US5944993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen assembly for vibrating screening machine
Assignee: Derrick Corp
•
Filing: 1997-11-25
•
Granted: 1999-08-31
•
Expires: 2017-11-25
Abstract
Abstract A screen assembly for a vibratory screening machine including a frame in the nature of a plate having spaced apertures therein, spaced frame members on opposite sides of the apertures, a screen formed in an undulating shape having substantially parallel ridges with downwardly sloping sides, troughs formed between the downwardly sloping sides for conducting material which is being screened, undersides on the troughs, bonds for securing the undersides of the troughs to the spaced frame members which are located on opposite sides of the apertures, and channels at the sides of the plate for securing the frame to a vibratory screening machine.
Inventors
- 👤 William W. Derrick
- 👤 John J. Bakula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:37
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4654; B01; B01D; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D29/50; B01D29/56; B01D29/62; B01D29/70; B01D29/72; B01D33/00; B01D33/01; B01D33/03; B07B1/4663; B07B1/4672; B07B1/469
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
96 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame, a plurality of apertures in said frame, spaced frame members on opposite sides of said plurality of apertures, a screen formed in an undulating shape with elongated substantially parallel ridges having sloping sides, troughs formed between said sloping sides for conducting material which is being screened longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said spaced frame members with said ridges overlying said plurality of apertures.
Claim 2
Dependent Claim
96 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame, a plurality of apertures in said frame, spaced frame members on opposite sides of said plurality of apertures, a screen formed in an undulating shape with elongated substantially parallel ridges having sloping sides, troughs formed between said sloping sides for conducting material which is being screened longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said spaced frame members with said ridges overlying said plurality of apertures.
Claim 3
Dependent Claim
48 words
A screen assembly as set forth in claim 1 wherein said frame has a length and a width, and wherein said plurality of apertures comprise a plurality of apertures extending in the direction of said length and a plurality of apertures extending in the direction of said width.
Claim 4
Dependent Claim
40 words
A screen assembly as set forth in claim 1 wherein said screen comprises an undulating coarse supporting screen, and an undulating fine screening screen bonded to said coarse screen on the opposite side of said coarse screen from said frame.
Claim 5
Dependent Claim
48 words
A screen assembly as set forth in claim 3 wherein said frame has a length and a width, and wherein said plurality of apertures comprise a plurality of apertures extending in the direction of said length and a plurality of apertures extending in the direction of said width.
Claim 6
Dependent Claim
17 words
A screen assembly as set forth in claim 1 wherein said frame is fabricated of tubular members.
Claim 7
Dependent Claim
17 words
A screen assembly as set forth in claim 1 wherein said frame is fabricated of solid rods.
Claim 8
Dependent Claim
37 words
A screen assembly as set forth in claim 1 wherein said frame members extend crosswise to said ridges and said troughs, and wherein said undersides of said troughs are secured at spaced locations to said frame members.
Claim 9
Dependent Claim
23 words
A screen assembly as set forth in claim 7 wherein said undersides of said troughs are bonded to said frame members by epoxy.
Claim 10
Dependent Claim
23 words
A screen assembly as set forth in claim 1 wherein said screen comprises a plurality of screens of different mesh size bonded together.
Claim 11
Dependent Claim
116 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame, a plurality of apertures in said frame, said frame comprising elongated spaced frame members on opposite sides of said plurality of apertures, a screen formed in an undulating shape with elongated substantially parallel ridges having sides, troughs formed between said sides for conducting material which is being screened longitudinally thereof while it is being screened, undersides on said troughs, said undersides of said troughs being secured to said spaced frame members, said undulating screen comprising an undulating screening screen and an undulating apertured frame formed in the same undulating shape as said screening screen and located in underlying relationship thereto.
Claim 12
Dependent Claim
116 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame, a plurality of apertures in said frame, said frame comprising elongated spaced frame members on opposite sides of said plurality of apertures, a screen formed in an undulating shape with elongated substantially parallel ridges having sides, troughs formed between said sides for conducting material which is being screened longitudinally thereof while it is being screened, undersides on said troughs, said undersides of said troughs being secured to said spaced frame members, said undulating screen comprising an undulating screening screen and an undulating apertured frame formed in the same undulating shape as said screening screen and located in underlying relationship thereto.
Claim 13
Dependent Claim
151 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame having a length and a width, an area defined by said length and width, a plurality of frame members on said frame extending in the direction of said length, a plurality of apertures defined by said frame members, a screen formed in an undulating shape to provide a screening area which is larger than said area of said frame, said undulating screen including a plurality of alternating parallel ridges and troughs, said ridges further including side walls defining said troughs for conducting material which is being screened longitudinally of said troughs while it is being screened, undersides on said plurality of troughs, said undersides of said plurality of troughs being secured to said frame members where said undersides of said troughs overlie said frame members, and said plurality of ridges overlying said plurality of apertures.
Claim 14
Dependent Claim
151 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame having a length and a width, an area defined by said length and width, a plurality of frame members on said frame extending in the direction of said length, a plurality of apertures defined by said frame members, a screen formed in an undulating shape to provide a screening area which is larger than said area of said frame, said undulating screen including a plurality of alternating parallel ridges and troughs, said ridges further including side walls defining said troughs for conducting material which is being screened longitudinally of said troughs while it is being screened, undersides on said plurality of troughs, said undersides of said plurality of troughs being secured to said frame members where said undersides of said troughs overlie said frame members, and said plurality of ridges overlying said plurality of apertures.
Claim 15
Dependent Claim
17 words
A screen assembly as set forth in claim 11 wherein said frame members comprise tubular members, respectively.
Claim 16
Dependent Claim
15 words
A screen assembly as set forth in claim 11 wherein said frame members comprise rods.
Claim 17
Dependent Claim
21 words
A screen assembly as set forth in claim 11 including means for securing said screen assembly to a vibratory screening machine.
Claim 18
Dependent Claim
173 words
A plurality of screen assemblies for mounting on a vibratory screening machine for screening material, each assembly comprising a plate, a plurality of apertures in said plate, a screen formed in an undulating shape with elongated substantially parallel ridges, troughs formed between said ridges of each of said screen assemblies for conducting material longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said plate with said ridges overlying said plurality of apertures, first ends on said ridges, second ends on said troughs, each screen assembly being mounted adjacent to another screen assembly with certain of said first ends of said ridges being adjacent to each other and certain of said first ends of said troughs being adjacent to each other and with said ridges and troughs of adjacent assemblies being in alignment so that material which is being screened can pass through said adjacent second ends of said troughs and longitudinally through the aligned troughs of said adjacent screen assemblies.
Claim 19
Dependent Claim
173 words
A plurality of screen assemblies for mounting on a vibratory screening machine for screening material, each assembly comprising a plate, a plurality of apertures in said plate, a screen formed in an undulating shape with elongated substantially parallel ridges, troughs formed between said ridges of each of said screen assemblies for conducting material longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said plate with said ridges overlying said plurality of apertures, first ends on said ridges, second ends on said troughs, each screen assembly being mounted adjacent to another screen assembly with certain of said first ends of said ridges being adjacent to each other and certain of said first ends of said troughs being adjacent to each other and with said ridges and troughs of adjacent assemblies being in alignment so that material which is being screened can pass through said adjacent second ends of said troughs and longitudinally through the aligned troughs of said adjacent screen assemblies.
Claim 20
Dependent Claim
28 words
A plurality of screen assemblies as set forth in claim 15 wherein said first ends of said ridges are sealed against entry of material which is being screened.
Claim 21
Dependent Claim
25 words
A plurality of screen assemblies as set forth in claim 15 including means for securing each of said screen assemblies to a vibratory screening machine.
Claim 22
Dependent Claim
176 words
A plurality of screen assemblies for mounting on a vibratory screening machine for screening material, each assembly comprising a frame, a plurality of apertures in said frame, a screen formed in an undulating shape with elongated substantially parallel ridges, troughs formed between said ridges of each of said screen assemblies for conducting material which is being screened longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said frame with said ridges overlying said plurality of apertures, first ends on said ridges, second ends on said troughs, each assembly being mounted adjacent to another screen assembly with certain of said first ends of said ridges being adjacent to each other and certain of said first ends of said troughs being adjacent to each other and with said ridges and troughs of adjacent assemblies being in alignment so that material which is being screened can pass through said adjacent second ends of said troughs and longitudinally through the aligned troughs of said adjacent screen assemblies.
Claim 23
Dependent Claim
176 words
A plurality of screen assemblies for mounting on a vibratory screening machine for screening material, each assembly comprising a frame, a plurality of apertures in said frame, a screen formed in an undulating shape with elongated substantially parallel ridges, troughs formed between said ridges of each of said screen assemblies for conducting material which is being screened longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said frame with said ridges overlying said plurality of apertures, first ends on said ridges, second ends on said troughs, each assembly being mounted adjacent to another screen assembly with certain of said first ends of said ridges being adjacent to each other and certain of said first ends of said troughs being adjacent to each other and with said ridges and troughs of adjacent assemblies being in alignment so that material which is being screened can pass through said adjacent second ends of said troughs and longitudinally through the aligned troughs of said adjacent screen assemblies.
Claim 24
Dependent Claim
28 words
A plurality of screen assemblies as set forth in claim 18 wherein said first ends of said ridges are sealed against entry of material which is being screened.
Claim 25
Dependent Claim
25 words
A plurality of screen assemblies as set forth in claim 18 including means for mounting each of said screen assemblies on a vibratory screening machine.
Claim 26
Dependent Claim
154 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a plate having a length and a width, an area defined by said length and width, a plurality of plate members on said plate, a plurality of apertures defined by said plate members, a multiple-layer screen formed in an undulating shape to provide a screening area which is larger than said area of said plate, said multiple layer screen including a plurality of alternating parallel ridges and troughs, said ridges further including side walls extending toward said plate, troughs between said ridges for conducting material which is being screened longitudinally of said troughs while it is being screened, undersides on said plurality of troughs, said undersides of said plurality of troughs being secured to said plate, and said plurality of ridges which comprise said screening area which is larger than the area of said plate overlying said plurality of apertures.
Claim 27
Dependent Claim
154 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a plate having a length and a width, an area defined by said length and width, a plurality of plate members on said plate, a plurality of apertures defined by said plate members, a multiple-layer screen formed in an undulating shape to provide a screening area which is larger than said area of said plate, said multiple layer screen including a plurality of alternating parallel ridges and troughs, said ridges further including side walls extending toward said plate, troughs between said ridges for conducting material which is being screened longitudinally of said troughs while it is being screened, undersides on said plurality of troughs, said undersides of said plurality of troughs being secured to said plate, and said plurality of ridges which comprise said screening area which is larger than the area of said plate overlying said plurality of apertures.
Claim 28
Dependent Claim
39 words
A screen assembly as set forth in claim 21 wherein said multi-layer screen comprises a coarse supporting screen, and a fine screening screen bonded to said coarse screen on the opposite side of said coarse screen from said plate.
Claim 29
Dependent Claim
21 words
A screen assembly as set forth in claim 21 including means for mounting said screen assembly on a vibratory screening machine.
Claim 30
Dependent Claim
44 words
A screen assembly as set forth in claim 22 wherein said screen further comprises an apertured plate formed in the same undulating shape as said coarse and fine screens and located in underlying relationship to said coarse supporting screen and secured to said plate.
Claim 31
Dependent Claim
42 words
A screen assembly as set forth in claim 21 wherein said screen comprises an undulating screening screen and an apertured plate formed in the same undulating shape as said screening screen and located in underlying relationship thereto and secured to said plate.
Claim 32
Dependent Claim
27 words
A screen assembly as set forth in claim 25 wherein said elongated ridges have end portions which are sealed against entry of material which is being screened.
Claim 33
Dependent Claim
27 words
A screen assembly as set forth in claim 21 wherein said elongated ridges have end portions which are sealed against entry of material which is being screened.
Claim 34
Dependent Claim
56 words
A screen assembly as set forth in claim 21 wherein said screen comprises an undulating base screen of relatively large mesh, an undulating top screening screen of fine mesh, and an undulating intermediate screening screen of less fine mesh than said top screen, said intermediate screen being located between said base screen and said top screen.
Claim 35
Dependent Claim
27 words
A screen assembly as set forth in claim 28 wherein said elongated ridges have end portions which are sealed against entry of material which is being screened.
Claim 36
Dependent Claim
52 words
A screen assembly for screening material in a vibratory screening machine comprising an undulating apertured plate having ridges, trough means between said ridges for conducting material to be screened longitudinally of said ridges, and a screen formed in the same configuration as said apertured plate and bonded in complementary mating relationship thereto.
Claim 37
Dependent Claim
52 words
A screen assembly for screening material in a vibratory screening machine comprising an undulating apertured plate having ridges, trough means between said ridges for conducting material to be screened longitudinally of said ridges, and a screen formed in the same configuration as said apertured plate and bonded in complementary mating relationship thereto.
Claim 38
Dependent Claim
22 words
A screen assembly as set forth in claim 30 including open ends on said ridges, and means for sealing said open ends.
Claim 39
Dependent Claim
26 words
A screen assembly as set forth in claim 31 including an apertured frame secured to said apertured plate on the opposite side thereof from said screen.
Claim 40
Dependent Claim
26 words
A screen assembly as set forth in claim 30 including an apertured frame secured to said apertured plate on the opposite side thereof from said screen.
Claim 41
Dependent Claim
59 words
A screen for screening material in a vibratory screening machine comprising a coarse screen and a fine screen bonded thereto, said fine and coarse screens being formed into an undulating shape having substantially parallel ridges, and trough means between said ridges for conducting material being screened in a direction longitudinally of said ridges while said material is being screened.
Claim 42
Dependent Claim
59 words
A screen for screening material in a vibratory screening machine comprising a coarse screen and a fine screen bonded thereto, said fine and coarse screens being formed into an undulating shape having substantially parallel ridges, and trough means between said ridges for conducting material being screened in a direction longitudinally of said ridges while said material is being screened.
Claim 43
Dependent Claim
29 words
A screen as set forth in claim 34 including an intermediate screen which is less fine than said fine screen bonded between said fine screen and said coarse screen.
Claim 44
Dependent Claim
18 words
A screen as set forth in claim 34 wherein said ridges have ends, and seals sealing said ends.
Claim 45
Dependent Claim
100 words
In a vibratory screening machine having a machine frame and frame members on said machine frame, a screen assembly for screening material comprising a screen frame mounted on said machine frame, a plurality of apertures in said screen frame, a screen formed in an undulating shape with elongated substantially parallel ridges having sloping sides, troughs formed between said sloping sides for conducting material which is being screened longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said screen frame with said ridges overlying said plurality of apertures.
Claim 46
Dependent Claim
100 words
In a vibratory screening machine having a machine frame and frame members on said machine frame, a screen assembly for screening material comprising a screen frame mounted on said machine frame, a plurality of apertures in said screen frame, a screen formed in an undulating shape with elongated substantially parallel ridges having sloping sides, troughs formed between said sloping sides for conducting material which is being screened longitudinally of said troughs while it is being screened, and undersides on said troughs, said undersides of said troughs being secured to said screen frame with said ridges overlying said plurality of apertures.
Claim 47
Dependent Claim
50 words
In a vibratory screening machine as set forth in claim 37 wherein said frame has a length and a width, and wherein said plurality of apertures comprise a plurality of apertures extending in the direction of said length and a plurality of apertures extending in the direction of said width.
Claim 48
Dependent Claim
43 words
In a vibratory screening machine as set forth in claim 37 wherein said screen comprises an undulating coarse supporting screen, and an undulating fine screening screen bonded to said coarse screen on the opposite side of said coarse screen from said screen frame.
Claim 49
Dependent Claim
38 words
In a vibratory screening machine as set forth in claim 37 wherein said elongated ridges have end portions, and sealing means for sealing said end portions of said elongated ridges against entry of material which is being screened.
Claim 50
Dependent Claim
32 words
In a vibratory screening machine as set forth in claim 40 wherein said sealing means comprise molded cap members which are molded into place in said first end portions of said ridges.
Claim 51
Dependent Claim
92 words
A screen assembly for screening material in a vibratory screening machine, said screen assembly comprising a frame, a plurality of apertures in said frame, a screen formed in an undulating shape with elongated substantially parallel ridges having sides, troughs formed between said sides for conducting material which is being screened longitudinally of said troughs while it is being screened, undersides on said troughs, said undersides of said troughs being secured to said frame with said ridges overlying said plurality of apertures, and means for securing said frame to a vibratory screening machine.
Claim 52
Dependent Claim
92 words
A screen assembly for screening material in a vibratory screening machine, said screen assembly comprising a frame, a plurality of apertures in said frame, a screen formed in an undulating shape with elongated substantially parallel ridges having sides, troughs formed between said sides for conducting material which is being screened longitudinally of said troughs while it is being screened, undersides on said troughs, said undersides of said troughs being secured to said frame with said ridges overlying said plurality of apertures, and means for securing said frame to a vibratory screening machine.
Claim 53
Dependent Claim
48 words
A screen assembly as set forth in claim 42 wherein said frame has a length and a width, and wherein said plurality of apertures comprise a plurality of apertures extending in the direction of said length and a plurality of apertures extending in the direction of said width.
Claim 54
Dependent Claim
40 words
A screen assembly as set forth in claim 42 wherein said screen comprises an undulating coarse supporting screen, and an undulating fine screening screen bonded to said coarse screen on the opposite side of said coarse screen from said frame.
Claim 55
Dependent Claim
36 words
A screen assembly as set forth in claim 42 wherein said elongated ridges have end portions, and sealing means for sealing said end portions of said elongated ridges against entry of material which is being screened.
Claim 56
Dependent Claim
29 words
A screen assembly as set forth in claim 45 wherein said sealing means comprise molded cap members which are molded into place in said end portions of said ridges.
Claim 57
Dependent Claim
23 words
A screen assembly as set forth in claim 42 wherein said screen comprises a plurality of screens of different mesh size bonded together.
Claim 58
Dependent Claim
110 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame, a plurality of apertures in said frame, a screen formed in an undulating shape with elongated substantially parallel ridges having sides, troughs formed between said sides for conducting material which is being screened longitudinally thereof while it is being screened, undersides on said troughs, said undersides of said troughs being secured to said frame, said undulating screen comprising an undulating screening screen and an undulating apertured plate formed in the same undulating shape as said screening screen and located in underlying relationship thereto, and means for securing said frame to a vibratory screening machine.
Claim 59
Dependent Claim
110 words
A screen assembly for screening material in a vibratory screening machine, said assembly comprising a frame, a plurality of apertures in said frame, a screen formed in an undulating shape with elongated substantially parallel ridges having sides, troughs formed between said sides for conducting material which is being screened longitudinally thereof while it is being screened, undersides on said troughs, said undersides of said troughs being secured to said frame, said undulating screen comprising an undulating screening screen and an undulating apertured plate formed in the same undulating shape as said screening screen and located in underlying relationship thereto, and means for securing said frame to a vibratory screening machine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |