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:
Aug. 02, 2005
Filed:
Apr. 10, 2003
James M. Dalton, Elk River, MN (US);
Donald J. Kasprzyk, Maple Grove, MN (US);
Sybrandus B. V. Munsterhuis, Orono, MN (US);
Patrick W. Schottler, Minneapolis, MN (US);
James M. Dalton, Elk River, MN (US);
Donald J. Kasprzyk, Maple Grove, MN (US);
Sybrandus B. V. Munsterhuis, Orono, MN (US);
Patrick W. Schottler, Minneapolis, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A fluid flow control valve uses a servo valve to control the pressure in a main diaphragm chamber defined by a main diaphragm. The main diaphragm carries a main valve element that assumes either a low flow or a high flow position relative to a valve seat depending on which of two states the servo valve is in. When the servo valve is in the one of the two states creating the low flow position of the main valve element, the main diaphragm chamber pressure is regulated by a pressure divider comprising two flow restrictors in series connection between the inlet and outlet chambers of the valve. When in the other of the two states, the servo valve disables the pressure divider and allows the main diaphragm chamber pressure to reach the outlet pressure. The disclosure shows two versions of the invention. One version of the valve enters its low flow state when the servo valve is closed, and the other when its servo valve is open.