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. 10, 2002
Filed:
Nov. 27, 2000
Robert Willem Van Den Berg, Rotterdam, NL;
Paul Vincent Bartels, Wageningen, NL;
Ludo Jean Maria Mathilde Van Schepdael, Herent, NL;
ATO B.V., Wageningen, NL;
Abstract
The invention relates to a high-pressure device ( ) having a cylindrical high-pressure vessel ( ) and prestressing means in order to exert an axial pressure on the vessel. The vessel ( ) can have been formed from a number of layers of composite material, such as glass, carbon or aramide fibers which are oriented in the peripheral direction and are embedded in a matrix of epoxy resin or polyurethane. By applying the axial prestress to the pressure vessel ( ), the tangential stress is distributed more uniformly over the wall thickness of the high-pressure vessel ( ), the stress decreasing at the inside of the wall and increasing at the outside thereof. As a result, the innermost fibers of a high-pressure vessel ( ) made of composite material are subjected to appreciably less stress, which has a beneficial effect on the life of the high-pressure vessel ( ), and all fibers of the wall are utilized effectively. Preferably, the prestressing means comprise a pressure ring ( ) which can be brought into engagement around the pressure-generating piston ( ) with one end face of the high-pressure vessel ( ).