초록 ▼

The present invention relates to a device for pushing and pulling an accessory instrument of a manufacturing plant, such as a clamp for a metallic mould, by means of a chain driven by a hydraulic actuator having a vertical cylinder. One end of the chain is supported by a case which houses the chain.

The present invention relates to a device for pushing and pulling an accessory instrument of a manufacturing plant, such as a clamp for a metallic mould, by means of a chain driven by a hydraulic actuator having a vertical cylinder. One end of the chain is supported by a case which houses the chain. The chain is driven by one of more sprockets engaging the chain at and rotatably supported by a movable part of the cylinder.

대표청구항 ▼

A mechanical jack, comprising a finite chain functioning as thrust and tension element, an elongated case housing said chain, said case having an opening for extension and retraction of said chain therethrough, and cylinder actuator means for driving said chain, wherein: at least one sprocket is dis

A mechanical jack, comprising a finite chain functioning as thrust and tension element, an elongated case housing said chain, said case having an opening for extension and retraction of said chain therethrough, and cylinder actuator means for driving said chain, wherein: at least one sprocket is disposed movably up and down within said case, said cylinder actuator means includes a fluid actuated cylinder having a means movable within said case, and which movable means rotatably supports said at least one sprocket; said chain being trained around the periphery of said at least one sprocket, and engaged therewith, and said chain thereby having upwardly and downwardly extending portions arranged generally vertical and generally parallel to each other and of substantially U-shaped configuration in elevation view.