Combi Wear Parts Ab

Vosta Lmg B.v.

Dredging International N.v.

Klaas Geert Wijma

Per Quarfordt

Adnan Gabela

Cornelis Wempe

Paull Baghramian

Stefan S Ederyd

Stijn Claessens

A wearing-part holder includes a first stop surface, which is arranged on the front portion of the wearing-part holder, a first contact surface and a second contact surface symmetrically arranged from a centre line L-L from the first stop surface of the wearing-part holder to a second stop surface and a third stop surface, where the second stop surface and the third stop surface are symmetrically arranged on each side of the centre line L-L from the first contact surface and the second contact surface to a third contact surface and a fourth contact surface, where the third contact surface and the fourth contact surface are symmetrically arranged on each side of the centre line L-L from the second stop surface and the third stop surface. A wearing part and a wearing-part system are also provided.

Wearing-part system

A cutter head that comprises at least one blade and at least one adapter chamber arranged in the blade for assembly of a tool holder in the blade, in which the adapter chamber is a cavity located in the blade and having an opening and an assembly recess. Also a blade for a cutter head, as well as a tool holder for assembly on a cutter head for a dredger is included. Moreover, included is a tool arrangement for a dredger. Included also are a method for assembly of a tool holder in a cutter head for a dredger and a production method for a blade for a cutter head for a dredger.

Tool and tool holder for a dredger

The invention relates to a cutter head () for dredging ground under water, this cutter head being suitable for attachment rotatably around a central axis to the ladder () of a cutter suction dredger () and for being moved through the ground () therewith in a lateral sweeping movement, the cutter head comprising a base ring (), a hub () situated at a distance in the direction of the central axis from the base ring, and a plurality of arms () extending from the base ring to the hub, wherein a passage opening () is located between arms and wherein the arms are provided with a first series of cutting tools on a leading part () relative to the direction of rotation of the cutter head, and wherein at least one arm is provided with a second series of cutting tools on a part of the arm () facing away from the central axis.

Cutter head for dredging ground and use of this cutter head for dredging ground

A tooth system for a tool for earth moving machinery that includes a holder located on the tool and a front tooth portion that is detachably arranged on and in relation to the holder, which tooth portion is in the form of a replaceable wear/replacement part with a rear leg and the holder embodies a cavity designed to receive the leg of the tooth portion. This achieves a unified joint for assimilation of occurring loads via a predetermined connection geometry embodying special, opposite, mutually interacting contact surfaces and clearance surfaces arranged along the tooth portion and holder. The joint includes a multi-armed, preferably cruciform, cross section comprising at least four projection arms and at least four grooves each that interact with each projecting arm. Each projection arms includes a vertically arranged, upper arm, lower heel and two, essentially horizontally and laterally arranged, wing portions, with a tensioning device.

Tooth system

Self-sharpening wearing part having improved abrasion resistance and strength, which wearing part comprises at least a first and a second material part. The first material part is constituted by a casting body and the second material part is comprised of at least one elongated hard metal rod which is fixed in the first material part. The wearing part produces an auto-signal when the part must be changed due to wear.

Self-sharpening, auto-signalling wearing part

A cutter head for a cutter suction dredger to be mounted rotatably about a cutter head center axis with respect to a suction device for sucking up material cut loose by the cutter head from the bottom of a body of water, which cutter head includes a base ring, a boss spaced from the base ring in the direction of the center axis, and a plurality of arms which extend from the base ring to the boss and are distributed at regular intervals in the peripheral direction, each arm has a series of teeth located on the radially outermost parts of the arm and directed outwards at an angle with respect to the peripheral direction, the direction of rotation of the cutter head being set such that the teeth perform a cutting movement, with non-return mechanisms, preventing movement of cut material from the center axis to the exterior.

Cutter head and suction dredger

A tooth system () for a tool () for earth moving machinery () is disclosed, which tooth system is of the type embodying a holder () located on the tool and a front tooth portion () that is detachably arranged on and in relation to the holder, which tooth portion is in the form of a replaceable wear and/or replacement part designed for the actual earth moving (W) and embodies a rear leg and the holder embodies a cavity () designed to receive the leg in interaction with the tooth portion and thereby achieve a unified joint (A, B, C, D) for assimilation of occurring loads (Fs, Fc, Fp) via a predetermined connection geometry embodying special, opposite, mutually interacting contact surfaces () and, at least initially, clearance surfaces () that are arranged along the tooth portion and holder. Thus, in accordance with the present invention one has achieved an improved tooth system distinguished by the tooth leg and holder cavity, along at least a front part of said joint (A, B, C, D), to have a multi-armed, preferably cruciform, cross section comprising at least four projection arms () and at least four grooves () each that interact with each projecting arm, respectively, which projection arms comprise an, essentially, vertically arranged, upper arm (), an, essentially vertically arranged, lower heel () and two, essentially horizontally and laterally arranged, wing portions (), wherein a tensioning device () is arranged in the rear part () of the cavity in order to achieve adjustable tensioning that tightens the tooth portion in relation to the holder, essentially axially along the axial symmetry axis Y of the cavity.

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Haarlem, Netherlands

Klaas Geert Wijma