Brooks Instrument, LLC

Emerson Electric Company

Brooks Instruments, LLC

Walter Dennis Robertson, Iii

Jay J Mendelson

Joseph C Dille

Anthony Kehoe

Jeffrey L Whiteley

Stephen R Kramer

Todd Berger

Thomas John McNichols

The disclosed embodiments include a pressure balance valve that solves one or more problems associated with existing designs. For example, in one embodiment, a pressure balancing valve assembly is disclosed that provides a low cost frictionless assembly that is constructed to not seal the leak path between an inlet port and an outlet port. Instead, this leak path is minimized with small angle tapered plunger and a precision bored annulus to provide a defined area for the pressure drop to occur and to limit the flow from the inlet to the outlet.

Pressure balanced valve

A magnetic core () is adapted for a solenoid valve (). The magnetic core () includes a base (), a stem (), and an inner cavity (). The inner cavity () is formed in a portion of the base () and in a portion of the stem (). The inner cavity () defines a thin wall () of the stem (). The magnetic core () further comprises a non-magnetic pressure retaining sleeve (). The non-magnetic pressure retaining sleeve () is arranged in such a way that either the non-magnetic pressure retaining sleeve surrounds at least a portion of the thin wall of the stem or that at least a portion of the thin wall portion surrounds the non-magnetic pressure retaining sleeve.

Pressure retaining sleeve

The present invention relates to a system, method, and computer program product for determining the flow rate of a fluid. The system, method, and computer program product generate a thermal sensor based mass flow rate for the fluid, where the thermal sensor based mass flow rate is determined at least in part from the thermal sensor signal (). The system, method, and computer program product generate a pressure sensor based mass flow rate for the fluid, wherein the pressure sensor based mass flow rate is determined at least in part from the pressure sensor signal (). The system, method, and computer program product generate at least one calibration factor (&#x3c8;) using the thermal sensor based mass flow rate and the pressure sensor based mass flow rate. The system, method, and computer program product may generate a calibrated pressure sensor based mass flow rate by using the at least one calibration factor (&#x3c8;) to modify the pressure sensor based mass flow rate. The system, method, and computer program product may generate a calibrated thermal sensor based mass flow rate by using the at least one calibration factor (&#x3c8;) to modify the thermal sensor based mass flow rate.

System, method and computer program for determining fluid flow rate using a pressure sensor and a thermal mass flow sensor

A flow control valve includes an inlet and an outlet through which fluid enters and exits the valve. A valve plunger has a guide spring attached thereto, such that the guide spring is situated between the plunger and a valve orifice. The plunger, and thus the guide spring, is movable relative to the orifice to control fluid flow through the valve. The guide spring and the orifice surface adjacent the guide spring define coplanar surfaces that seal against each other when the valve is closed.

Valve assembly

An adjustable pivot valve assembly (10) for use in a fluid flow system (S). A valve body (12) has a fluid flow path therethrough and includes an inlet (14), an outlet (16), and a valve orifice (18) formed intermediate the inlet and outlet. A valve seat (28) is mounted for movement relative to the orifice to open and close the fluid path. The valve seat is attached to a valve stem (30). A solenoid assembly (50) is supplied an input from a sensor/control unit (S) to effect movement of the valve seat. What would otherwise be a linear movement of the valve stem and valve seat is translated into movement of a plunger (78) interconnected with the valve stem to produce a movement which is orthogonal to a longitudinal axis of the valve stem. This translated movement causes the valve seat to pivotally move about the orifice to effect an opening of the orifice for fluid to flow between the inlet and outlet. The valve stem, plunger, and a pole piece (56) of the of the solenoid comprise a lever arm the length of which is adjustable to vary the force required to effect the pivoting movement. A spring arrangement (86a, 86b) centers the valve stem and seat, and a spring (46) biases the valve seat toward a position closing the orifice. Stops (90a, 90b) located on opposite sides of the plunger, at the end of the arm remote from the valve seat, limit the orthogonal movement of the valve stem.

Pivoting valve assembly

An pivot valve assembly (1310) for use in a fluid flow system (S). A valve body (1312) has a fluid flow path therethrough and includes an inlet (1314), an outlet (1316), and a valve orifice (1318) formed intermediate the inlet and outlet. A valve member (1332) is mounted for movement relative to the orifice to open and close the fluid path. A solenoid assembly (1362) is supplied an input from a sensor/control unit (S) to effect movement of the valve member. The solenoid acts on a lever arm (1352) which is pivotally mounted so what would otherwise be a linear movement of the lever arm becomes a rotary movement. A ball (1342) seated on a valve stem (1336) of the valve member is contacted by the lever arm and moved thereby as the lever arm moves. This produces a pivotal movement of the valve member into a position opening the orifice and allowing fluid flow through the valve assembly.

Growing community of inventors

Harleysville, PA, United States of America

Walter Dennis Robertson, Iii