A bell design crown block for a top mounted compensator includes a removable, tilting sheave block mounted within the outside perimeter of a crown block yoke. An actuator installed in the crown block actuates the tilt function. No hinge adaptor is required and the sheave block does not hang past or below the crown block yoke. When used in a floating platform application, idler sheaves are mounted on the crown block yoke and an optional interface beam may be provided for the active heave cylinder head.

An elevator sheave assembly with independently rotating sheaves includes a shaft having a longitudinal axis and a plurality of sheave subassemblies independently rotatable about the longitudinal axis of the shaft. Each of the plurality of sheave subassemblies includes a sheave having a running surface configured for frictional tractive engagement with a tension member, and at least one bearing rotatably connecting the sheave to the shaft. The elevator sheave assembly further includes a bearing spacer arranged between adjacent sheave subassemblies of the plurality of sheave subassemblies on the shaft to isolate rotation of the adjacent sheave subassemblies relative to one another. Each of the plurality of sheave subassemblies is independently rotatable such that the tension member associated with each of the plurality of sheave subassemblies operates on its own independently rotating sheave.

An elevator sheave assembly with independently rotating sheaves includes a shaft having a longitudinal axis and a plurality of sheave subassemblies independently rotatable about the longitudinal axis of the shaft. Each of the plurality of sheave subassemblies includes a sheave having a running surface configured for frictional tractive engagement with a tension member, and at least one bearing rotatably connecting the sheave to the shaft. The elevator sheave assembly further includes a bearing spacer arranged between adjacent sheave subassemblies of the plurality of sheave subassemblies on the shaft to isolate rotation of the adjacent sheave subassemblies relative to one another. Each of the plurality of sheave subassemblies is independently rotatable such that the tension member associated with each of the plurality of sheave subassemblies operates on its own independently rotating sheave.

A pipe replacement system and cable guide frame are shown. Configurations are shown that include plurality of guide pulleys attached to the cable guide frame to define a curved path between a pipe to be replaced and a cable pulling system. Configurations are shown where a pipe breaking tool is pulled over the plurality of guide pulleys for ease of removal after a replacement operation. Configurations are also shown that include a stationary splitter adjacent to the cable pulling system to prevent jamming of the cable pulling system.

A pipe replacement system and cable guide frame are shown. Configurations are shown that include plurality of guide pulleys attached to the cable guide frame to define a curved path between a pipe to be replaced and a cable pulling system. Configurations are shown where a pipe breaking tool is pulled over the plurality of guide pulleys for ease of removal after a replacement operation. Configurations are also shown that include a stationary splitter adjacent to the cable pulling system to prevent jamming of the cable pulling system.

This is achieved according to the present invention by a torque/power transfer device comprising a main frame, a driving member (2), a driven member (3), and at least two pulley systems. Each pulley system comprises at least one stationary pulley (11a, 11b), which is stationary relative to the main frame, at least one movable pulley, which is movable relative to the main frame, a first wire connected to the driving member (2) and running over the at least one stationary pulley and the at least one movable pulley and a second wire operatively connected to the at least one movable pulley at one end and to the driven member (3) at its other end, wherein the second wire is running via a stationary regulator. The first wire of each pulley system is connected to a common point of the driving member and the second wire of each pulley system is operatively connected to a common eccentric point of the driving member. The regulators and the driven member are arranged relative to each other so that a centre of rotation for the driven member is arranged on an imaginary first line between the regulators of the both pulley systems. The imaginary first line has an angle relative the horizontal plane determined based on the radius of the driven member and a distance between the centre of rotation and respective regulator.

This is achieved according to the present invention by a torque/power transfer device comprising a main frame, a driving member (2), a driven member (3), and at least two pulley systems. Each pulley system comprises at least one stationary pulley (11a, 11b), which is stationary relative to the main frame, at least one movable pulley, which is movable relative to the main frame, a first wire connected to the driving member (2) and running over the at least one stationary pulley and the at least one movable pulley and a second wire operatively connected to the at least one movable pulley at one end and to the driven member (3) at its other end, wherein the second wire is running via a stationary regulator. The first wire of each pulley system is connected to a common point of the driving member and the second wire of each pulley system is operatively connected to a common eccentric point of the driving member. The regulators and the driven member are arranged relative to each other so that a centre of rotation for the driven member is arranged on an imaginary first line between the regulators of the both pulley systems. The imaginary first line has an angle relative the horizontal plane determined based on the radius of the driven member and a distance between the centre of rotation and respective regulator.

Embodiments of the present invention are generally directed to davits for raising, lowering, and transporting loads. In general, davits described herein are portable and are capable of attaching to various mounting locations. The portable davit 100 includes a base mount 102 and an intermediate mount 104 for mounting the portable davit 100 to a mounting location. The base mount 102 and the intermediate mount 104 are couplable to a mast 106 for supporting the portable davit 100 when generally carrying a load L. The portable davit 100 also includes a jib 108 hingedly coupled to the mast 106 through a coupling 118. The jib 108 is configured to rotate about the coupling 118 such that the jib 108 is positionable at a lifting angle 120.

Embodiments of the present invention are generally directed to davits for raising, lowering, and transporting loads. In general, davits described herein are portable and are capable of attaching to various mounting locations. The portable davit 100 includes a base mount 102 and an intermediate mount 104 for mounting the portable davit 100 to a mounting location. The base mount 102 and the intermediate mount 104 are couplable to a mast 106 for supporting the portable davit 100 when generally carrying a load L. The portable davit 100 also includes a jib 108 hingedly coupled to the mast 106 through a coupling 118. The jib 108 is configured to rotate about the coupling 118 such that the jib 108 is positionable at a lifting angle 120.

A system for lifting and lowering a roof of a vehicle. The system includes a lifting device secured to an external structure; a plurality of pulley selectively positioned above the roof of the vehicle, the plurality of pulleys includes a first and second pulley positioned at a rear section of the roof; a third and fourth pulley positioned at a front section of the roof; a fifth and sixth pulley positioned between the first and second pulley and the third and fourth pulley; and a center pulley positioned between the first and sixth pulley and the third and fourth pulley. The system further includes a line secured to the lifting device, the line includes a first section passing through both the first and second pulley for lifting the rear section of the roof; a second section passing through the center pulley and through the fifth and sixth pulley for lifting the front section of the roof. The system further includes a first tension device secured to the first section of the line; a second tension device secured to the second section of the line; a first hook secured to the first section of the line; and a second hook secured to the second section of the line.