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:
Mar. 07, 2000
Filed:
Jul. 21, 1998
Jeff L Giacomino, Fort Lupton, CO (US);
Bruce M Victor, Fort Lupton, CO (US);
Other;
Abstract
A gas flow proportioning and controlling valve system includes a pressurized air flow source, a flow control valve, first and second latching valves and a control mechanism. The control valve is capable of pneumatic actuation between fully opened and closed positions permitting and preventing gas flow through it and to selected intermediate positions to provide proportionately greater and lesser opening of the control valve and magnitude of pressure and velocity of gas flow through it. The first latching valve is connected to the source, control valve and a vent line and is switchable between an opened condition in which communication of pressurized air flow is only provided therethrough from the source to the control valve and a closed condition in which communication of pressurized air flow is only provided therethrough from the control valve to the vent line. The second latching valve is connected to the vent line from the first latching valve and to atmosphere and is switchable between an opened condition in which communication of pressurized air flow is only provided therethrough from the vent line to atmosphere and a closed condition wherein communication of pressurized air flow is not provided therethrough. The control mechanism is operable to cause selective and separate switching of the latching valves between their respective opened and closed conditions in a coordinated manner which causes pneumatic actuation of the control valve to any selected intermediate position between fully opened and closed positions.