End lid design and removal tool

1. In a motorized drum having a drum shell and a motor disposed inside the drum shell, an end lid removal arrangement comprising:

an end lid having an outer circumferential geometry with a first nominal diameter, the circumferential geometry having an end lid recess;

a removal tool having an inner circumferential geometry with a second nominal diameter that is larger than the first nominal diameter, and a tool recess in the inner circumferential geometry, the tool recess being configured to complement the end lid recess; and

a joining cord having a cross-sectional geometry that is responsive to the combination of the end lid recess and the tool recess.

2. In a motorized drum having a drum shell and a motor disposed inside the drum shell, an end lid removal arrangement comprising:

an end lid having an outer circumferential spiral geometry with a first nominal diameter;

a removal tool with an inner circumferential spiral geometry with a second larger nominal diameter, the inner circumferential spiral geometry being configured to engage the outer circumferential spiral geometry; and

a force generating arrangement for applying an axially outward force to the inner circumferential spiral geometry of the removal tool engaged with the outer circumferential spiral geometry of the end lid, whereby the end lid arrangement is urged axially outward in response to the axially outward force conveyed to the end lid arrangement.

3. In a conveyor roller having a drum shell having an outer surface, an inner surface, and a central shaft, the drum shell being coaxially arranged around the central shaft, a drum shell closure arrangement comprising:

a mounting face disposed at a predetermined axially inward distance within the drum shell, said mounting face having a mounting face concentric protuberance extending in an axially outward direction;

an end lid arrangement having an end lid concentric protuberance dimensioned to engage the mounting face concentric protuberance of the mounting face, said end lid arrangement having a first outer perimeter dimensioned to be accommodated within the inner surface of the drum shell; and

an embossed spring band interposed between the mounting face concentric protuberance and the end lid concentric protuberance.

4. The drum shell closure arrangement of claim 3 , wherein said end lid arrangement is further provided with a second outer perimeter that is radially dimensioned to correspond to the outer surface of the drum shell.

5. The drum shell closure arrangement of claim 4 , wherein the second outer perimeter constitutes an outer end lid surface, there being provided a radially inward end lid recess in the outer end lid surface for engaging with an end lid removal tool.

6. The drum shell closure arrangement of claim 5 , wherein the end lid removal tool comprises:

an inner tool surface having a radially outward tool recess for interfacing with the end lid recess in the outer end lid surface to form a channel that is comprised cross-sectionally of the of the end lid recess and the tool recess;

an inlet for enabling access to the channel;

a flexible member for occupying the channel, said flexible member accessing the channel through said inlet; and

a force generating arrangement for applying an axially outward force to said inner tool surface, whereby said end lid arrangement is urged axially outward in response to the axially outward force conveyed to said end lid arrangement via said flexible member.

7. The drum shell closure arrangement of claim 6 , wherein said force generating arrangement comprises a slide hammer.

8. The drum shell closure arrangement of claim 4 , wherein said end lid arrangement is provided with a first annular web portion for closing a first region between the central shaft and the end lid concentric protuberance, and a second annular web portion for closing a second region between the end lid concentric protuberance and the second outer perimeter, said first and second annular web portions having an axially resilient characteristic.

9. The drum shell closure arrangement of claim 8 , wherein said end lid arrangement is provided with a radially oriented drum shell interface surface, there being further provided a static seal interposed between the radially oriented drum shell interface surface and the drum shell, whereby the axially resilient characteristic of said second annular web portion maintains a spring force on said static seal.

10. The drum shell closure arrangement of claim 8 , wherein the axially resilient characteristic enables the end lid arrangement to be deformed into a concave configuration during installation thereof onto the drum shell.

11. The drum shell closure arrangement of claim 8 , wherein there is further provided a rotary seal for communicating sealingly between a radially inward portion of the first annular web and the central shaft.

12. The drum shell closure arrangement of claim 11 , wherein there is further provided a seal compression plate disposed axially adjacent a first annular web portion of said end lid arrangement that closes a first region between the central shaft and the end lid concentric protuberance for supporting the rotary seal.

13. The drum shell closure arrangement of claim 12 , wherein there is further provided a fastener for urging said seal compression plate axially outward toward said first annular web portion of said end lid arrangement.

14. The drum shell closure arrangement of claim 3 , wherein said end lid arrangement is provided with a radially oriented drum shell interface surface, there being further provided a static seal interposed between the radially oriented drum shell interface surface and the drum shell.

15. The drum shell closure arrangement of claim 3 , wherein the drum shell is a motorized drum shell.