Liquid purification or separation – Filter – Movable medium
Reexamination Certificate
2001-11-16
2003-05-20
Lithgow, Thomas M. (Department: 1724)
Liquid purification or separation
Filter
Movable medium
C210S780000, C210S389000, C210S330000, C210S335000, C209S315000, C209S397000, C209S399000, C209S401000, C209S403000
Reexamination Certificate
active
06564947
ABSTRACT:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable
BACKGROUND OF THE INVENTION
The present invention relates to an improved vibratory screen assembly for a vibratory screening machine and to an improved method of fabrication thereof.
In parent patent application Ser. No. 08/062,464, filed May 14, 1993, now U.S. Pat. No. 5,417,858, dated May 23, 1995, a vibratory screen assembly is disclosed having an undulating screen subassembly bonded to a perforated plate and frame. In copending patent application Ser. No. 08/443,377, filed May 17, 1995, a vibratory screen assembly is disclosed which is an improvement over the prior assembly in that the screen subassembly is bonded by a fused plastic grid which is bonded to a frame or plate.
BRIEF SUMMARY OF THE INVENTION
It is the object of the present invention to provide a method of utilizing a plurality of assembled undulating screen assemblies. Other objects and attendant advantages of the present invention will readily be perceived hereafter.
The present invention relates to a method of screening material comprising the steps of providing a plurality of undulating screen assemblies each having ridges and troughs of substantially identical external cross sectional configurations with said ridges and troughs having first and second opposite ends, mounting said plurality of undulating screen assemblies in end-to-end adjacent relationship on the bed of a vibratory screening machine with said substantially identical external cross sectional configurations of said ridges and troughs of said plurality of undulating screen assemblies being in alignment, depositing material to be screened on one of said undulating screen assemblies, and causing said material deposited on said undulating screen assemblies to travel lengthwise of said aligned substantially identical external cross sectional configurations of said ridges and troughs of said plurality of screen assemblies and to pass continuously from at least one screen assembly onto the end of an adjacent screen assembly.
The various aspects of the present invention will be more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
REFERENCES:
patent: 40242 (1863-10-01), Capell
patent: 246144 (1881-08-01), Keeler
patent: 275340 (1883-04-01), Kimball
patent: 500302 (1893-06-01), Stoeckel et al.
patent: 526562 (1894-09-01), Cross
patent: 560858 (1896-05-01), Missroon
patent: 607598 (1898-07-01), Closz
patent: 691045 (1902-01-01), Climenson et al.
patent: 800693 (1905-10-01), Traylor
patent: 964144 (1910-07-01), Chavanne et al.
patent: 964897 (1910-07-01), Bryant
patent: 966578 (1910-08-01), Murphy et al.
patent: 984866 (1911-02-01), Tate
patent: 1009069 (1911-11-01), Hunnicutt
patent: 1098979 (1914-06-01), Schuchard
patent: 1132667 (1915-03-01), Milliot
patent: 1269085 (1918-06-01), Jeske
patent: 1423021 (1922-07-01), Reynolds
patent: 1462804 (1923-07-01), Evans
patent: 1561632 (1925-11-01), Woodward
patent: 1713143 (1929-05-01), Overstrom
patent: 1947307 (1934-02-01), Rafton
patent: 1997713 (1935-04-01), Boehm
patent: 1997740 (1935-04-01), Nickerson
patent: 2038071 (1936-04-01), Wilhelm
patent: 2082513 (1937-06-01), Roberts
patent: 2089548 (1937-08-01), Frantz
patent: 2274700 (1942-03-01), Jenks
patent: 2315055 (1943-03-01), Heller
patent: 2406051 (1946-08-01), Weiss
patent: 2462878 (1949-03-01), Loque
patent: 2648441 (1953-08-01), Soldan
patent: 2723032 (1955-11-01), Gisler
patent: 2726184 (1955-12-01), Cox
patent: 2813629 (1957-11-01), Brugmann
patent: 2929464 (1960-03-01), Sprouse
patent: 2957235 (1960-10-01), Steinberg
patent: 2980208 (1961-04-01), Neumann
patent: 3057481 (1962-10-01), Pall
patent: 3165473 (1965-01-01), Pall
patent: 3255885 (1966-06-01), Burls
patent: 3306794 (1967-02-01), Humbert, Jr.
patent: 3374886 (1968-03-01), Lightsey
patent: 3465413 (1969-09-01), Rosaen et al.
patent: 3664503 (1972-05-01), Felden
patent: 3679057 (1972-07-01), Perez
patent: 3747772 (1973-07-01), Brown
patent: 3853529 (1974-12-01), Boothe et al.
patent: 3970549 (1976-07-01), Ennis et al.
patent: 4019987 (1977-04-01), Krasnow
patent: 4022596 (1977-05-01), Pedersen
patent: 4033865 (1977-07-01), Derrick
patent: 4064051 (1977-12-01), Wehner
patent: 4075106 (1978-02-01), Yamazaki
patent: 4380494 (1983-04-01), Wilson
patent: 4464263 (1984-08-01), Brownell
patent: 4512892 (1985-04-01), Ganzi
patent: 4517090 (1985-05-01), Kersten
patent: 4575421 (1986-03-01), Derrick et al.
patent: 4582597 (1986-04-01), Huber
patent: 4594162 (1986-06-01), Berger
patent: 4617122 (1986-10-01), Kruse
patent: 4647373 (1987-03-01), Tokar et al.
patent: 4696751 (1987-09-01), Eifling
patent: 4701197 (1987-10-01), Thornton
patent: 4746339 (1988-05-01), Millard
patent: 4758333 (1988-07-01), Masica et al.
patent: 4820407 (1989-04-01), Lilie
patent: 4832834 (1989-05-01), Baird, Jr.
patent: 4882054 (1989-11-01), Derrick
patent: 4940500 (1990-07-01), Tadokoro et al.
patent: 4954249 (1990-09-01), Gero
patent: 5084178 (1992-01-01), Miller
patent: 5139154 (1992-08-01), Gero et al.
patent: 5167740 (1992-12-01), Michaelis
patent: 5221008 (1993-06-01), Derrick, Jr. et al.
patent: 5230455 (1993-07-01), Price
patent: 5312508 (1994-05-01), Chisholm
patent: 5417793 (1995-05-01), Bakula
patent: 5417859 (1995-05-01), Bakula
patent: 5490598 (1996-02-01), Adams
patent: 5551575 (1996-09-01), Leone
patent: 5598930 (1997-02-01), Leone et al.
patent: 5868929 (1999-02-01), Derrick et al.
patent: 5876552 (1999-03-01), Bakula
patent: 505776 (1951-09-01), None
patent: 599661 (1960-06-01), None
patent: 3818972 (1990-02-01), None
patent: 0074935 (1983-03-01), None
patent: 453348 (1991-10-01), None
patent: 269877 (1928-04-01), None
patent: 457924 (1936-12-01), None
patent: 519680 (1940-04-01), None
patent: 743902 (1956-01-01), None
patent: 823648 (1959-11-01), None
patent: 1106513 (1968-03-01), None
patent: 1225849 (1971-03-01), None
patent: 1512948 (1978-06-01), None
patent: 2124099 (1984-02-01), None
patent: 48-88546 (1973-11-01), None
patent: 55-32404 (1980-08-01), None
patent: 59-142818 (1984-08-01), None
patent: 1-203010 (1989-08-01), None
patent: 89/10781 (1989-11-01), None
World Oil—“Layered shale shaker screens improve mud solids control” Apr. 1978—Authors Cagle and Wilder (Total pp. 7).
Petroleum Engineer International—“Solids control for the man on the rig” Oct. 1982—Authors Williams and Hoberock (Total pp. 11).
World Oil—“What to consider when evaluating shaker screen performance” Oct. 1986—Author Brown (Total pp. 5).
Petroleum Engineer International—“Solids control update” Jul. 1987—Author Cagle (Total pp. 6).
Derrick Manufacturing Corporation
Gastel Joseph P.
Lithgow Thomas M.
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