The invention discloses a pneumatic-hydraulic jack which comprises a base. An oil cylinder, a valve body, an oil pump and an oil tank are mounted on the base. A movable handle is mounted at the tail of the oil tank. An air valve is mounted on the movable handle. Specific ribs are adopted by the oil cylinder, and abrasion-resisting copper bands are designed on the oil cylinder in an assisting mode. The annular ribs are arranged on all cylinder bodies of the hydraulic cylinder and covered with the abrasion-resisting copper bands, and therefore the different cylinder bodies are in close contact, the abrasion resistance is good, and the cylinder scoring phenomenon is avoided.
Pneumatic-hydraulic jack
2016-01-27
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 |