发明名称 Snow shovel
摘要 An improved snow shovel is disclosed which has a telescoping handle and a detachable blade. Inside the handle is a compression spring which compresses under load or shock from striking an object submerged in the snow and when the shovel is lifted, the spring decompresses and assists in discharging the load.
申请公布号 US4691954(A) 申请公布日期 1987.09.08
申请号 US19860896975 申请日期 1986.08.15
申请人 SHAUD, RONALD J. 发明人 SHAUD, RONALD J.
分类号 B25G1/04;E01H5/02;(IPC1-7):B25G1/04 主分类号 B25G1/04
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