Patents Assigned to Steinhaus GmbH
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Patent number: 4960510Abstract: A screening apparatus has a screen grid including plurality of exchangeable elements, each having a screen surface with sieve openings. The screen elements are placed in direct contact with each other to form a continuous screen, sifting surface and are removably connected through separators on intermediate cross-pieces. The separators are connected to the bottoms of the screen elements and extend at such a distance beyond the underside of screen surface so as to form an inwardly facing open passage space for sifted material below the screen, sifting surface in the area of connection of the screen elements to the separators such that the active sifting surface extends to the area of the supported marginal zones.Type: GrantFiled: June 13, 1988Date of Patent: October 2, 1990Assignee: Steinhaus GmbHInventor: Kurt Wolff
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Patent number: 4885040Abstract: The invention concerns a procedure for manufacturing a screen-in-lay for systematic-screen fields with square or rectangular frame elements which can be attached to a substructure, on which a correspondingly square or rectangular screen-mat made of a rubber-elastic material, with perforated areas is attached in such a way as to be removable. The screen-mat has boshable, continuous ribs, which can be boshed into corresponding recessions at the upper sides of the flanges of the frame elements. The manufacturing expense for such a screen in-lay is to be reduced by having a section of a flat material cut off for the manufacture of the screen mat, such that only minimal work must still be undertaken on such a section in order to obtain a completed screen mat.Type: GrantFiled: May 20, 1988Date of Patent: December 5, 1989Assignee: Steinhaus GmbHInventor: Kurt Wolff
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Patent number: 4752512Abstract: The subject matter of the application is based on a process for the manufacture of screen components of various lengths for system screening decks, the screen components having substantially the form of a plate or at least a frame with longitudinal and transverse members. The screen components consist of a weldable plastic and are subdivided into short components with a square and/or rectangular basic shape and into long components two or three times the length of this basic shape. The screen components have in each case, on supporting members arranged on both longitudinal sides, fastening elements, which project from the undersides, or edge fastening recesses spaced in a certain pitch independently of their lengths. In spite of their various lengths, such screen components are to be manufactured in injection-moulded quality, for which only one injection mould in a single format corresponding to the basic shape is necessary.Type: GrantFiled: December 16, 1986Date of Patent: June 21, 1988Assignee: Steinhaus GmbHInventor: Kurt Wolff
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Patent number: 4674251Abstract: A screen component for use in modular screening decks, comprising a frame-shaped plastics moulding which surrounds one or more fields having screen openings. At least two of the opposite sides of the plastics moulding have supporting members with fastening elements, between which reinforcement rods embedded in the plastics moulding extends. Premoulded plastic inserts are embedded in the supporting members and have insert openings on the sides of the inserts facing each other, into which the ends of the reinforcement rods are inserted.Type: GrantFiled: August 22, 1986Date of Patent: June 23, 1987Assignee: Steinhaus GmbHInventor: Kurt Wolff
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Patent number: 4409099Abstract: Sifters which may comprise a plurality of elastic plates with embedded reinforcements are arranged to be releasably attached at the corners to spacer elements supported on a main frame. Adjoining corners of adjacent sieve plates are supported on a single spacer element. Each corner has a depending stub which is received in an opening in the spacer element. Each sieve element may have a peripheral sealing lip. The cross section of the frame struts is shaped to allow sifted material to fall off.Type: GrantFiled: March 2, 1981Date of Patent: October 11, 1983Assignee: Steinhaus GmbHInventor: Kurt Wolff
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Patent number: 4278535Abstract: Several illustrative embodiments of this invention are shown and described. The screen deck for screening machines is assembled from rectangular screen members, preferably formed from a suitable synthetic material. These screen members abut one another directly to form a continuous screen surface. The screen members have at the edges of their undersides projections which complement one another in pairs along the abutting surfaces on only the longitudinal edges of the members. Longitudinally oriented support struts underneath the screens have aligned holes which engage the projections and thereby sustain the entire screening surface.Type: GrantFiled: June 14, 1979Date of Patent: July 14, 1981Assignee: Firma Steinhaus GmbHInventor: Kurt Wolff
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Patent number: 4141821Abstract: A screening assembly comprising a plurality of screening elements, with each element including at least one hollow tubular protrusion extending through an aperture formed in a supporting grid. The protrusion is formed with a smaller diameter than the aperture and is expanded into clamping contact with the aperture by insertion of a securing pin through the protrusion.Type: GrantFiled: December 1, 1976Date of Patent: February 27, 1979Assignee: Firma Steinhaus GmbHInventor: Kurt Wolff