Back to results
US 3,945,503 AGranted
Crane with a variable center rope suspension system
AssigneeFruehauf Corporation
InventorGeorge W. Cooper
Life of this patent
Estimating the term…
Abstract
A variable centers rope suspension system for a gantry crane including a pair of trolleys mounted on the crane and interconnected by a frame which reciprocates the trolleys with respect to each other. The trolleys are moved synchronously along the gantry through the drive cables being connected to the frame.
Claims3
A variable centers rope suspension system for suspending a load from an overhead traveling crane comprising,
- a crane structure,
- a gantry supported by said crane structure,
- a pair of rails mounted on said gantry,
- a pair of trolleys mounted and adapted to roll on said rails and supported by said gantry,
- a frame interconnecting said trolleys and having slidable connections therewith,
- means for translating said load by moving said trolleys and interconnecting frame as a unit along said gantry on said rails,
- means mounted on said frame for reciprocating said trolleys with respect to said frame whereby said trolleys can be synchroneously moved on said rails with respect to the centerline of the load a selected distance toward or away from each other within the limits of the frame and whereby the reciprocation of the trolleys on the rails with respect to the frame is independent of the translational movement of the load achieved by moving the trolleys and interconnecting frame as a unit, and
- a fleet through reeving system comprising,
- a load engaging means having at least two sheaves mounted thereon,
- at least one hoisting drum mounted on said crane structure removed from said trolleys,
- at least one pair of sheaves mounted on each of said trolleys,
- at least one pair of ropes reeved from said hoisting drum,
- one of said pair of ropes being reeved from said hoisting drum through one of said pair of sheaves mounted on one of said trolleys, down through one of said pair of sheaves mounted on said load engaging mean, up through the other of said pair of sheaves mounted on said trolley, and then to the outboard end of said gantry opposite said hoisting drum where it is deadended, and
- the other of said pair of ropes being reeved from said hoisting drum through one of said pair of sheaves mounted on the other of said trolleys, down through the other of said pair of sheaves mounted on said load engaging means, up through the other of said pair of sheaves mounted on said other trolley, and then to the outboard end of said gantry opposite said hoisting means where it is deadended.
11 more elements
Dependencies are inferred from the claim text.