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US 3,957,073 AGranted
Pressure balancing valve
AssigneeBradley Corporation
InventorThomas G. Barnum
Life of this patent
Estimating the term…
Abstract
A pressure balancing valve has a pair of fluid ducts for hot and cold water, a butterfly type valve is located in each duct, a pressure cavity is provided that is in communication with each duct, and a resilient diaphragm mounted in the cavity converts pressure differential between the ducts into positional displacement of a rod-like pressure plate linkage secured to the butterflies. The butterflies pivot to alter fluid flow in the ducts until substantially equal pressures appear at the outlets of the ducts.
Claims13
A pressure balancing valve comprising:
- a body having two spaced, substantially straight fluid ducts, a cavity intermediate the ducts, guideways leading from each duct into the cavity that are transverse to the ducts, and pressure canals leading from each duct into the cavity that are also transverse to the ducts;
- a pressure sensor including a flexible pressure responsive member dividing the cavity that is mounted for axial movement within said guideways in a direction transverse to said ducts and which extends into each of said fluid ducts;
- and
- a pair of butterflies, each positioned in one of said fluid ducts and cooperatively engaged with said pressure sensor to be moved upon axial movement thereof, such butterflies being upstream from said pressure canals.
1 more element
A pressure balancing valve comprising:
- a body having two spaced fluid ducts, a cavity intermediate the ducts, guideways leading from each duct into the cavity, and pressure canals leading from each duct into the cavity;
- a pressure sensor including a flexible pressure responsive member dividing the cavity that is mounted for axial movement within said guideways and which extends into each of said fluid ducts;
- and
- a pair of butterflies, each positioned in one of said fluid ducts and cooperatively engaged with said pressure sensor to be moved thereby, such butterflies being upstream from said pressure canals and each having a pivoted vane that varies in thickness to present a periphery that has a longer line of contact along its portion upstream from the pivot than along its portion downstream from the pivot.
1 more element
A pressure balancing valve comprising:
- a body having two spaced fluid ducts, a cavity intermediate the ducts, guideways leading from each duct into the cavity, and pressure canals leading from each duct into the cavity,
- a pressure sensor including a flexible pressure responsive member dividing the cavity that is mounted for axial movement within said guideways and which extends into each of said fluid ducts;
- a pair of butterflies, each positioned in one of said fluid ducts and cooperatively engaged with said pressure sensor to be moved thereby, such butterflies being upstream from said pressure canals;
- and
- a cylindrical sleeve inserted in each fluid duct which mounts and houses one of said butterflies.
2 more elements
A pressure balancing valve comprising:
- a body having two spaced apart, substantially parallel fluid ducts defined therein;
- an intermediate cavity formed in said body and communicating with said fluid ducts;
- a pressure sensor linkage mounted for shifting movement within said cavity in a direction transverse to said ducts, said pressure sensor linkage having ends extending into said fluid ducts;
- a resilient diaphragm extending across said intermediate cavity, that lies in a plane substantially parallel to said ducts and connected to said linkage to shift the same;
- and
- a pair of butterflies, each being positioned in a fluid duct and in connection with said pressure sensor linkage, whereby diaphragm movement shifts said linkage to operate said butterflies.
3 more elements
A pressure balancing valve comprising:
- a body having two fluid ducts extending therethrough, each duct having an upstream and downstream end;
- a cavity formed within said body and having a guideway communicating between said cavity and each fluid duct;
- a resilient diaphragm extending across said cavity;
- a rod-like pressure sensor linkage axially movable within said cavity and said guideways which has two pressure plates disposed on opposite sides of said diaphragm and having ends extending into said fluid ducts;
- pressure canals connecting said cavity and interconnecting said fluid ducts, said canals being disposed toward the downstream ends of said fluid ducts;
- and
- a pair of butterflies, each being positioned in a duct toward the upstream end, and connected to one of said ends of said pressure sensor, whereby said diaphragm converts pressure differential into positional displacement by axially shifting said pressure sensor linkage to pivot said butterflies, such that downstream pressures are maintained substantially equal.
4 more elements
A pressure balancing valve comprising:
- a body having two spaced fluid ducts that have straight runs for fluid flow therethrough;
- a cavity intermediate said fluid ducts;
- a canal leading from the straight run of each of said ducts into said cavity and extending crosswise to said fluid ducts;
- a pressure sensor including a flexible pressure responsive member dividing said cavity that is mounted for axial movement in a direction transverse to said fluid ducts and which extends into each of said fluid ducts;
- and
- a pair of butterflies each positioned in the straight run of one of said fluid ducts and cooperatively engaged with said pressure sensor to be moved upon axial movement thereof.
3 more elements
Dependencies are inferred from the claim text.