A chain wheel includes a body and protrusions extending outward along the periphery of the body for receiving links of a chain. The protrusions are connected releasably to the body and are spring-mounted independently of each other in a peripheral direction relative to the body.

A chain driving sprocket for a trolley conveyor. The chain drive sprocket includes a disc shaped central body, chain rings including a first sprocket ring and a second sprocket ring. The first sprocket ring and the second sprocket ring are each removably affixable to the disc shaped central body. The first and second sprocket rings are each provided with spaced apart teeth pairs having a curved surface therebetween, sized and shaped to receive a horizontal shaft in a vertical roller unit of the trolley conveyor, for driving the chain of a trolley conveyor. The disc shaped central body further includes curved rectangular shaped protrusions which extend radially outward on the circumferential surface of the disc shaped body. The chain rings are configured to be interchangeably coupled to each of the two sides of the disc shaped central body, thereby reducing manufacturing cost and reducing maintenance costs, since the chain rings may be replaced when the teeth pairs wear. Horizontal roller units are supported by protrusions, thereby improving stability and reducing noise generation.

The present invention relates to an idle gear set for an overhead poultry conveyor, the gear set including a variable structure chain gear capable of being adjusted in size according to the needs of a user. Specifically, an idle gear set for an overhead poultry conveyor includes a chain gear for moving a roller assembly, the chain gear comprises: a pair of plates vertically spaced apart and arranged in parallel; and a plurality of chain guides interposed between the pair of plates, and radially arranged along the circumferences of the plates, wherein the chain guides are arranged to be spaced apart such that a mounting groove into which the roller assembly is inserted can be formed between the chain guide and another adjacent chain guide.

A bicycle has a spider including a torque input section and at least one torque output section; a crank assembly coupled with the spider through the torque input section and applying an input torque to the spider; a chainring mounted to the spider through the at least one torque output section and receiving an output torque from the spider; a gauge disposed and oriented generally along a tangential direction or a quasi-tangential direction with respect to the torque input section and the at least one torque output section; and a circuitry coupled to the gauge and receiving a signal from the gauge.

A rotary chain jack may include a frame, a dual chain wheel rotatably coupled to the frame, and a stopper assembly mechanically coupled to the frame. The stopper assembly may include latches. The stopper assembly may be positioned to selectively engage a chain passing over the dual chain wheel. The rotary chain jack may be used to moor offshore structures.

A sprocket is provided for arrangement on a drive shaft, the sprocket having a gear rim which has an externally toothed gear ring and a ring carrier, and a sleeve body, wherein the ring carrier has a recess for receiving the sleeve body and the sleeve body has a recess for receiving the drive shaft so that the gear rim can be arranged on the drive shaft with the sleeve body interposed there between, wherein the sleeve body is provided with a thread on its outer lateral surface and wherein the recess of the ring carrier provided for receiving the sleeve body has on the inner side thereof facing the sleeve body a thread corresponding to the thread of the sleeve body.

A device for translating a scraper of droppings covering a corridor of a livestock building. The device includes a chain secured to the scraper, a first sprocket secured to a first end of the chain and a second sprocket secured to a second end of the chain. The first sprocket is rotated by a first motor and the second sprocket is rotated by a second motor in the opposite direction of the first sprocket. A controller controls power supply to the motors and takes states including: a driving state of the scraper in a first direction, wherein the first motor is supplied with power and the power supply of the second motor is cut off; and a driving state of the scraper in a direction opposite to the first direction, wherein the second motor is supplied with power and the power supply of the first motor is cut off.

A bicycle capable of measuring power is disclosed. The bicycle comprises a spider including a torque input section and at least one torque output section; a crank assembly coupled with the spider through the torque input section and applying an input torque to the spider; a chainring mounted to the spider through the at least one torque output section and receiving an output torque from the spider; a gauge disposed and oriented generally along a tangential direction or a quasi-tangential direction with respect to the torque input section and the at least one torque output section; and a circuitry coupled to the gauge and receiving a signal from the gauge.

A drive system for a vehicle includes a chain ring and a drive chain. The chain ring has a plurality of teeth serially arranged and joined to one another. A first subset of teeth has a first outer face that applies a lateral pressure to a link of a drive chain in a first direction. A second subset of teeth has a second outer face that applies a lateral pressure to another link of a drive chain in a second direction. The teeth all have substantially the same width. The top surfaces of the teeth are offset from the centerline of the drive chain. The centerlines of the top surfaces of the teeth are arranged asymmetrically on one side of the centerline of the drive chain.

A bicycle rotor comprises a base portion and at least one chain engagement portion. The base portion is configured to rotate around a rotational center axis of the bicycle rotor. The base portion is at least partly made of a first resin material. The first resin material has a first Young's modulus. The at least one chain engagement portion is provided on the base portion. The at least one chain engagement portion is at least partly made of a second resin material. The second resin material has a second Young's modulus. The first Young's modulus is higher than the second Young's modulus.