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. 08, 2009
Filed:
Dec. 18, 2007
Roland Moser, Zurich, CH;
Christopher John Hulme, Wuerenlingen, CH;
Roland Moser, Zurich, CH;
Christopher John Hulme, Wuerenlingen, CH;
Alstom Technology Ltd, Baden, CH;
Abstract
A method for drilling or cutting a pin () surrounded by solid material () includes the use of a water jet tool () having a nozzle () that is arranged at an angle with respect to a main body () of the water jet tool (). The water jet is directed over a portion of the surface of the pin (), and removes that portion thereby fragmenting the pin (). In order to minimise damage to the surrounding material, the portions removed touches the interface between the pin and the surrounding solid material at a minimal number of points and over a minimal extent of the interface. The method is applicable in particular to the removal of pins () used in a press-fit for the securing of blades () on a turbine rotor (). The method facilitates 'in situ' removal of pins within a confined space in a short time and at reduced cost.