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 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 drive chain system comprising a chain with an alternating succession of inner chain links and outer chain links, each inner chain link having a pair of inner link plates contacting the lateral faces of two rollers and each outer chain link having a pair of two outer link plates contacting the inner link plates of adjacent inner chain links. A pin connects two outer link plates and two inner link plates and a roller, wherein the inner surfaces of a pair of opposite outer link plates comprise protrusions in the area between the adjacent inner link plates. The system comprises a chainring with a plurality of teeth, which teeth taper laterally towards their respective tip.

A device for adjusting a sprocket of a chain drive includes a bearing journal having a free end and a fixed end, a rotary bearing arranged on the bearing journal, and a sprocket guided on the rotary bearing. A stop is formed on the bearing journal and at least one spring element is arranged between the rotary bearing and the stop, wherein a preloading means is provided via a clamp which preloads the rotary bearing against the spring element.

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 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 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.

A sprocket comprising teeth for engaging one or more chains is provided with datum connection portions which releasably support a datum body, such as a tensioned wire in a predefined position. The datum body provides a temporary reference or datum element or surface from which the position of the wear surfaces of the sprocket teeth may be determined by eye or by measurement, particularly in the radial direction. The teeth may further comprise a set of markings corresponding to angularly spaced reference planes intersecting at the sprocket axis. The markings are preferably arranged on the crown or radially outward surface of the teeth and are used to determine wear in the circumferential direction.

A bicycle chainring for engagement with a drive chain includes a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring. The plurality of teeth include a first group of teeth and a second group of teeth.

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.