A manhole cover lifting tool 10, comprising: an elongate body 11 and a shaft 14, wherein the shaft is arranged to slide relative the body. The tool further comprises: coupling means for slidably coupling a proximal region of the shaft with the body; and means 19 disposed at a distal region of the shaft for detachably coupling the shaft with a manhole cover. The shaft is restricted to slide through a pre-defined range along the body such that, in use, an operator may cause the body to slide with respect to the shaft within this range. For example, the shaft may be coupled to a manhole cover, and the body may be raised rapidly through the permitted slide range. Upon reaching the limit of this range, the body and shaft impact upon each other to generate an upward force on the manhole cover. This sudden impact may act to dislodge any debris positioned between the manhole cover and its surrounding frame, and further to remove the manhole cover from the frame.
Manhole cover lifting tool
2017-07-12
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 |