초록 ▼

A spool having an elongated barrel has a strap supported at one end at a bottom flange on the barrel with the strap passing upwardly therethrough out of the upper end thereof. The strap is removably attached to the bottom flange. A handle is affixed to the strap portion which extends beyond the uppe

A spool having an elongated barrel has a strap supported at one end at a bottom flange on the barrel with the strap passing upwardly therethrough out of the upper end thereof. The strap is removably attached to the bottom flange. A handle is affixed to the strap portion which extends beyond the upper end of the spool. A rigid frame having an upright portion is affixed to a base supported by casters. The frame has a member rigidly affixed to and transversely extending from the upper end of the upright portion which overhangs the spool. A lever having a transverse portion near one end is pivotally connected at the distal end of the transverse portion to the frame member. An arm is pivotably secured at one end to the upright portion and at the other end is engageable with the spool handle. A link is pivotably connected between said arm and the transverse portion to provide a toggle linkage. A downward force applied to the end of the lever serves to lift the arm and the spool by means of the engagement between the arm and the handle whereas an upward force lowers the spool. The toggle linkage serves to lock the spool in the lifted position.

대표청구항 ▼

A manually operable lifting mechanism comprising a supporting frame having a horizontal base portion provided with an upright portion and a horizontal supporting arm portion rigidly secured at one end to the upper end of said upright portion to overhang said base portion, a lifting lever disposed ab

A manually operable lifting mechanism comprising a supporting frame having a horizontal base portion provided with an upright portion and a horizontal supporting arm portion rigidly secured at one end to the upper end of said upright portion to overhang said base portion, a lifting lever disposed above said supporting arm portion and being pivotally connected at one end to the outer end portion of said supporting arm portion for swinging movement between first and second positions, said second position disposing said lever above and in substantial parallelism with said supporting arm portion and said first position disposing said lever above said supporting arm portion at an angle thereto, a load-lifting arm pivotally connected at one end to said upright portion beneath said supporting arm portion in substantial parallelism with the latter to extend substantially horizontally, and means connecting said lifting lever to said pivoted arm at a location spaced from the distal end of said pivoted arm for swinging said pivoted arm upwardly and downwardly when said lifting lever is swung between its first and second positions, respectively.