Grab
AssigneeNemag, B.V.
InventorLeendert van Huuksloot
Life of this patent
Estimating the term…
Abstract
A grab comprising a pair of buckets interconnected by way of arms capable of pivoting movement relative to each other, and the free ends of which are provided with sheaves for guiding operating or closing ropes by which the buckets can be opened and closed. The rear edges of the buckets are secured by way of ropes or the like to a cross-beam, to which the hoist ropes are connected. According to the invention, the arms are provided at some distance from their free ends with arcuate bridge members or elevations, directed to one another, which roll one over the other as the grab buckets are opened and closed.
Claims5
A grab comprising a pair of buckets interconnected by arms capable of pivoting movement relative to each other, the free ends of said arms are provided with means for guiding operating or closing ropes by which the buckets can be opened and closed, said buckets have rear edges secured by means of hoist ropes or the like to a cross-beam, to which said hoist ropes are connected, characterized in that the arms are provided at some distance from the free ends with arcuate bridge members forming arcuate elevations directed to one another, and as the grab buckets are opened and closed the contact point between said bridge members is displaced as said bridge members and said arcuate elevations roll one over the other.
Dependencies are inferred from the claim text.