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:
Jul. 11, 2000
Filed:
Aug. 31, 1998
David A Gattuso, Deerfield, NH (US);
Anthony R Haba, II, Stratham, NH (US);
Richard D Rhodes, Jr, Somersworth, NH (US);
McCord Winn Textron Inc., Manchester, NH (US);
Abstract
A low energy consumption valve module (16) includes low energy consumption valves (20) having either bimorphs or monomorphs defined by a circular diaphragm (21) carrying one or more piezoelectric discs (22) (23) operative to position a sealing disc (36) for sealing a valve seat (34). In one embodiment the discs are energized across conductive seals (51,52,54,56) and in another embodiment the discs are energized by a pair of flexible conductors (150). A process for making the bimorphs or monomorphs comprises a tape cast process in which ceramic with piezoelectric properties is shaped without machining. A process for making the valve module providing a valve body (200) and valve cover (202) of either laser energy transparent or laser energy absorbent polyimide material that are joined at a line to line contact (210) and sealed upon application of a laser welding beam to the line to line contact between the valve body and the valve cover at the perimeter thereof.