Proportioning valve

Claim 2

A proportioning valve comprising a valve block containing a chamber with inlet and outlet openings in communication therewith, a valve element in the chamber containing a passage, one end of which is adapted to communicate with the inlet opening and the other end of which is adapted to communicate with the outlet opening, said valve element being movable in the chamber to move said one end transversely of said inlet opening, said other end remaining constantly in communication with said outlet opening throughout movement of the valve element, an orifice plate containing an orifice of elongate configuration in communication with said inlet opening, and means supporting the orifice plate over said inlet opening and in valving relation with said valve element for movement transversely of the axis of the inlet opening and for rotation about said axis.

Claim 3

In a control system embodying a proportioning valve having a variable orifice, according to claim 1, a source of fluid pressure and a restrictor having an inlet port to which fluid from the source is connected, said restrictor having two ports in communication with the fluid pressure in the restrictor, one of which is connected to said proportioning valve so that adjustment of said proportioning valve varies the pressure at the other port.

Claim 4

In a control system according to claim 2 wherein the restrictor comprises a block containing a longitudinal passage closed at one end and open at the other, diametrically arranged ports near each end of the passage, a threaded plug screwed into the open end of the passage and eXtending longitudinally toward the closed end, said plug containing an axial passage closed at the end adjacent the open end of the block and open at the other end, said plug having a portion of smaller diameter than the interior of the passage in the block in communication with the ports at that end of the block, and a small diameter orifice extending through the reduced portion into the passage within the plug.

Claim 5

A proportioning valve comprising a valve block containing an elongate chamber with an inlet opening in one of the longitudinal sides and the cutlet opening in one of the ends, an elongate valve element in the chamber containing a port in one side and a port in one end, said ports being connected through the valve element and said valve element being movable in the chamber to move the port at the side relative to the inlet opening, means yieldably holding the valve element at the other end of the chamber in which position the port in its side is displaced relative to the inlet opening in the chamber, means operable to move the valve element in the chamber to bring said port in the side into varying degrees of registration with the inlet opening in the chamber, an orifice plate in valving relation with said valve element and containing an elongate orifice in communication with said inlet opening, and means mounting the orifice plate for movement across said inlet opening in the chamber and for rotation about the axis of said inlet opening.

Claim 6

A proportioning valve comprising a valve block containing an elongate chamber with an inlet opening in one of the longitudinal sides and the cutlet opening in one of the ends, an elongate valve element in the chamber containing a port in one side and a port in one end, said ports being connected through the valve element and said valve element being movable in the chamber to move the port at the side relative to the inlet opening, means yieldably holding the valve element at the other end of the chamber in which position the port in its side is displaced relative to the inlet opening in the chamber, means operable to move the valve element in the chamber to bring said port in the side into varying degrees of registration with the inlet opening in the chamber, an orifice plate in valving relation with said valve element and containing an elongate orifice in communication with said inlet opening, and means mounting the orifice plate for movement across said inlet opening in the chamber and for rotation about the axis of said inlet opening.

Claim 7

A proportioning valve comprising a valve block containing an elongate chamber, a circular opening entering the chamber from one side and an opening entering the chamber from one end, an elongate valve element in the chamber movable longitudinally therein relative to the circular opening, said valve element containing ports at one side and at one end which are connected through the valve element and adapted to be placed in communication with said side opening, an annular support rotatably mounted in said side opening for rotation about the axis of said side opening and perpendicular to said circular opening, said annular support containing an eccentric circular opening through it, a hollow manifold of circular cross section mounted in the annular support with one end adjacent the chamber for rotation about an axis at its center parallel to the axis of the side opening, and an orifice plate containing an elongate orifice in communication with said side opening and mounted at the inner end of the manifold for rotation therewith and in valving relation with said valve element, rotation of the manifold effecting rotation of the orifice relative to the port in the side of the valve element and rotation of the annular support effecting movement of the orifice transversely of the port in the side of the valve element.

Claim 8

A proportioning valve comprising a valve block containing an elongate chamber, a circular opening entering the chamber from one side and an opening entering the chamber from one end, an elongate valve element in the chamber movable longitudinally therein relative to the circular opening, said valve element containing ports at one side and at one end which are connected through the valve element and adapted to be placed in communication with said side opening, an annular support rotatably mounted in said side opening for rotation about the axis of said side opening and perpendicular to said circular opening, said annular support containing an eccentric circular opening through it, a hollow manifold of circular cross section mounted in the annular support with one end adjacent the chamber for rotation about an axis at its center parallel to the axis of the side opening, and an orifice plate containing an elongate orifice in communication with said side opening and mounted at the inner end of the manifold for rotation therewith and in valving relation with said valve element, rotation of the manifold effecting rotation of the orifice relative to the port in the side of the valve element and rotation of the annular support effecting movement of the orifice transversely of the port in the side of the valve element.

Claim 9

A proportioning valve according to claim 5, wherein the chamber is rectangular in cross section and the valve element is of corresponding rectangular section so as to be slidable in the chamber, said valve element containing an axial passage open at one end and closed at its other end, said open end constituting the port at said one end and said port at the side being situated intermediate the ends and being transversely elongate.

Claim 10

A proportioning valve according to claim 5, comprising an arm fixed to the annular support for effecting its rotation about its axis to vary the range of temperature and an arm fixed to the manifold for effecting its rotation about its axis to vary the temperature level within a given temperature range.

Claim 11

A proportioning valve according to claim 5, wherein a spring is mounted in the chamber between the end containing the outlet opening and the port at the end of the valve element, said spring normally holding the valve element engaged with the opposite end of the chamber, said block containing at its opposite end an opening coinciding with the longitudinal axis of the valve element, and a rod mounted in the opening with one end engaged with the valve element and the other end protruding from the block.

Claim 12

A proportioning valve according to claim 5, comprising an arm mounted on the annular support radial to its axis for effecting rotation of the annular support about its axis and an arm on the manifold radial to its axis for effecting rotation of the manifold about its axis.

Claim 13

A proportioning valve according to claim 9, wherein each arm contains a noncircular opening adapted to fit into a correspondingly noncircular portion of the annular support and manifold respectively.

Claim 14

A proportioning valve according to claim 9, comprising a scale associated with each arm, each scale being calibrated to indicate the relative positions of the openings in the valve element and the orifice plate to each other.

Claim 15

A proportioning valve according to claim 5, wherein a flexible conductor is connected to the manifold through which pressure is admitted to the manifold.