A bottle jack may be manufactured differently or converted (retro-fitted) by replacing a conventional shaft in a main lift piston to be inserted and removed, at will, without tools. The threads in the main lift piston may remain or be removed. A yoke or other head is fitted to provide registration, horizontal restraint, or both against a lifted object, component, or surface to prevent sliding off the head in use. In a smooth-walled-shaft embodiment, a set of risers (spacers, adjusters, trims, or shims) provide an extension height of the shaft, elevating the head with respect to the piston prior to beginning to lift the hydraulic piston.
TILT-SAFE, HIGH-CAPACITY, BOTTLE JACK SYSTEM AND METHOD
2017-03-09
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 |