Gyratory crusher with hydraulic means for lifting the upper part of the housing from the lower part

Claim 1

A gyratory crusher, comprising a. a housing which includes a lower member and an upper member, b. at least partly co-extensive radially outwardly projecting flanges on said lower and upper members, c. releasable fastening means fixedly securing said flanges to each other, d. a crusher lining secured to the inner side of said upper housing member, e. a crusher cone mounted in said lower housing member for crushing cooperation with said crusher lining by wobbling movement in relation thereto, f. at least three circumferentially spaced hydraulic lifting means operatively connected with said housing members for controllably lifting said upper housing member from said lower housing member upon release of said fastening means, each of said hydraulic lifting means including a cylinder element and a piston element reciprocably mounted in said cylinder element, g. one of said elements being releasably secured in an opening in one of said flanges and accessible and removable from the side of said one flange facing away from the other flange, and h. the other one of said cylinder and piston elements being engageable with said other flange.