Abstract: A waste material separating apparatus and method which comprises a frame and a vibratory screening deck or tier within the frame, the screening deck having a plurality of generally parallel, straight rod elements to act as bludgeons on the waste material. The rod elements are removably extended from a transverse rail. Waste material to be separated into a coarse material and a finer material is discharged onto the rod element. The separating apparatus has an eccentric rotating shaft secured to the deck to impart vibratory motion to the rod elements so that the free ends of the vibratory fingers vibrate in a generally vertical direction, and bludgeon and break up the compacted solid waste landfill material. The solid material is progressively moved from the tall to short end of the frame by forward rotary motion of the rotary shaft and falls off the ends of the vibratory rod elements onto the lower tiers to decompact and break up and tumble the waste material.

Abstract: Each stackable screen module arrangement includes a first elongated side wall and a second elongated side wall, the side walls being spaced from each other by a plurality of cross members which extend between the side walls. The cross members also serve to support a screen. Connecting plates connect a lower one of the arrangements to an upper one of the arrangements when the arrangements are stacked to form an assembly. Each plate is connected to the top edge of a side wall of a lower arrangement and the bottom edge of a side wall of an adjacent upper arrangement. Aligned cut-outs are provided in the side walls of the lowermost arrangement and aligned cut-outs are also provided in the side walls of the second lowermost arrangement, and the two sets of cut-outs are aligned with each other to receive, support and surround the vibrator.

Abstract: An aggregate screen repair/screen modification kit including at least one screen patch member. The screen patch member is formed from a rigid mesh material that requires a hand tool to effect a repair, or modification task, and that also conforms to specified mesh material strength requirements of a damaged aggregate screen, or of a functional screen section that needs to be modified. The shape of the screen is the same as the damaged screen area, or the modification area on the screen section to be modified. The screen patch member is provided with a plurality of first engagement members and a plurality of oppositely disposed second engagement members.

Abstract: A circular vibratory screen separator having a separator housing resiliently mounted to a base. A vibratory generator is mounted to the housing for vibratory screen separation. Semicircular slots are cut through the sidewall of the housing normal to the axial centerline thereof. An inflatable seal is positioned about the inner periphery of the separator just below the slot. A stop is located just above the slot such that tension screens may be positioned through the slot into position between an inflatable seal and a stop. Strap ties extend across these slots and are fixed to the wall of the housing such that they are in tension when the inflatable seals are inflated.

Abstract: A circular vibratory screen separator having a separator housing resiliently mounted to a base. A vibratory generator is mounted to the housing for vibratory screen separation. Semicircular slots are cut through the sidewall of the housing normal to the axial centerline thereof. An inflatable seal is positioned about the inner periphery of the separator just below the slot. A stop is located just above the slot such that tension screens may be positioned through the slot into position between an inflatable seal and a stop. Strap ties extend across these slots and are fixed to the wall of the housing such that they are in tension when the inflatable seals are inflated.

Abstract: A vibratory screen for a vibratory screening machine consisting of a plate having a plurality of spaced openings therein, a coarse screen located in contiguous relationship to the plate, a fine screen on top of the coarse screen, a finer screen on top of the fine screen, and a topmost screen which is less fine than the finer screen and epoxy binding all of the foregoing screens to the plate at the borders of the openings. A vibratory screening machine having a tank for receiving a liquid-solid mixture, a plurality of screens of the foregoing type mounted to produce a sealed partition in the tank, an inlet conduit for supplying a liquid-solid mixture to the screens at a rate to maintain a head of the liquid-solid mixture above the screens, a vibratory motor attached to the tank to vibrate the tank, an outlet in the tank below the screens, and a liquid trap located at the outlet to thereby prevent air from entering the chamber in the tank below the screens and to draw a slight vacuum in the chamber.

Abstract: A material separating apparatus and method which comprises a frame of a pair of spaced apart generally downwardly sloping, upper and lower vibratory screening decks within the frame, the upper screening deck comprising a plurality of comb-like elements, which are generally parallel, straight finger elements removably extending from a transverse bracket support and onto which finger elements a feed material is discharged to be separated into a coarse material and a finer material. A lower deck comprises a plurality of comb-like elements having a plurality of transverse cross members and a plurality of downwardly extending, small diameter finger elements extending therefrom, the finger elements being of greater plurality and of smaller diameter than the finger elements of the upper screening assembly, and downwardly angled so as to provide for the separating and sizing of feed material falling from the upper screening deck onto the lower screening deck.

Abstract: A vertical set of sieves receives the particulate material from a vibrating trough conveyor above the set and is vibrated by an agitator on the machine frame. The sieves are spread apart and then tilted to dump the collected particles into respective funnels. The set can then be swung back and contracted for the the next stage. The funnels are connected to collectors which are automatically weighted.

Abstract: A mounting system for removably attaching elongated screen rails to upright side panels of a screen deck for screening crushed rock and gravel. A method for suspending a screen rail within the screen deck is disclosed which avoids the need to remove the screen rails when changing screens. In one embodiment, a plurality of anchors are secured to one side of each screen rail, and bolts are used to secure the rails to the side panels. The anchors each include an opening which is larger at the top than at the bottom to allow the head of the bolt to be readily and easily captured by the anchor. The mounting system is much easier to use and much more rapid than previous systems.

Abstract: A portable screen with a raising and levelling system for raising a frame of the system containing a vibrating screen away from ground on which the system is positioned and for levelling the frame and vibrating screen for improved operation. A wheel assembly rigidly fixed relative to the frame extends from the frame at a first end wall where a first raising and levelling assembly is provided. At an opposite end wall of the frame, a second raising and levelling system is provided. First and second shedding roofs are respectively positioned over the wheel assembly and first and second hydraulic raising and levelling assemblies. With the portable screen having a raising and levelling system as disclosed, the system may be operated on sloping ground and/or ground having undulations and other protrubances.

Abstract: An improved tensioning assembly for vibratory screens includes a rigid frame, at least one classifying screen in the frame, an anchor for anchoring one end of the screen, and a rotatable tensioning assembly at the other end of the screen for both anchoring the other end of the screen and tensioning the screen by rotation of the rotatable assembly. The anchor at the one end of the screen includes a plurality of threaded adjustment members spaced along the length of the anchor for flexing the anchor to selectively and incrementally further adjust the tension on the screen to compensate for tension variations across the width of the screen due to torque differentials in the rotatable tensioning assembly.

Abstract: The invention provides for a screening panel of a synthetic plastics material which has a screening surface and plug socket connections adapted to secure the panel releasably in a side-by-side relationship with similar panels. The panel includes a spacer element along one peripheral edge of the panel and extending in a direction transverse to the screening surface of the panel and being integral and unitary with the panel so that in side view the panel is substanitally L-shaped. The spacer element is adapted to space the screening surface of the panel from a second screening surface substantially parallel to the screening surface of the panel to thereby form a double screen deck supported on the same support frame.

Abstract: A tray classifier in which the trays are locked together easily, and stay locked together while being shaken, but are movable with respect to each other if the trays came in contact with an object. The trays have upper and lower locking surfaces which nest with the locking surfaces of the stack locking member of an adjacent upper or lower tray.

Abstract: The frame member for pressurized screening device includes an inflatable tube disposed along and outwardly of the peripheral wall of the frame. A screen is stretched over an opening in the frame and extends above the peripheral wall and the inflatable tube so that the inflatable tube can be brought into contact with the screen to impart tension to the screen. The inflatable tube is only inflatable in a direction transverse to the direction of the stretching of the screen and in such a manner as not to touch the holder member. A holder member is removably mounted on the screen attaching portion of the frame to sandwich the screen between the upper surface of the screen attaching portion and the lower surface of the holder member.

Abstract: A horizontal vibrating multi-deck screen apparatus for separating different sizes of materials of generally the same type. The apparatus includes a first or upper screening basket and a second or lower screening basket. The upper screening basket has a feed chute at one end and a discharge chute at the opposite end. Each screening basket has at least one screen deck thereon for conveying and screening material. The two baskets are connected by a spring-type coupling system, including coil springs and fiberglass leaf springs. The two baskets together are supported by known types of support spring systems installed between the upper basket only and a base frame. Hence each basket constitutes one mass and each spring system one spring of a two-mass two-spring system. A pair of shaker motors mounted directly, one on each side, on the lower basket inputs a straight-line sinusoidal exciting force to the system. The exciting force and the spring forces are transmitted to both baskets and induce vibrations.

Abstract: A vibratory screening apparatus for removing suspended solids from liquid comprising a first mesh screen having openings with first and second dimensions for receiving the suspended solids thereon, a second mesh screen in superimposed abutment with the first screen and having openings with a third and fourth dimension perpendicular to the first screen openings, the third dimensions being larger than the first dimension and the fourth dimension being smaller than the second dimension of the first screen openings, and a vibratory source coupled to the abutting screens for vibrating the screens whereby the openings of the second screen effectively prevent suspended solids from becoming lodged in the openings of the first screen.

Abstract: The method and apparatus for separating materials includes a feed splitting assembly (27) which evenly divides the materials to be separated into equal parts for inputs to a like plurality of screen assemblies (16, 17, 18). These inputs are evenly distributed across the width of some of the screen assemblies (17, 18) by manifolds (44, 51). One of the screen assemblies (16) can receive the input directly through an aperture (40) in the feed splitting assembly (27). The material not passing through the screen assemblies (16, 17, 18) is collected at one location and the material passing therethrough is transmitted to a common discharge spout (55).

Abstract: An apparatus for classifying granular material comprises an outer frame and an inner frame, a screen deck mounted in the inner frame; apparatus suspending the inner frame and deck from the outer frame; resilient apparatus mounting the deck on the inner frame; apparatus for vibrating the at least one screen at the high frequency and in a generally vertical plane and apparatus for applying the lower frequency motion to the inner frame and deck in a generally horizontal plane.

Abstract: Apparatus for supporting screen (12) in a screening machine (10) that will permit long-life of the screen even when subjected to heat and vibration. The screen or wire cloth edge is folded over (30) and fastened or joined (42, 44, 46), with a metal rod (32) inserted down through the foldover space (34). Spring clips (40) or other adjustable tensioning devices attach the steel rod (32) to the screening machine frame (50), thus placing the screen (12) in tension.

Abstract: A plurality of truss-like supports are secured, as by welding, and in spaced relationship, to the underside of a screen cloth. The supported screen cloth is then removably secured in position in a vibrating frame to form therewith a vibrating screen. Each truss-like support includes a support rod formed of wire rod of predetermined diameter disposed with a major portion thereof spaced from and substantially parallel to the plane of the screen cloth, and with end portions thereof merging into the plane of the end pieces of selected wire rods forming the screen cloth and being welded thereto. A spacer wire, formed from wire rod of a diameter less than that of the support rod and to an approximate sinusoidal configuration, is disposed so that the upper tips, formed by the sine configuration, are welded to the bottom surface of the screen cloth and so that the lower such tips are welded to the upper surface of the support rod.

Abstract: A material separating device (10) includes a frame member (13) which carries a plurality of vertically arranged support members (19-23). Each of the support members (19-23) includes a plurality of support rods (19A-D, 20A-D, 21A-D, 22A-D, 23A-D). Screen elements (24-28) are stretched by adjustable tensioning devices (30) over each of the support members (19-23) to form screen panels (24a-e, 25a-e, 26a-e, 27a-e, 28a-e) between the support rods (19A-D, 20A-D, 21A-D, 22A-D, 23A-D). Each successive screen panel (24a-e, 25a-e, 26a-e, 27a-e, 28a-e) is inclined at a greater angle than the preceding screen panel (24a-e, 25a-e, 26a-e, 27a-e, 28a-e) so that material being separated moves progressively faster as it traverses each screen element (24-28).

Abstract: Relatively fine materials are separated from bulky materials by a two-tier screen assembly mounted on springs and shaken by an off balance drive. The screen assembly spans the space between two parallel plates which are joined by staggered crossbeams. An upper screen is supported by longitudinal bars which rest across upper crossbeams, and two lower screens rest on lower crossbeams. The crossbeams are joined by a longitudinal center plate. In use, the forces of heavy weights tending to bend a given crossbeam are transmitted through the center plate to the joined crossbeams to reduce the strain on the single beam.

Abstract: A stack of interfitting sieve trays are held in position on a carrier by an upstanding periperial wall on the carrier which engages the lower portion of the lower sieve tray, and by a plurality of clamp-down units which at their lower ends are pivotally connected to end portions of the carrier and at their upper ends include a lever operated hook mechanisms for engaging upper edge portions of the top sieve tray. Side edge portions of the carrier are provided with upper and lower bearing strips. These edge portions are received between upper and lower sets of cam rollers which are mounted onto web portions of side members which have been fashioned from channel stock. The side members carry bearing strips which contact and guide the side edges of the carrier. The clamp-down units are overweighted on their outer sides so that when released they will fall outwardly against stop means for limiting the amount of outward movement.

Abstract: A separator of the vibratory type comprising a box assembly of a plurality of planar pan screens resiliently suspended on a support base for vibratory motion thereon by resilient tension springs mounted between the box assembly and surrounding base truss members. The pan screens in the box assembly are formed of cylindrical sleeve frames and a circular screen having an elastomeric ring about its outer periphery with an external rim grooved to receive the lower edge of the superior sleeve frame. The pan screens are assembled into the box assembly by a plurality of tie rods disposed about the outer periphery of the box assembly to axially compress the assembly and screens into position and assure their support of material. The upper edge of each of the sleeve frames is deflected inwardly to telescopically receive the lower edge of the superior pan screen and effect radial deflection of the elastomeric ring of the superior pan screen when the assembly is compressed.

Abstract: A vibratory screening apparatus has a pair of screen cloths in close face to face abutment with the wires of the lower screen cloth generally intersecting the openings of the upper screen cloth to prevent "blinding" of the upper screen cloth by reason of the tendency of the wires of the lower screen cloth to prevent engagement of particles in the upper screen cloth of a size which would tend to clog the openings of the upper screen cloth. The mesh size of the lower screen cloth may be equal to the mesh size of the upper screen cloth or slightly larger than the upper screen cloth openings up to about 50 per cent larger. The superposed screen cloths may rest upon a much coarser mesh screen which serves merely as a structural support for the screen cloths and does not perform a screening function.

Abstract: A clamping device adapted to tighten a screen bottom onto a screen frame in a screening apparatus. The clamping device is provided with means disposed on one side of the screen frame for pneumatically tightening one side of the screen bottom to that side of the screen frame, the opposite side of the screen bottom being attached to the opposite side of the screen frame. The pneumatic tightening means is provided with a flexible inflatable hose and a compressed air source connected to the hose for inflating and deflating the hose.