A hoisting crane (1) that comprises a male shaft (2), a female shaft (3), a locking shaft (4), a tightening spring (5), a hoisting arm (6), a diagonal supportive rod (20), a top shoe 81, a bottom shoe 82, a top bearing 91, and a bottom bearing 92. The crane is portable and collapsible and is equipped with an automatic adjusting tightening mechanism that fixes and secures the crane to the work room floor and ceiling using a spring and in a way that the greater the load on the crane, the more the pressure arm increases the tightening force that the crane applies to the work room floor and ceiling.
CRANE WITH AUTOMATIC ADJUSTABLE TIGHTENING MECHANISM
KRAN MIT AUTOMATISCHEM VERSTELLBAREM SPANNMECHANISMUS
GRUE AVEC RÉGLAGE AUTOMATIQUE DU MÉCANISME DE SERRAGE
09.12.2020
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |