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:
Dec. 21, 1993
Filed:
Dec. 16, 1992
Siegfried Heiermann, Waltrop, DE;
Horst-Werner Oehler, Duisburg, DE;
Abstract
Apparatus employs a device for automatically threading and unthreading studs into tapped bores of a pressure vessel containing nuclear fuel to detach or fit a cover thereto. The apparatus also employs a device with a carrier ring supporting piston and cylinder units for tensioning the studs while nuts are fitted thereon. The stud threading device is supported on a carriage displaceable along a circular track to access each stud in turn. The stud threading device has a drive member, such as a tube or rod, which is driven by a rotary drive as well as a reciprocating drive. At the lower end the drive member has a coupler which fits onto a coupler at the upper end of each stud. The couplers on the studs take the form of bayonette-type fittings with U-shaped grooves for receiving locking projections on the coupler of the drive member to establish a connection resistant to tension and relative rotation.