초록 ▼

A manhole cover lifter comprising an elongate inclined lever with a handle at its upper end and a fastener at its lower end for attaching to the cover of a manhole; a depending strut intermediate the ends of the lever and a pair of wheels mounted at the lower end of the strut and on a transverse axi

A manhole cover lifter comprising an elongate inclined lever with a handle at its upper end and a fastener at its lower end for attaching to the cover of a manhole; a depending strut intermediate the ends of the lever and a pair of wheels mounted at the lower end of the strut and on a transverse axis forming a fulcrum for the lifting lever; a lifter bar connecting the wheel axle with the forward end of the lifter bar, the lifting lever being of tubular steel and a stiffener bar in the tubular lever at the upper end of the depending strut; and a handle at the upper end of the lifting lever.

대표청구항 ▼

A manhole cover lifting device comprising an elongate inclined rigid lever having a first lower end with fastener means for attachment to a manhole cover and also having a second upper end with a depending foot thereon to prevent the upper end of the lever and a workman\s hands thereon from engaging

A manhole cover lifting device comprising an elongate inclined rigid lever having a first lower end with fastener means for attachment to a manhole cover and also having a second upper end with a depending foot thereon to prevent the upper end of the lever and a workman\s hands thereon from engaging the ground, and elongate handle affixed on the upper end of the lever and extending transversely thereof at a location in superposed relation with respect to the upper end of the handle, a depending rigid strut affixed to the lever intermediate the ends and having a lower end with means mounting an elongate horizontal axle extending transversely of the strut and of the lever, said axle having a pair of ground engaging wheels thereon providing a fulcrum for the lever, both the lever and the strut being formed of rigid steel tubing and being welded together, an elongate rigid steel insert bar concealed and affixed within the tubing of the rigid lever adjacent the depending strut and extending in both longitudinal directions along the lever from the strut, an elongate lifter bar extending generally along the lever and in oblique relation thereto, one end of the lifter bar being affixed to the lower end of said strut and the other end of the lifter bar being affixed to the lower end of the lever, said lifter bar spanning across a distance approximating one-half the diameter of a manhole cover, and said fastener means including a rigid plate suspended upon a bail, said bail being secured to said first lower end of said lever said plate having an elongate slot through one side thereof to releasably receive an upright stud secured to the manhole cover, and means for securing said stud to the manhole cover, including an elongate rigid bar having a length approximating the diameter of a manhole cover, said stud being affixed to the bar approximately mid-way along the length of the bar, and said bar having a pair of depending hook-like protuberances depending therefrom for engaging recesses in the manhole cover for lifting the cover.