Abstract: A pulley device for a transmission element having a pulley, a bearing, and at least one sleeve mounted freely in the bore of the inner ring of the bearing. The pulley device includes at least one annular protection shield, the shield retained axially in a first element from the pulley and coming into immediate proximity with the other element, the other element having at least one shoulder projecting radially ensuring that it is axially retained with the shield.

Abstract: A self-aligning apparatus for a lifting system includes a structure which includes a first element having a first projecting free end and a second projecting free end which each receive at least one sheave at a point of attachment to the first element, and at least two first points of rotation. The at least one sheave cooperates with at least one wire. The at least two first points of rotation are arranged above the at least one sheave's point of attachment to the first element so that the apparatus self-aligns during use in an uneven loading event.

Abstract: An equalizing rigging block for use with a synthetic roundsling is disclosed. The rigging block includes in preferred embodiments (a) a flatter and wider sheave to better accommodate a wider or flatter cross-section synthetic roundsling; (b) higher side sections for the sheave; and (c) a plurality of stacked bearings along the rigging block axis to provide enhanced lateral stability of the rigging block. In preferred embodiments, the rigging block sheave is manufactured from a synthetic material, such as plastic. The equalizing rigging block exhibits improved characteristics of holding a synthetic roundsling within the rigging block, and of reducing wear and tear on the roundsling.

Abstract: A sheave block includes an internal ring, an external pulley wheel, which turns coaxially on the internal ring, rolling means set between the ring and the pulley wheel, and means of mutual axial retention of the ring and of the pulley wheel. The means of mutual axial retention have mutually facing integral races of the ring and of the pulley wheel in radial-axial contact with the rolling means. The internal ring has at least one angular area of localized increase of the radial distance between the integral races, where there is applied an insert for restoring said radial distance.

Abstract: A pulley seat includes a housing including a cover including a slot on an intermediate portion, and a casing including first and second stepped diameter holes on both sides respectively wherein the housing is integrally formed by hot forging; a pulley including an axial channel; a bearing having an axial hole and being rotatably disposed in the axial channel; a stepped-diameter first sleeve disposed in the first stepped diameter hole; a stepped-diameter second sleeve disposed in the second stepped diameter hole; and a pivot pin rotatably disposed in the first sleeve, the axial hole, and the second sleeve.

Abstract: A block has a sheave (4) mounted for rotation about an axis with first bearing elements (6a, 6b) that transfer both axial and radial loads and second bearing elements (12) that transfer both radial loads, so increasing load capacity.

Abstract: A wireline hay pulley has a support with front and back plates extending therefrom. A sheave disposed between the plates can rotate on an axle. The front plate is affixed to the support, while the back plate is removably connected to the support. The front plate has a round opening in which an eccentric bushing on the axle can rotate. When the back plate is disconnected from the support, the back plate can turn the axle fixed in a slotted opening. An eccentric bushing on the axle rotates in an opening of the front plate, thereby shifting the sheave away from the support. With the back plate moved away and the sheave shifted downward, an operator can readily rig up a wireline in the sheave's slot.

Abstract: A method for installing a casting double bearing in a casting, and a wheel manufactured according to the method are provided. The double bearing includes at least two bearing units that are essentially similar.

Abstract: A block with a rotating sheave mounted between a pair of side plates. Between the side plates may be a post about which a mounting loop may be mounted. The post is configured to permit the loop to be attached or detached from the block.

Abstract: A pulley suspension assembly for assisting a user to vertically transport a cable to an elevated location may include a base member adapted to be positioned at the elevated location. A plurality of prongs may be statically coupled the base, extended upwardly therefrom, and seated adjacent to a rear edge thereof. A rectilinear guide rail may be statically mated to the prongs and spanned therebetween. Additionally, a plurality of stabilizing brackets may be statically affixed to the top surface and front of the base member. Further, a rectilinear shaft may be connected to the brackets and spanned therebetween. A plurality of pulleys may be journaled about the rectilinear shaft and rotatable thereabout. Such pulleys may be uniformly juxtaposed side-by-side and freely reciprocated along the shaft while rotating about the fulcrum axis. Anchor cables may be included and engaged with the prongs and an existing support surface at the elevated location.

Abstract: A block with a rotating sheave mounted between a pair of side plates. Captured between the side plates may be a post about which a mounting loop may be mounted. The post is removable from the between the side plates to permit the loop to be attached or detached from the block.

Abstract: The present invention provides a ratchet block with a block body 10 having a pair of side cheeks 11,12 and a sheave assembly 15 therebetween, which comprises a hub 16 supporting an annular sheave 17 for rotation about a principal axis. The ratchet block also includes a ratchet mechanism comprising ratchet teeth 19 on the sheave and a pawl 20 mounted on the hub 16 or a side cheek 11,12 for movement between an engaged setting, where the ratchet mechanism is active, and a free setting where the ratchet mechanism allows free rotation of the sheave. An actuator 25 is also mounted on the hub 16 or said side cheek 11,12 and linked to the pawl 20 to effect movement thereof between its engaged and free settings. Means are provided for pivoting the hub between loaded and unloaded limiting positions about an axis parallel to but spaced from the hub's principal axis. Spring means 33 are provided for biasing the hub 16 to said unloaded limiting position.

Abstract: The present invention is a sheave assembly that includes a ring supported by a support assembly instead of a solid sheave wheel supported by a central axle. The support assembly may include a plurality of rollers or a curved shoe. The ring is made of a lubricated plastic material or other similar material. The ring includes a groove for retaining the wireline or cable and an inner surface that is designed to mate with the outer surface support assembly.

Abstract: A field adjustable block for use with a bridge crane having a rotating cylindrical drum for rope. The block includes a cylindrical center pin having a key way recess parallel to an axis of the center pin. An inner side plate has an opening therethrough and an extending key receivable in the key way recess to prevent rotation of the inner side plate. Multiple sheaves are receivable over the center pin. At least one toroidal spacer is receivable over the center pin. A lock washer has an inwardly extending key receivable in the key way recess of the center pin and has a plurality of radially extending tabs. A nut has at least one notch to receive one of the extending tabs therein. An outer side plate is removably attached to the inner side plate by fasteners.

Abstract: A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

Abstract: A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

Abstract: A rope pulley construction comprising a frame, at least one rope pulley equipped with a rope groove, rope pulley bearing, guard to prevent a lifting rope from coming off the rope pulley, and suspension point for hanging the rope pulley. The frame of the rope pulley construction comprises two plate parts joined together which simultaneously provide suspension for the rope pulley, at least one suspension point for hanging the rope pulley construction and guard to prevent a lifting rope from coming off the rope pulley.

Abstract: A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

Abstract: A lightning resistant hydrological pulley comprising an insulator between a pulley body and an axle insert. The insulator is made of electrically non-conductive material, thereby denying lightning surges an electrical path from the pulley body to an axle disposed within the axle insert. Set screws angularly immobilize the pulley body relative to the insulator, and the insulator relative to the axle insert and relative to an axle disposed within the axle insert. In the preferred embodiment, the insulator is made of synthetic material such as white Delrin, and the pulley body and the axle insert are made of brass.

Abstract: A pressure containing wireline sheave mechanism having a sheave body defining an opening within which is received a sheave housing which cooperates with the sheave body to define a circular internal sheave chamber which is exposed to operating pressure such as well pressure during well servicing activities. A split sheave having an external wireline groove is located within the internal chamber and is rotatably supported at its inner periphery by bearings. During operation of the wireline sheave mechanism lubricant is supplied to the inner periphery of the internal sheave chamber at a location adjacent the bearing and at a lubricant pressure exceeding well pressure to prevent well pressure induced migration of contaminants from the wireline groove of the sheave to its bearings.

Abstract: A dragline comprising a main housing, a bucket hoist mechanism mounted on the housing, a bucket drag mechanism mounted on the main housing, a moving mechanism for moving the main housing over the ground, a boom which is supported on the main housing and which has an upper end, a bucket, a hoist rope having one end connected to the bucket hoist mechanism, extending over the sheave, and having an opposite end, a drag rope extending between the bucket and the bucket drag mechanism, a dump block including a frame having a main portion connected to the opposite end of the hoist rope, and a cantilevered spindle extending from the main portion, and a dump block sheave mounted on the spindle for rotation about a sheave axis, and a dump rope extending over the dump block sheave and having one end connected to the drag rope and an opposite end connected to the bucket, such that the dump rope can be removed from the sheave in the direction away from the frame main portion.

Abstract: A block for line-handling comprises two cheeks and a rotatable sheave sandwiched between the two cheeks. The two cheeks mate together through a central aperture of the sheave by a relative rotation of the cheeks via a bayonet fitting. The mated cheeks are secured to each other by fixing pins, which also secure a swivel attachment member to the block. Bearing elements are used for rotatably supporting the sheave to prevent its translational movement relative to the cheeks.

Abstract: A bearing block has a central hub with a pair of circular grooves near the sides of the hub. The grooves define an inner ball race and also define an outer ball bearing retaining lip. A ring-shaped sheave is disposed around the hub and has a pair of recesses in the sides, which define an outer bearing race and a thrust bearing race. Ball bearings are snap fitted into the races over the lips, such as that the bearings are self-contained in the assembly.

Abstract: A bucket dump block, used on dragline buckets, has side frames and a rotatable rope-guiding sheave. In the improvement, each side frame has a separate ring-like support section extending toward the other side frame and abutting the support section of such other side frame. The sheave is supported by and rotates about such support sections. The sheave rides on an annular anti-friction member retained on a sleeve into which the support sections are press-fitted. The dump block (which is devoid of provisions for lubrication) has a minimum number of parts and is easy to manufacture and repair.

Abstract: The present dump block (100) comprises an internal plate (106) attached to an external plate (108) with a rotatably mounted sheave (110) therebetween. The external plate (108) presents a smooth convex surface. Bearings (126) are mounted between the sheave (110) and a centrally located shaft (122). The position of the bearings (126) is maintained by a bearing side plate (116) A side plate bearing cushion (124) is located between the bearing side plate (116) and the bearings (126). The bearing cushion (124) absorbs the force of any impacts experienced by the dump block (100). Likewise, the convex surface of the external plate (108) turns any impact into a glancing blow, thereby extending the life of the dump block (100).

Abstract: A bearing block having an inner and outer race is provided with an enlarged axial opening through the unloaded portion of the inner race and is selectively reinforced in the region carrying the load, in order to provide an improved strength to weight ratio.

Abstract: A high strength, low friction, corrosion free block for marine environments includes a fixed or swivel head, shackle and a ground and polished axle all composed of 17-4 ph stainless steel sandwiched between titanium/titanium alloy side cheeks. One or more aluminum sheaves each having a filament wound epoxy glass radial bushing with a Teflon liner are journaled around the axle. Oven cured Teflon filled thrust washers bonded to the sides of the sheave(s) turn against polished inner surfaces of the side cheeks. The blocks may include titanium/titanium alloy straps exterior the side cheeks supporting the axle to provide increased functional load bearing capacities ranging up to and exceeding 50,000 lbs.

Abstract: A low profile fairlead has a plurality of blocks support in a spaced relation along the arc of a circle to simulate a single bearing block of larger diameter.

Abstract: A device is disclosed for attaching a ski rope to the pylon of a towing boat for preventing chatter and wear on the front end of the rope. The device includes a vertically extending support pin which is mounted on the upper end of the pylon. A cylindrical swivel head is mounted by means of an anti-friction bearing on the support pin for rotation about a vertical axis. The swivel head is formed with an annular groove which is intermediate upper and lower shoulders that are sized to retain a loop on the front end of the rope onto the swivel head during towing. The rope loop freely turns with the swivel head as the rope angularly displaces relative to the boat during towing.

Abstract: A dump block is provided for a dragline bucket wherein a central cylinder is equipped with axially spaced side plates to provide a reeve-way for the dump rope, and a steel ring rotatably disposed about the cylinder having inner and outer plastic elements with the cylinder providing an oil reservoir for lubricating the inner plastic elements.

Abstract: A main rope is wound round a sheave and a deflector wheel by three turns, and the sectional shape of those rope grooves of the sheave with which the main rope is held in engagement is formed in the shape of circular arcs, whereby the lifetimes of the main rope and the sheave are lengthened, and an enhanced traction ability is attained. Among the grooves of the driving sheave around which the main rope is wound, those except the grooves around which the main rope is wound first and last are shaped so as to afford greater friction at contact therebetween than the frictional contact of the first and last grooves, or the grooves around which the main rope is wound first and last are rendered higher in hardness than the other grooves, whereby the amounts of wear of the respective grooves are equalized to extend the lifetimes of the rope and the sheave and to prevent the pleasant ride of an elevator from worsening.

Abstract: A supporting device which supports an arm roller to an arm cam at a spinning reel, the arm roller being supported rotatably to the arm cam in relation of being subjected to a load acting on the arm roller slantwise with respect to the axis of rotation thereof.

Abstract: A guide is disclosed herein through which a fishing line is trained which includes a U-shaped frame or yoke movably supporting a spool roller on ball bearing assemblies between sideplates which is provided with a reduced central portion for movably conducting and guiding the fishing line thereover. The spool roller includes end flanges which are inset into end caps while the ball bearing assemblies are carried on opposite ends of the spool roller. A mounting shaft extends through the spool roller and the end caps detachably mount the spool roller and bearing assemblies to the yoke sideplates via a threaded engagement with the shaft. Detachable mounting members retain the yoke onto the fishing pole via a plurality of thread windings wrapped therearound.

Abstract: A hoist for lifting appliances, and more specifically a block-and-pulley arrangement, or a block-and-tackle arrangement. A plurality of pulleys is arranged between two pulley-housing parts. Each of said plurality of pulleys is supported by its own relatively short shaft. Half of the pulley-supporting shafts is supported in the upper pulley-housing part, and the other half of the pulleys is supported by partitions in the lower pulley-housing part. Pairs of partitions in the upper pulley-housing part and pairs of partitions in the lower pulley-housing part are interleaving or out of registry. The load-supporting hook has a shaft which projects vertically through both pulley-housing parts by a bearing, so that it is rotatable relative to the upper pulley-housing part. A load supporting cross-member is arranged in transverse relation to the hook-bearing shaft and the latter projects through its center.

Abstract: A seal assembly and a sheave block utilizing said assembly in which a housing (H) mounts a central shaft (12) on which a plurality of sheaves (40-43) are rotatably mounted. A free-floating spacer ring (60) is positioned on the central shaft between each of the sheaves and between a sheave and the housing and has a hard wearing smooth surface as provided by chrome-plating, and a pair of lip seals (62,63) of elastic material are positionable, one on each face of a sheave and an adjacent surface of the housing, with each having a part (64,65) thereof defining a hard wearing low friction bearing surface for sealing engagement with the surface of the spacer ring.