Mark Mason Hargett,Bradley Edward Walsh,David Carlton Ordway
申请号：
US13929863
公开号：
US09868606B2
申请日:
2013.06.28
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A rotary drum apparatus comprises a drum that is rotatable about an axis of rotation. The apparatus comprises a first set of first shell segments having a first number of first shell segments. Each first shell segment is releasably connectable with the drum and has an outer surface. The outer surfaces of the first shell segments combine to form a continuous first outer circumferential surface defining a maximum radial distance from the axis of rotation. The apparatus comprises a second set of second shell segments having a second number of second shell segments. Each second shell segment is releasably connectable with the drum and has an outer surface. The outer surfaces of the second shell segments combine to form a continuous second outer circumferential surface located within 10% of the maximum radial distance. The first number of first shell segments is greater than the second number of second shell segments.
