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. 28, 2004
Filed:
Dec. 22, 2003
John Michael Cotte, New Fairfield, CT (US);
Kenneth John McCullough, Fishkill, NY (US);
Wayne Martin Moreau, Wappingers Falls, NY (US);
John P. Simons, Wappingers Falls, NY (US);
Charles J. Taft, Wappingers Falls, NY (US);
Richard P. Volant, New Fairfield, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A check valve for micro electro mechanical structure devices (MEMS), and in particular pertains to a check valve which is adapted to be employed in connection with micro electro mechanical structure devices which are intended to be employed with supercritical fluids constituting working fluids. In a preferred embodiment, the check valve is equipped with a bypass channel including a freely moveable plug structure which, in the open position of the valve enables the ingress of supercritical fluids under high superatmospheric pressures, and subsequent to the filling of the system, let down to atmospheric pressure, causes the plug to be moved into a permanent valve-closed position.