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. 15, 1999
Filed:
Apr. 07, 1997
Applicant:
Inventors:
Assignee:
Taiwan Semiconductor Manufacturing Company, Ltd., Hsin-Chu, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
702 98 ; 340626 ; 137557 ;
Abstract
A modified air activated pressure valve is described, together with a method for its manufacture, that has a pressure sensitive switch located in the inlet chamber and in the outlet chamber. These pressure sensitive switches are preset by the user to output a finite voltage (typically about 5 volts) only when they are exposed to a pressure that exceeeds some value. The outputs of both switches may then be displayed, as needed. Additionally, a display circuit is provided that gives an output signal only when both the inlet and the outlet chambers are at or above their intended pressures.