Spreader list, trim and skew adjustment means

Claim 2

In a crane reeving system, a list, trim, and skew adjustment means comprising at least one trolley supporting a load lifting spreader by at least three wire ropes driven by at least three wire rope drums, said spreader being defined by two ends and two sides, a first of said wire ropes being reeved from a first of said wire rope drums outboard along the gantry of the crane and around a first set of sheaves disposed at the first ends of the trolley and spreader and then further outboard and secured to a first Jactuator, a second of said wire ropes being reeved from said first wire rope drum outboard along the gantry and around a second set of sheaves disposed at the first ends of the trolley and spreader and then further outboard and secured to a second Jactuator, a third of said wire ropes being reeved from a second of said wire rope drums outboard along the gantry and around a third set of sheaves disposed at one of the removed edges of said trolley and spreader and then further outboard and secured to a third Jactuator, a fourth rope reeved from said second drum, and corresponding to said third rope, said rope being reeved through a fourth set of sheaves disposed at the other of the removed edges of said trolley and spreader and secured to the third Jactuator, fifth and sixth ropes reeved from a third drum, and corresponding to said first and second ropes, for supporting the second end of said spreader, said ropes being reeved through a fifth and sixth set of sheaves and secured to the second and first Jactuators respectively, and means for independent remote operation of said Jactuators to adjust the list, trim, and skew of said spreader.

Claim 3

The adjustment means of claim 1 wherein said trolley comprises separable sections reciprocable towards and away from each other and said first, third, and sixth sets of sheaves are disposed on the first trolley and the second, fourth, and fifth sets of sheaves are disposed on the second trolley.

Claim 4

The adjustment means of claim 1 wherein said first, second, fifth, and sixth sets of sheaves each include a pair of sheaves disposed on the ends of the trolley and a sheave disposed adjacent to the ends of the spreader, the two sheaves at each end of the spreader forming a pair of sheaves, and the third and fourth sets of sheaves each including a pair of sheaves disposed at the removed opposite edges of said trolley and a sheave disposed at one of the opposite edges of said spreader.

Claim 5

In a crane reeving system for handling cargo containers and having a pair of trolleys mounted on the crane gantry for supporting a lifting spreader headblock and being reciprocable with respect to each other, said spreader headblocks being defined by two ends and two sides, a list, trim, and skew adjustment means comprising a first wire rope being reeved outboard from a first wire rope drum and over a first sheave of a first pair of sheaves disposed at a first end of the first of the two trolleys, down around a first sheave of a pair of sheaves disposed at a corresponding first end of a lifting spreader headblock, back up over the second sheave of the first pair of sheaves, and then further outboard and secured to a first Jactuator, a second wire rope being reeved outboard from a first wire rope drum and over a first sheave of a second pair of sheaves disposed at the corresponding first end of the second of the two trolleys, down around the second sheave of the pair of sheaves disposed at the first end of the headblock, back up over the second sheave of the second pair of sheaves, and then further outboard and secured to a second Jactuator, a third wire rope being reeved outboard from a second drum and over a first sheave of a third pair of sheaves disposed at the removed edge of the first trolley, down around a sheave disposeD at the corresponding edge of the headblock, back up over the second sheave of the third pair of sheaves, and then further outboard and secured to a third Jactuator, a fourth rope reeved from said second drum and corresponding to said third rope, said fourth rope being reeved through a fourth pair of sheaves disposed at the removed edge of the second trolley and a sheave disposed at the corresponding edge of the headblock opposite the edge containing the sheave the third rope is reeved through, and said fourth rope being secured to said third Jactuator, fifth and sixth ropes reeved from a third drum and corresponding to said first and second ropes for supporting the second end of said headblock, said fifth and sixth ropes being reeved through fifth and sixth pairs of sheaves disposed on the second ends of said second and first trolleys and a pair of sheaves disposed at the second end of said headblock and being secured to said second and first Jactuators respectively, and motor means remotely and independently controllable for actuating said Jactuators to adjust the list, trim, and skew of said headblock.

Claim 6

In a crane reeving system for handling cargo containers and having a pair of trolleys mounted on the crane gantry for supporting a lifting spreader headblock and being reciprocable with respect to each other, said spreader headblocks being defined by two ends and two sides, a list, trim, and skew adjustment means comprising a first wire rope being reeved outboard from a first wire rope drum and over a first sheave of a first pair of sheaves disposed at a first end of the first of the two trolleys, down around a first sheave of a pair of sheaves disposed at a corresponding first end of a lifting spreader headblock, back up over the second sheave of the first pair of sheaves, and then further outboard and secured to a first Jactuator, a second wire rope being reeved outboard from a first wire rope drum and over a first sheave of a second pair of sheaves disposed at the corresponding first end of the second of the two trolleys, down around the second sheave of the pair of sheaves disposed at the first end of the headblock, back up over the second sheave of the second pair of sheaves, and then further outboard and secured to a second Jactuator, a third wire rope being reeved outboard from a second drum and over a first sheave of a third pair of sheaves disposed at the removed edge of the first trolley, down around a sheave disposeD at the corresponding edge of the headblock, back up over the second sheave of the third pair of sheaves, and then further outboard and secured to a third Jactuator, a fourth rope reeved from said second drum and corresponding to said third rope, said fourth rope being reeved through a fourth pair of sheaves disposed at the removed edge of the second trolley and a sheave disposed at the corresponding edge of the headblock opposite the edge containing the sheave the third rope is reeved through, and said fourth rope being secured to said third Jactuator, fifth and sixth ropes reeved from a third drum and corresponding to said first and second ropes for supporting the second end of said headblock, said fifth and sixth ropes being reeved through fifth and sixth pairs of sheaves disposed on the second ends of said second and first trolleys and a pair of sheaves disposed at the second end of said headblock and being secured to said second and first Jactuators respectively, and motor means remotely and independently controllable for actuating said Jactuators to adjust the list, trim, and skew of said headblock.