

A locomotion subassembly for a biped robot is disclosed. The locomotion subassembly includes several unique energy transfer mechanisms and arrangements for efficiently powering the motion of the robot.

An internal combustion engine including a cylinder crankcase and a cylinder head with an integrated height-adjustable fan attachment for elastic V-ribbed belts. 2. An internal combustion engine including a crankcase (1), at least one device for driving a fan, in particular of a vehicle, in particular a commercial vehicle, is described. The internal combustion engine includes a fan bracket (3) and a bearing device (5) via which the fan is displaceably situated relative to the crankshaft of an internal combustion engine of the drive unit; and a belt drive via which the fan is drivable, including a first belt pulley and a second belt pulley which are in drive connection via a belt (8), the first belt pulley being situated on the bearing device (5).

A tensioning system including a magnetic stop is provided. The tensioning system includes a tensioner arm and a support. The tensioner arm is mounted on the support for pivoting movement. The support includes a support magnetic or ferromagnetic element on at least a first surface thereof. The tensioner arm includes a tensioner arm magnet on at least a second surface thereof that faces the first surface of the support.

A tensioner comprising a base, a first pivot arm pivotally engaged to the base, a first pulley journalled to the first pivot arm, a second pivot arm pivotally engaged to the base, a second pulley journalled to the second pivot arm, a flexible tensile member having a toothed engagement with the first pivot arm and a toothed engagement with the second pivot arm whereby the first pivot arm and the second pivot arm move in a coordinated manner, and a tensioner assembly pivotally engaged to the base and engaged with the flexible tensile member.

In an aspect, a tensioner is provided for maintaining tension in an endless drive member in a belt-in-oil drive system. The tensioner includes a base that is mountable to a stationary structure and that has a circumferential wall that defines an arm pivot axis, an arm having a radially inner arm surface, and an endless drive member engagement surface that is engageable with an endless drive member, a bushing positioned between the radially inner arm surface and the circumferential wall of the base cup, and a tensioning spring. The arm is supported on the base cup via the bushing. The tensioning spring is positioned to bias the arm in a first direction about the arm pivot axis.

A multi-axis tool for pre-tensioning a camshaft-drive element tensioner in an engine includes a housing having first and second faces and a length. The housing defines a first passage arranged along a first axis and a second passage arranged along a second axis. The second axis is parallel to the first axis and each passage extends through the length of the housing. The tool also includes a first lug arranged on and extending beyond the first face. The first passage extends through the first lug. The tool also includes a second lug extending beyond the second face and arranged along a third axis that is parallel to the first axis. An indicator rod is arranged partially within the second passage and configured to selectively extend beyond the first face. An elastic element is arranged inside the second passage and configured to extend the indicator rod beyond the first face.

A belt drive for a work machine is disclosed. The belt drive has a drive belt that is wound around an input pulley and an out put pulley. The input pulley is rotated by a motor, and when rotated, transfers rotational motion to the output pulley by the drive belt. A controller is in communication with an input speed sensor that measures the input pulley and an output speed sensor that measures the output pulley. The controller calculates an input speed from the measurement of the input pulley, and an output speed from the measurement of the output pulley. The controller also sends a damaged belt signal to an operator control of the work machine when the output speed is lower by a predetermined threshold than the input speed.

A tensioning device for applying a tensioning force to a component has a cylinder housing having a hydraulic medium filled axial cylinder, a piston rod guided in the cylinder recess telescoping in a longitudinal axis direction, and displaceable back and forth, projecting out of the cylinder housing at one end, a piston guided in an axial piston rod recess, and displaceable, back and forth, by a limited amount, in the longitudinal axis direction, from a moved-in position to a moved-out position, and a spring element connected with the piston driving the piston in an outward piston movement direction parallel to the longitudinal axis. Force is applied to the piston by the spring element and by the hydraulic medium, so that inward movement of the piston rod into the cylinder housing (8), in the inward piston rod movement direction (77), brings about inward movement of the piston into the piston rod.

The problem to be solved by the present invention lies in making it possible to reduce costs and to reduce the size of an oil pump, without impeding the degree of freedom in chain layout. An oil jet 1 is constructed in order to supply lubricating oil to a tension-side span of a chain C while also causing a tensioning force to act on a slack-side span of the chain C. The oil jet arm 1 is provided with a pivoting-side part 2A, and a tip-end side part 2B which is provided in such a way as to be pivotable about the pivoting-side part 2A and is acted on by a pressing force from a piston 41 of a hydraulic tensioner 4, and an oil ejection hole 22a for ejecting to the outside oil supplied from an oil discharge hole 41a in the piston 41 is formed in the tip-end side part 2B. Oil ejected from the oil ejection hole 22a is supplied to a portion E on the meshing start side with a sprocket 100 on the tension-side span of the chain C.