The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1994
Filed:
Jan. 19, 1993
Siegfried Heiermann, Waltrop, DE;
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.