发明名称 A LOG STAIRCASE AND A METHOD OF PRODUCING COMPONENTS FOR A LOG STAIRCASE
摘要 A log staircase is disclosed along with a method of producing components for the log staircase. The log staircase includes an elongated stringer capable of angularly extending from a lower level to an upper level. The stringer has a n outer circumference with a notch formed therein. A protuberance extends upward from the notch. The log staircase also includes a tread having a semicircular periphery with a flat surface. An opening is formed in the semicircular periphery of the tread. The opening is designed to mate with th e protuberance to retain the flat surface crossways to the stringer. The metho d includes cutting a number notches and protuberances in each of a pair of stringers, and cutting a pair of openings in a predetermined number of tread s which are capable of mating with the protuberances to retain each of the treads crossways to the pair of stringers.
申请公布号 CA2640228(A1) 申请公布日期 2009.05.30
申请号 CA20082640228 申请日期 2008.10.03
申请人 THE ARMSTRONG CREEK COMPANY, INC. 发明人 ADAMS, TORREY WYCLISSE;TECKMAN, THOMAS HARVEN
分类号 E04F11/025;E04F11/108 主分类号 E04F11/025
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