skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Motor-driven screwing and transporting tool for reactor pressure vessel head retaining fastenings

Abstract

The invention concerns a motor-driven screwing and transporting tool for tightening or loosening the threaded studs and associated tightening nuts of the head bolting of pressure vessels. After the tightening nuts are loosened or before they are tightened, the weight of the studs is taken over by rotating bearings that can be lifted, so that the studs with their tightening nuts can be screwed in or out, the screw threads of the studs being thus weight-relieved. The invention is intended primarily for nuclear reactor pressure vessels. 21 claims, 6 figures.

Inventors:
Publication Date:
OSTI Identifier:
7279326
Patent Number(s):
US 4047456
Assignee:
Kraftwerk Union AG
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 17 Dec 1974, German, Federal Republic of (F.R. Germany)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; CLOSURES; FASTENING; PRESSURE VESSELS; FASTENERS; POWER REACTORS; REMOTE CONTROL; CONTAINERS; CONTROL; FABRICATION; JOINING; REACTORS; 220200* - Nuclear Reactor Technology- Components & Accessories

Citation Formats

Scholz, M. Motor-driven screwing and transporting tool for reactor pressure vessel head retaining fastenings. United States: N. p., 1977. Web.
Scholz, M. Motor-driven screwing and transporting tool for reactor pressure vessel head retaining fastenings. United States.
Scholz, M. 1977. "Motor-driven screwing and transporting tool for reactor pressure vessel head retaining fastenings". United States.
@article{osti_7279326,
title = {Motor-driven screwing and transporting tool for reactor pressure vessel head retaining fastenings},
author = {Scholz, M},
abstractNote = {The invention concerns a motor-driven screwing and transporting tool for tightening or loosening the threaded studs and associated tightening nuts of the head bolting of pressure vessels. After the tightening nuts are loosened or before they are tightened, the weight of the studs is taken over by rotating bearings that can be lifted, so that the studs with their tightening nuts can be screwed in or out, the screw threads of the studs being thus weight-relieved. The invention is intended primarily for nuclear reactor pressure vessels. 21 claims, 6 figures.},
doi = {},
url = {https://www.osti.gov/biblio/7279326}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 13 00:00:00 EDT 1977},
month = {Tue Sep 13 00:00:00 EDT 1977}
}