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专利名称：Yieldable prop having a yield section发明人：John C. Stankus,John G. Oldsen申请号：US10858621申请日：20040602公开号：US07134810B2公开日：20061114
专利附图：
摘要：A yieldable prop having a first end and a second end includes a first hollowconduit, a second conduit slidably received in the first hollow conduit, and a clampassembly positioned adjacent the juncture of the first hollow conduit and the secondconduit. A yield section is provided at the end of the first and/or second conduits, or at
the juncture of the first and second conduits. The yield section includes a shroud spacedfrom an inner pipe to provide a space to receive a collapsible insert. An end of a conduit ispositioned in the space and compresses the insert when the compressive load on theprop exceeds the compressive load capacity of the insert.
申请人：John C. Stankus,John G. Oldsen
地址：Canonsburg PA US,Butler PA US
国籍：US,US
代理机构：The Webb Law Firm
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