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. 26, 1978
Filed:
Dec. 17, 1976
David H Saunders, Cranfield, GB;
The British Hydromechanics Research Association, Cranfield, GB;
Abstract
A high velocity liquid jet cutting nozzle in which a nozzle member is supported in communicative connection with the outlet end of a high pressure liquid pipe by means of a mounting which is seated in a cup-shaped holder which is connected to the outlet end of the pipe. To provide a coherent, stable jet at liquid pressures of the order of 60,000 psi, the nozzle member is formed from a piece of artificial sapphire, such as a watch or instrument jewel, having a circular aperture diameter of between 0.05mm. and 0.40mm. This aperture is formed with a convergent inlet portion which is a surface of revolution, about the axis of the aperture, of a smooth curved arc, a uniform diameter portion extending tangentially from the inlet portion, and a divergently bevelled outlet portion.