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EXPANDABLE TREE PROTECTION DEVICE
专利权人:
BROWN; WILLIAM A.
发明人:
BROWN, WILLIAM A.
申请号:
CA2911736
公开号:
CA2911736A1
申请日:
2015.11.06
申请国别(地区):
CA
年份:
2016
代理人:
摘要:
An expandable tree protection device covers an area surrounding a tree trunkandprovides for expansion to accommodate growth of the tree trunk over time. Thedeviceincludes a tray comprising a top wall and a perimeter wall coupled to andextendingaround a peripheral edge of the top wall. The tray has an aperture extendingthrough thetop wall for receiving a tree trunk therethrough. Each of a plurality ofpanels is slidablycoupled to the top wall extend into the aperture covering an associatedportion of theaperture. A respective interior edge of each panel is slidable outwardly awayfrom acenter of the aperture for expansion exposing a larger area of the aperture asthe tree trunkgrows.
来源网站:
中国工程科技知识中心
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http://www.ckcest.cn/home/

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