Classifying – separating – and assorting solids – Sifting – Elements
Reexamination Certificate
1998-06-04
2001-07-31
Nguyen, Tuan N. (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Elements
C209S405000, C210S490000, C210S493500, C210S499000
Reexamination Certificate
active
06267247
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to screens for vibratory shakers, screens for classifying and/or filtering material, modular screens with individual screen modules or plugs, plugs for openings in screens, plugs with screening material thereon and holes therethrough, screen useful for both dewatering and classification, and methods of screen repair and assembly.
2. Description of Related Art
The related art section of each of the above-identified applications is incorporated here fully by reference.
SUMMARY OF THE PRESENT INVENTION
The present invention, in certain embodiments, discloses a screen for a vibratory shaker for screening material flowing thereto, the screen having a frame with a plurality of spaced-apart frame openings, and a plurality of screen modules (or in other aspects, plugs) each disposed in a frame opening, each screen module having a module body with a module opening and screen means (e.g. mesh, screen, openings therethrough, etc.) at the module opening for screening material flowing thereto; such a screen wherein at least one or all screen modules is removably disposed in its respective frame opening; such a screen wherein the frame has exterior sides defining a frame space within the frame and wherein the plurality of frame openings extend substantially all across the frame space; such a screen wherein the frame is substantially flat or is corrugated; such a screen wherein the screening means is screening material (e.g. any mesh, screen or combination thereof) disposed over or in or over and in the module opening; such a screen wherein the frame has holding means and the screen modules have releasable attachment means (e.g. but not limited to a recess on one member and a bead on the other) that cooperate with the holding means to releasably mount the screen modules in the frame; such a screen wherein the frame is substantially flat with a top surface and at least one screen module (or all the modules) has a screening portion that projects above the top surface of the frame; such a screen wherein the frame has a bottom and at least one screen module (or all of them) has a screening portion that projects below the bottom surface; such a screen wherein there are projecting plug portions or module portions both above and below a frame, plate or panel and, in one aspect, holes or openings through the frame, plate or panel; such a screen wherein the plurality of screen modules includes a first set of screen modules and a second set of screen modules, the first set of screen modules having screening means having a first mesh (or screen) of a first mesh (or screen) size, and the second set of screen modules having screening means having a second mesh (or screen) of a second mesh (or screen) size, the first mesh size different from the second mesh size; such a screen wherein the first set of screen modules are for dewatering the material flowing to the vibratory shaker and the second set of screen modules are for classifying the material; such a screen wherein the screening means is removably secured to the screen modules; such a screen wherein the screening means comprises a series of openings extending through the module bodies; such a screen wherein each module body has a threaded end extendable through its respective frame opening and the screen includes a threaded nut for each screen module for mating with the threaded end of the module body to secure the screen modules in their frame openings; such a screen wherein the frame has a frame top surface and each screen module has a top surface which does not project above the frame top surface; such a screen wherein the frame (plate, panel, etc.) is corrugated including periodic raised portions and a plurality of support strips underlie and are attached to the frame, each support strip having a support body having spaced-apart ends spaced-apart sides, and a top surface, and at least one upturned finger projecting above the top surface of the support body, the at least one upturned finger configured and sized for contacting and supporting at least a part of a raised portion of the frame; such a screen wherein the at least one upturned finger is a plurality of spaced-apart upturned fingers; such a screen wherein the at least one upturned finger has a curved top with a shape corresponding to a shape of a raised portion of the frame; such a screen wherein the at least one upturned finger extends up from cuts (e.g. cuts in a plastic or metal strip disposed so that upon bending the finger(s) is created) in the support body and the at least one upturned finger is integral with the support body.
The present invention discloses, in certain embodiments a screen for a vibratory shaker for screening material flowing thereto, the screen having a frame with a plurality of spaced-apart frame openings, a plurality of screen modules (or in other aspects, plugs) each disposed in a frame opening, each screen module having a module body with a module opening and screen means at the module opening for screening material (e.g. fluid, slurries, drilling mud, etc.) flowing thereto, wherein all the screen modules are removably disposed in their respective frame openings, wherein the frame has exterior sides defining a frame space within the frame and cross members which with the exterior sides define the frame openings and wherein the plurality of frame openings extend substantially all across the frame space, wherein the frame has holding means and the screen modules have releasable attachment means that cooperate with the holding means to releasably mount the screen modules in the frame, and wherein the plurality of screen modules includes a first set of screen modules and a second set of screen modules, the first set of screen modules having screening means having a first mesh of a first mesh size, or the module body having openings therethrough of a first size, or both, and the second set of screen modules having screening means having a second mesh of a second mesh size, or the module bodies having openings of a second size, or both, the first mesh size (or first opening size) different from the second mesh size (or second opening size);
The present invention discloses, in certain embodiments, a frame for a screen for a vibratory shaker, the frame having a body with sides and cross members defining a plurality of openings (or a plate or panel with such openings) for mounting therein in each opening a screen module, mounting means for securing the screen modules in the openings; and such a frame wherein the mounting means include release means for releasably mounting each screen module in its respective opening.
The present invention discloses, in certain embodiments, a support strip for supporting part of a screen used in a vibratory shaker, the support strip having a support body having spaced-apart ends spaced-apart sides, and a top surface, and at least one upturned finger projecting above the top surface of the support body, the at least one upturned finger configured and sized for contacting and supporting at least a part of a raised portion of the frame; such a support strip wherein the at least one upturned finger is a plurality of spaced-apart upturned fingers; such a support strip wherein the at least one upturned finger has a curved top with a shape corresponding to a shape of a raised portion of the frame; and such a support strip wherein the at least one upturned finger extends up from cuts in the support body and the at least one upturned finger is integral with the support body.
The present invention, in certain embodiments, discloses a plug (or module) for disposition in an opening of a plug (or module) positioning member of a screen assembly for a vibratory separator that receives fluid with material therein for separation therefrom, the plug (or module) having a body, an opening through the body through which fluid is flowable, and screening apparatus at the opening for screening the fluid with material therein; such a plug or module wherein the screening appa
Adams Thomas C.
McClung, III Guy L.
Schulte David L.
Seyffert Kenneth
McClung Guy
Nguyen Tuan N.
Tuboscope I/P Inc.
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