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:
Jun. 13, 1989
Filed:
Mar. 16, 1988
Joseph J Bakewell, Boxford, MA (US);
Dynamics Research Corporation, Wilmington, MA (US);
Abstract
An orifice plate and method of fabrication are provided in which the plate is constructed of two electroformed layers of metal. Onto a conductive mandrel a first layer of a first metal is electroformed to provide a support layer having a selected hole pattern. The first layer is then plated with a thick layer of a second metal and removed from the conductive mandrel exposing the bottom surface of the first layer. On the exposed bottom surface, a thin second layer of the first metal is electroformed to produce a pattern of holes of a selected smaller cross section in cooperation with the hole pattern of the first layer of the first metal. The thick layer of the second metal is then etched away, producing a thin metal orifice plate having a pattern of small holes of a selected cross section and supported between the holes by an additional, thicker layer of the same metal.