Class 37/333 - Draghead dredger (e.g., dustpan dredger)

Subclass of Class 37 - Excavating
Definition: Apparatus wherein the mouth of the suction pipe comprises
No. of patents: 19
Last issue date: 10/23/2007

Number	Title	Issue Date
7284345	Milling device for floors, rock, excavated material or other material The milling apparatus (1) has a bucket with a receiving chamber and has a milling unit with a milling rotor (14). The receiving chamber has a receiving opening (4) and is embodied as a bucket (2). On the bottom of the bucket (2), a...	10/23/2007
7089693	Dredging method and apparatus An improved hydraulic dredging apparatus for removing a sediment layer from an underlying substrate lying below a water surface includes a receptacle having an open-front portion through which is sediment is collected, means for attaching the dredging apparatus to t...	08/15/2006
5970635	Jet agitation dredging system A dredging system for removing material from a submerged ground surface includes a dredge head housing having an enclosed, pressurized agitation chamber into which the material to be removed is received from an intake opening. Connected to the housing is ...	10/26/1999
5732487	Dredge head for dredging sludge by a trailing or pushing motion A dredge head for dredging sludge by a trailing and pushing motion thereby defining a trailing and pushing direction is configured to be fitted on a ladder of a stationary dredger. The ladder is movable in the trailing and pushing direction for moving the...	03/31/1998
5603171	Process and apparatus for suctioning off the solid material from waterbeds A process for suctioning solid material from a waterbed and for conveying a resulting solids-water suspension into a hopper is provided. A flow of water is supplied to a towed suction basket. The basket has a suction region connected to a suction tube, at...	02/18/1997
4839061	Method and apparatus for treatment of hazardous material spills Spills of hazardous materials are treated at the site of the spill using an integrated spill responder system which enables personnel to remain at a safe distance from the spill. The mobile, fully self-contained system is dispatched to the spill site and ...	06/13/1989
4471540	Apparatus for positioning a drag nozzle carried by a suction tube Apparatus for positioning a drag head or suction nozzle carried by a suction tube comprises a least one roller coupled with the nozzle. The roller is rotatable about a horizontal roller shaft and pivotable about a vertical axis in a controlled manner rela...	09/18/1984
4437244	Method for sucking up soil or sludge by means of a suction hopper dredge as well as a suction dredge for applying the method A method for sucking up soil or sludge by means of a suction dredge provided with a suction pipe having a drag head. Through the suction pipe (1) water and soil or sludge are sucked up. The soil or the sludge is loosened in front of the inlet opening of t...	03/20/1984
4400895	Drag head for a hopper suction dredge Drag head for a hopper suction dredge, which drag head has a suction opening in the dragging direction, defined by side walls and a rear wall. The lower edges of these walls are positioned in one plane whereby the rear edge is positioned lower then the up...	08/30/1983
4352251	Hand operated suction dredge head and hydraulic submersible pump assembly A portable and lightweight suction dredge head which is held by a diver and is hand operated so as to be easily moved about in the working position. These heads are, for example of sizes from three inches to eight inches in intake diameter. The dredge hea...	10/05/1982
4344239	Dragging type head for a suction dredger The invention relates to a dragging type head (1) of a suction dredger, the head having a driven cutting device in front of the suction tube mouth, which cutting device (5) rotates about a horizontal transverse axis and has cutting blades at its outer cir...	08/17/1982
4319414	Dredgehead having forward water-deflecting means comprising two transverse elements Apparatus to direct the flow of water passing towards and alongside of a dredgehead (of the type, for example, utilized to obtain valuable mineral ores from the ocean depths) in a downwardly direction, so as to utilize the force of the water to assist the...	03/16/1982
4265035	Drag-head for a suction dredger with a pivotable sight A drag head for a suction dredger having side blocks, which rest on unstirred soil, a pivotable sight, and a heel plate situated in front of the sight, the hinge for the sight being located at the lower edge of the sight....	05/05/1981
4261117	Dredging vessel A dredging vessel, specifically intended for the dredging of rivers or similar water courses, equipped with propulsion means allowing the vessel to move independently through the water; an adjustable suction line, with suction head, connected to the sucti...	04/14/1981
4259795	Dragging type cutter head for a suction dredger A dragging type cutter head for a suction dredger has a cutting member that rotates about a horizontal axis and has at its periphery a series of cutting teeth disposed side-by-side in the axial direction. At the lowermost point in their rotation, the cutt...	04/07/1981
4255882	Dragging type cutter head for a suction dredger A dragging type suction head for a suction dredger having a suction tube which extends downwardly and rearwardly from a vessel at the lower end of which the suction head is mounted. In this suction head, enclosed by a housing which at least at a rear side...	03/17/1981
4150502	Method and apparatus for breaking up lumps of stone from a subaqueous soil When breaking up lumps of stone from a subaqueous stony ground, the lumps are loosened by means of at least one chisel inserted into the ground and being moved along the ground surface. In order to break up lumps of stone by low power and to main a predet...	04/24/1979
4083134	Suction head for dredgers A trailing dredger comprises a vessel, a pump, a suction pipe connected with said pump and a suction head connected with said suction pipe and having a suction chamber having at least one suction opening and communicating with the suction pipe, said sucti...	04/11/1978
4083132	Draghead for suction dredger Method and a draghead to be used therein for sucking a slurry of earth and transport water by means of a trailing suction dredger, the draghead including at least one cutter for loosening the earth and water guiding means being provided to guide the trans...	04/11/1978

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Class 37/333 - Draghead dredger (e.g., dustpan dredger)