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:
Sep. 19, 1989
Filed:
May. 19, 1988
Helmut Swars, Bergisch Gladbach, DE;
Interatom GmbH, Bergisch Gladbach, DE;
Abstract
A cylindrical sensor for the sectional expansion of hollow shafts by exerting fluid pressure includes a sensor body to be disposed in a hollow shaft. The sensor body has an end and includes a sensor surface having sections corresponding to sections of the hollow shaft to be expanded. The sensor body has an outer hollow cylinder with substantially radial bores formed therein. The bores discharge partly in the sections of the sensor surface and the bores have inner ends. The sensor body has an inner cylinder onto which the outer hollow cylinder is forced. The outer hollow cylinder has an inner cylindrical surface and the inner cylinder has an outer cylindrical surface. At least one of the cylindrical surfaces has at least two longitudinal grooves formed therein communicating with the inner ends of the radial bores and forming inflow lines and drain lines for pressure fluid extending from the end of the sensor body.