Apparatus for automatically inserting and removing screw-threaded elements into and from tapped bores
AssigneeWestfalia Becorit Industrietechnik GmbH
InventorSiegfried Heiermann
Life of this patent
Estimating the term…
Abstract
Apparatus for automatically inserting and removing screw-threaded elements into and from threaded bores of a pressure vessel to fit or detach a cover employs a screw-clamping device with a carrier ring supporting individual mechanisms for each screw-threaded element. Each mechanism employs a pair of parallel hydraulic piston and cylinder units with their cylinders supported for sliding on a flat surface of the carrier ring and their piston rods linked to a pressure bridge which brace on a shoulder of a screw-threaded sleeve fitted onto the associated screw-threaded element. The entire mechanisms is displaceably adjustable relative to the carrier ring predominantly in a radial direction relative to a common pitch circle for all the screw-threaded elements.
Claims9
An apparatus for use in automatically inserting and removing screw-threaded elements into tapped bores on a common pitch circle, particularly for attaching and detaching a cover of a reactor pressure vessel;
- a screw-clamping device for subjecting the screw-threaded elements to tension, said device comprising a carrier for engaging on the cover and having apertures for receiving the screw-threaded elements, clamping mechanisms each with a pair of hydraulic piston and cylinder units connected to a pressure bridge which is engageable with abutment means on one of the associated screw-threaded elements and mounting means for mounting the mechanisms on the carrier wherein the mounting means includes guides for guiding each mechanism relative to the carrier to permit adjustment of each mechanism radially and around the pitch circle.
Dependencies are inferred from the claim text.