초록 ▼

An energy-recycling scissors lift includes a platform, base and a pair of scissors linkages, each having a first and second scissors legs. One end of each second scissors leg is pivotally attached to the base and the other end translations along the platform. One end of each first scissors leg is pi

An energy-recycling scissors lift includes a platform, base and a pair of scissors linkages, each having a first and second scissors legs. One end of each second scissors leg is pivotally attached to the base and the other end translations along the platform. One end of each first scissors leg is pivotally attached to the platform and the other end translates along the base. A bridge structure connects each of the second scissors legs together. A sealed gas cylinder, attached to the base and the bridge structure, moves the platform to an extended position above the base. Energy is stored in the sealed gas cylinder as the platform and supported object descends to a retracted position. A compensating device is attached to the scissors lift to compensate for the overforce caused by the sealed gas cylinder. One form of the compensating device adjusts the position of the sealed gas cylinder to vary the force exerted on the platform. Other compensating devices are equalizing springs and spring reels. The scissors lift includes a device for adjusting the maximum height of the platform and a shipping boss that permits the scissors lift to be compacted for shipping.

대표청구항 ▼

An energy-recycling scissors lift for raising and lowering an article comprising: a lower support member and upper support member, said upper support member being adapted for vertical motion between a relatively retracted position and a relatively extended position above said lower support member, s

An energy-recycling scissors lift for raising and lowering an article comprising: a lower support member and upper support member, said upper support member being adapted for vertical motion between a relatively retracted position and a relatively extended position above said lower support member, said upper support member being adapted to hold the article; a scissors linkage including a first and second scissors leg, said first scissors leg having one end that is pivotally connected to said upper support member and another end that translates along said lower suport member while in operation, said second scissors leg having one end that is pivotally connected to said lower support member and another end that translates along said upper member while in operation; attachment-structure means secured to said second scissors leg; a sealed gas cylinder hasving a first end that is pivotally fixed to said attachment-structure means and a second end that is pivotally attached to said lower support member, said sealed gas cylinder being adapted for storing energy when the article and said upper support member is lowered to a retracted position and for moving said upper support member and the article upwardly from said retracted position toward said extended position; and means for compensating for the force exerted on said upper support member by said sealed gas cylinder.