Screen assembly for a vibratory separator

Claim 2

A screen assembly for a vibratory separator comprising a frame having a first attachment surface on one side and a second attachment surface on the other side; first screen cloth fixed relative to the frame at the first attachment surface, the first screen cloth having first openings therethrough; second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having second openings larger than and up to five times larger than the first openings of the first screen cloth.

Claim 3

The screen assembly for a vibratory separator of claim 1 further comprising first support screen cloth fixed relative to the frame between the first screen cloth and the frame and having third openings substantially larger than the first openings of the first screen cloth.

Claim 4

The screen assembly for a vibratory separator of claim 2 further comprising second support screen cloth fixed relative to the frame and having fourth openings substantially larger than the second openings of the second screen cloth, the second screen cloth being between the frame and the second support screen cloth.

Claim 5

The screen assembly for a vibratory separator of claim 1 further comprising second support screen cloth fixed relative to the frame and having fourth openings substantially larger than the second openings of the second screen cloth, the second screen cloth being between the frame and the second support screen cloth.

Claim 6

The screen assembly for a vibratory separator of claim 1, the first screen cloth and the second screen cloth being bias mounted on the frame.

Claim 7

The screen assembly for a vibratory separator of claim 1, the second openings being from two to five times larger than the first openings.

Claim 8

A screen assembly for a vibratory separator comprising a frame having a first attachment surface on one side and a second attachment surface on the other side; first screen cloth fixed relative to the frame at the first attachment surface and having first openings; second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having second openings larger than and up to five times larger than the first openings of the first screen cloth; a pattern of dividers extending across the frame, the dividers having a first divider attachment surface continuous with the first attachment surface and a second divider attachment surface continuous with the second attachment surface.

Claim 9

A screen assembly for a vibratory separator comprising a frame having a first attachment surface on one side and a second attachment surface on the other side; first screen cloth fixed relative to the frame at the first attachment surface and having first openings; second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having second openings larger than and up to five times larger than the first openings of the first screen cloth; a pattern of dividers extending across the frame, the dividers having a first divider attachment surface continuous with the first attachment surface and a second divider attachment surface continuous with the second attachment surface.

Claim 10

The screen assembly for a vibratory separator of claim 7 further comprising first support screen cloth fixed relative to the frame between the first screen cloth and the frame and dividers and having third openings substantially larger than the first openings of the first screen cloth.

Claim 11

The screen assembly for a vibratory separator of claim 7 further comprising second support screen cloth fixed relative to the frame and having fourth openings substantially larger than the second openings of the second screen cloth, the second screen cloth being between the frame and the second support screen cloth.

Claim 12

The screen assembly for a vibratory separator of claim 7, the frame being rectangular, the dividers including straight elements extending mutually parallel across the frame from one side to another and at least one cross element extending perpendicularly to the straight elements.

Claim 13

The screen assembly for a vibratory separator of claim 7, the frame being circular, the dividers including straight elements extending radially inwardly from the frame and at least one segment of an element concentric with the frame and inwardly of the frame.

Claim 14

The screen assembly for a vibratory separator of claim 7, the second openings being from two to five times larger than the first openings.

Claim 15

A screen assembly for a vibratory separator comprising a frame having a first attachment surface on one side and a second attachment surface on the other side; first screen cloth fixed relative to the frame at the first attachment surface, the first screen cloth having first openings therethrough; second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having second openings larger than and up to five times larger than the first openings of the first screen cloth; a pattern of dividers extending across the frame, the dividers having a first divider attachment surface continuous with the first attachment surface and a second divider attachment surface continuous with the second attachment surface, the first screen cloth being attached at the first divider attachment surface and the second screen cloth being attached at the second divider attachment surface.

Claim 16

A screen assembly for a vibratory separator comprising a frame having a first attachment surface on one side and a second attachment surface on the other side; first screen cloth fixed relative to the frame at the first attachment surface, the first screen cloth having first openings therethrough; second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having second openings larger than and up to five times larger than the first openings of the first screen cloth; a pattern of dividers extending across the frame, the dividers having a first divider attachment surface continuous with the first attachment surface and a second divider attachment surface continuous with the second attachment surface, the first screen cloth being attached at the first divider attachment surface and the second screen cloth being attached at the second divider attachment surface.

Claim 17

The screen assembly for a vibratory separator of claim 13 further comprising first support screen cloth fixed relative to the frame between the first screen cloth and the frame and having third openings substantially larger than the first openings of the first screen cloth.

Claim 18

The screen assembly for a vibratory separator of claim 13, the frame being rectangular, the dividers including straight elements extending mutually parallel across the frame from one side to another and at least one cross element extending perpendicularly to the straight elements.

Claim 19

The screen assembly for a vibratory separator of claim 15, the straight elements extending between opposed sides of the frame.

Claim 20

The screen assembly for a vibratory separator of claim 16, the pattern of dividers creating about twenty four compartments between the first screen and the second screen.

Claim 21

The screen assembly for a vibratory separator of claim 13, the frame being circular, the dividers including straight elements extending radially inwardly from the frame and at least one segment of an element concentric with the frame and inwardly of the frame.

Claim 22

The screen assembly for a vibratory separator of claim 13, the first screen cloth and the second screen cloth being bias mounted on the frame and relative to the pattern of dividers.

Claim 23

The screen assembly for a vibratory separator of claim 13, the second openings being from two to five times larger than the first openings.

Claim 24

A vibratory separator comprising a base; a housing resiliently mounted on the base; a vibratory drive mounted to the housing; at least one screen assembly mounted on the housing and including a frame having a first attachment surface on one side and a second attachment surface on the other side, first screen cloth fixed relative to the frame at the first attachment surface, and second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having openings larger than and up to five times larger than the openings of the first screen cloth.

Claim 25

A vibratory separator comprising a base; a housing resiliently mounted on the base; a vibratory drive mounted to the housing; at least one screen assembly mounted on the housing and including a frame having a first attachment surface on one side and a second attachment surface on the other side, first screen cloth fixed relative to the frame at the first attachment surface, and second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having openings larger than and up to five times larger than the openings of the first screen cloth.

Claim 26

A vibratory separator comprising a base; a housing resiliently mounted on the base; a vibratory drive mounted to the housing; at least one screen assembly mounted on the housing and including a frame having a first attachment surface on one side and a second attachment surface on the other side, first screen cloth fixed relative to the frame at the first attachment surface, second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having openings larger than and up to five times larger than the openings of the first screen cloth, and a pattern of dividers extending across the frame, the dividers having the same height as the thickness of the frame, the dividers having a first divider attachment surface and a second divider attachment surface, the first screen cloth being attached at the first divider attachment surface and the second screen cloth being attached at the second divider attachment surface.

Claim 27

A vibratory separator comprising a base; a housing resiliently mounted on the base; a vibratory drive mounted to the housing; at least one screen assembly mounted on the housing and including a frame having a first attachment surface on one side and a second attachment surface on the other side, first screen cloth fixed relative to the frame at the first attachment surface, second screen cloth fixed relative to the frame at the second attachment surface, the second screen cloth having openings larger than and up to five times larger than the openings of the first screen cloth, and a pattern of dividers extending across the frame, the dividers having the same height as the thickness of the frame, the dividers having a first divider attachment surface and a second divider attachment surface, the first screen cloth being attached at the first divider attachment surface and the second screen cloth being attached at the second divider attachment surface.

Claim 28

The vibratory separator of claim 22, the dividers including straight elements extending mutually parallel across the frame from one side to another and at least one cross element extending perpendicularly to the straight elements.

Claim 29

The vibratory separator of claim 23, the frame being rectangular, the straight elements extending between opposed sides of the frame.

Claim 30

The vibratory separator of claim 24, the pattern of dividers creating about twenty four compartments between the first screen and the second screen.

Claim 31

The vibratory separator of claim 23, the straight elements extending in the direction of material flow on the screen.

Claim 32

The vibratory separator of claim 23, the screen assembly further including first support screen cloth fixed relative to the frame between the first screen cloth and the frame and having openings substantially larger than the openings of the first screen cloth vibratory separator.

Claim 33

The vibratory separator of claim 22, the second screen cloth having openings two to five times larger than the openings of the first screen cloth.