Screening bar assembly for a screen

Patent metadata

Field	Value
Publication number	US-11198156-B2
Application number	US-201916252913-A
Country	US
Kind code	B2
Filing date	Jan 21, 2019
Priority date	Jan 23, 2018
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A screening bar assembly for a screen, the assembly comprising a plurality of substantially parallel screening bars mounted to a substantially rectangular support frame; a compliant mounting block being provided at each end of each screening bar to engage the support frame and a screen incorporating said assembly.

First claim

The invention claimed is:

1. A screening bar assembly for a screen, the assembly comprising a plurality of substantially parallel screening bars mounted between end members of a substantially rectangular support frame, wherein each screening bar is coupled to the support frame by at least one respective compliant mounting block, wherein said at least one mounting block is located between, and engages with, the respective end member and a surface of the respective screening bar that faces the respective end member to provide a compliant coupling between the respective screening bar and the respective end member.

2. An assembly as claimed in claim 1 , wherein the mounting blocks are formed from a polymeric material.

3. An assembly as claimed 1 , wherein the mounting blocks are formed from a metallic spring material.

4. An assembly as claimed in claim 1 , wherein the mounting blocks are formed from a fibrous or composite material.

5. An assembly as claimed in claim 1 , wherein said support frame includes a pair of opposing mounting channels, said mounting blocks engaging said mounting channels to couple the screening bars to the support frame.

6. An assembly as claimed in claim 5 , wherein said support frame comprises a pair of substantially parallel side members, said end members extending between and substantially perpendicular to the side members, said end members of the support frame incorporating said mounting channels.

7. An assembly as claimed in claim 6 , wherein the screening bars, when mounted on the support frame, extend parallel to the side members of the support frame.

8. A screening bar assembly as claimed in claim 6 , wherein each side member of the support frame and/or each end member includes a laterally extending mounting flange to facilitate mounting of the support frame to the screen.

9. An assembly as claimed in claim 1 , wherein each end of each screening bar incorporates a mounting recess within which a portion of a respective mounting block is received.

10. An assembly as claimed in claim 9 , wherein the sides of each mounting recess diverge outwardly from one another to define a wedge shaped recess receiving a correspondingly shaped portion of the respective mounting block.

11. An assembly as claimed in claim 1 , wherein the vertical depth of each screening bar increases from one end to the other.

12. An assembly as claimed in claim 11 , wherein an end of each screening bar at its deepest portion extends above the support frame.

13. An assembly as claimed in claim 11 , wherein the vertical depth of each screening bar increases from an upstream to a downstream end when installed in the support frame and mounted on the screen, in use.

14. An assembly as claimed in claim 1 , wherein spacer members are inserted between the mounting blocks of adjacent bars to maintain the position of the bars in the support frame.

15. An assembly as claimed in claim 14 , wherein said support frame includes a pair of opposing mounting channels arranged, said mounting blocks engaging said mounting channels to couple the screening bars to the support frame, and wherein said spacer members are located within said mounting channels.

16. An assembly as claimed in claim 14 , wherein retaining members are releasably attached to the support frame, the retaining members having fingers shaped to extend between the ends of adjacent bars to retain the spacer members in position.

17. As assembly as claimed in claim 1 , wherein each end of each screening bar is coupled to the support frame by a respective compliant mounting block.

18. An assembly as claimed in claim 1 , wherein said at least one mounting block provides said compliant coupling without welds or bolted connections between said at least one mounting block and the respective screening bar.

19. A screen comprising a frame defined by a pair of substantially parallel side walls interconnected by transversely extending bridging members, at least one screening bar assembly being mounted on the frame, wherein said at least one screening bar assembly comprises a plurality of substantially parallel screening bars mounted between end members of a substantially rectangular support frame, wherein each end of each screening bar is coupled to the support frame by a respective compliant mounting block provided at each end of each screening bar and engaging with a respective one of the end members.

20. A screen as claimed in claim 19 , wherein the screening bars define a sloping deck, the bars of each screening bar assembly being aligned with the slope of the deck and the path of the material thereon.

21. A screen as claimed in claim 20 , including means for imparting circular or reciprocating vibratory motion to the deck.

Assignees

• Terex Gb Ltd

Inventors

• Murphy Glenn

Classifications

• B07B1/12 Primary

  Apparatus having only parallel elements · CPC title

• B07B1/4645

  Screening surfaces built up of modular elements · CPC title

• B07B13/04

  according to size · CPC title

• B07B1/28

  Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens · CPC title