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:
Oct. 29, 2002
Filed:
Jul. 05, 2001
Richard Allan London, Aargau, CH;
Alstom Power N.V., Amsterdam, NL;
Abstract
A turbine disc for carrying turbine blades is rotatable about a central axis and has a circumferentially extending peripheral face divided into two side face strips by a circumferentially extending root slot. For the greater part of its circumferential length opposite sides of the root slot are parallel. But at at least one location arcuate bights of opposite curvature are formed opposite to one another to form a load slot through which a root of a turbine blade can be introduced into the radially innermost part of the root slot. The arcuate bights have the same radius of curvature and may be arcs of the same circle. On each of two opposite sides of the load slot is a respective shadow slot. One shadow slot is formed by oppositely disposed arcuate bights, and the other shadow slot is formed by oppositely disposed arcuate bights. The radius of curvature of each bight of the shadow slot is greater than that of the bights of the load slot and can be at least twice that of the bights of the load slot.