초록 ▼

A crane having a plurality of telescoping beams for supporting and positioning a camera or the like. The crane includes a counterweight structure which balances the crane about its fulcrum point. As the beams of the crane telescope outward, the movement of the counterweight structure is controlled s

A crane having a plurality of telescoping beams for supporting and positioning a camera or the like. The crane includes a counterweight structure which balances the crane about its fulcrum point. As the beams of the crane telescope outward, the movement of the counterweight structure is controlled so as to move in the opposite direction relative to the fulcrum point to substantially maintain a balanced crane.

대표청구항 ▼

A crane comprising: a fulcrum support; a main boom mounted on said fulcrum support, said main boom having a front end and a rear end; a first beam telescopically extendable from the front end of said main boom; a second beam telescopically extendable from said first beam; a counterweight structure c

A crane comprising: a fulcrum support; a main boom mounted on said fulcrum support, said main boom having a front end and a rear end; a first beam telescopically extendable from the front end of said main boom; a second beam telescopically extendable from said first beam; a counterweight structure connected along the outside of the main boom and telescopically extendable out from the rear end of said main boom; an interconnecting means between said main boom, said first beam, said second beam, and said counterweight structure controlling the relative movements thereof such that as said first beam and said second beam extend in one direction, said counterweight structure extends in the opposite direction thereby substantially maintaining balance about said fulcrum support.