Power unit that can be telescopically lengthened or shortened and performs linear movement, and includes cylindrical parts moving telescopically within each other. The cylindrical parts are equipped with at least external or internal threads to form a power unit that can be lengthened or shortened when the parts are being rotated in relation to each other. At least one cylindrical part is locked to be non-rotating or locked to rotate differently than a last cylindrical part to which a rotating producing movement to the power unit is arranged. The cylindrical parts are made of plastic and the inner diameter of the part having the smallest diameter is over 25% of the useful height produced by the smallest cylindrical part.
Telescopically lenghtening/shortening power unit
2016-10-18
Patent
Electronic Resource
English
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |