Mixing tap

Claim 2

A mixing valve for hot and cold water comprising a body having a substantially cylindrical bore therein, an axially elongated control spindle rotatably mounted within and coaxial with said bore, said body having spaced hot and cold water inlet apertures communicating with the bore and spaced hot and cold water outlet apertures communicating with the bore and spaced from said hot and cold water inlet apertures, a pair of axially spaced O-rings extending about said spindle in sealing engagement with said bore, each said O-ring disposed in a plane arranged at an acute angle to the axis of said spindle, one of said O-ring located on said spindle opposite said hot water inlet and extending in the direction of the axis of said spindle for at least the axial extend of said hot water inlet and the other said O-ring located on said spindle opposite said cold water inlet and extending in the direction of the axis of said spindle for at least the axial extend of said cold water inlet so that as said spindle is rotated within said bore said O-rings sweep across the respective inlets, said spindle is cutaway for a portion of its axial length adjacent each said O-ring, means for forming a seal between said spindle and said bore intermediate said O-rings for preventing any mixing of the hot and cold water flowing into said bore through said body, said body and control spindle forming separate hot and cold water passageways through said body and bore to said hot and cold water outlet apertures, said mixing valve arranged so that by rotation of said control spindle and said O-rings can be positioned relative to the inlet apertures to permit the establishment of a flow of at least one of hot and cold water to the respective outlet apertures.

Claim 3

A mixing valve, as set forth in claim 1, wherein said body comprises a body member having an opening therethrough a removable sleeve positioned in closely fitting relationship with the opening and forming said cylindrical bore, and means for effecting a seal between said body member and said sleeve for preventing any leakage of the hot and cold water flowing through the body member into and out of said bore therethrough.

Claim 4

A mixing valve, as set forth in claim 1, wherein said control spindle comprises an axially elongated first part arranged to be positioned within said body and an axially elongated second part extending axially from said first part exteriorly of said body, said second part arranged to receive means for rotating said control spindle, a portion of said first part disposed in closely fitting relationship with said bore in said body, said first part is cutaway for a portion of its axial length intermediate its ends for providing an annular open space within said bore intermediate said O-rings; an annular septum extending transversely of said control spindle and positioned intermediate the ends of said cutaway portion for dividing said cutaway portion into a pair of separate annular chambers, said septum extending into sealing engagement with the interior surface of said bore, and means engageable with said first part of said control spindle for limiting the extend of rotational movement thereof within said bore.

Claim 5

A mixing valve for hot and cold water comprising a body having a substantially cylindrical bore therein, an axially elongated control spindle rotatably mounted within and coaxial with said bore, said body having spaced hot and cold water inlet apertures communicating with said bore and spaced hot and cold water outlet apertures communicating with said bore and spaced from said inlet apertures, said outlet apertureS being arranged intermediate said inlet apertures and said hot water inlet aperture being positioned adjacent said hot water outlet aperture and said cold water inlet aperture being positioned adjacent said cold water outlet aperture, a pair of axially spaced O-rings extending about said spindle in sealing engagement with said bore, each said O-ring disposed in a plane arranged at an acute angle to the axis of said spindle, one of said O-rings located on said spindle opposite said hot water inlet and extending in the direction of the axis of said spindle for at least the axial extent of said hot water inlet and the other said O-ring located on said spindle opposite said cold water inlet and extending in the direction of the axis of said spindle for at least the axial extent of said cold water inlet so that as said spindle is rotated within said bore said O-rings sweep across the respective inlets, said spindle is cutaway for a portion of its length between said o-rings, an annular septum secured to and extending transversely of said control spindle divides the cutaway portion of said spindle into separate annular chamber, said septum disposed in sealing engagement with said bore for preventing any mixing of the hot and cold waters flowing into the annular chambers formed by the cutaway portions of said control spindle, said body and control spindle forming separate hot and cold water passageways through said body and bore to said hot and cold water outlet apertures, and said mixing valve arranged so that by rotation of said control spindle said O-rings can be positioned relative to the inlet apertures to permit the establishment of a flow of at least one of hot and cold water to the respective outlet apertures.

Claim 6

A mixing valve for hot and cold water comprising a body having a substantially cylindrical bore therein, an axially elongated control spindle rotatably mounted within and coaxial with said bore, said body having spaced hot and cold water inlet apertures communicating with said bore and spaced hot and cold water outlet apertures communicating with said bore and spaced from said inlet apertures, said outlet apertureS being arranged intermediate said inlet apertures and said hot water inlet aperture being positioned adjacent said hot water outlet aperture and said cold water inlet aperture being positioned adjacent said cold water outlet aperture, a pair of axially spaced O-rings extending about said spindle in sealing engagement with said bore, each said O-ring disposed in a plane arranged at an acute angle to the axis of said spindle, one of said O-rings located on said spindle opposite said hot water inlet and extending in the direction of the axis of said spindle for at least the axial extent of said hot water inlet and the other said O-ring located on said spindle opposite said cold water inlet and extending in the direction of the axis of said spindle for at least the axial extent of said cold water inlet so that as said spindle is rotated within said bore said O-rings sweep across the respective inlets, said spindle is cutaway for a portion of its length between said o-rings, an annular septum secured to and extending transversely of said control spindle divides the cutaway portion of said spindle into separate annular chamber, said septum disposed in sealing engagement with said bore for preventing any mixing of the hot and cold waters flowing into the annular chambers formed by the cutaway portions of said control spindle, said body and control spindle forming separate hot and cold water passageways through said body and bore to said hot and cold water outlet apertures, and said mixing valve arranged so that by rotation of said control spindle said O-rings can be positioned relative to the inlet apertures to permit the establishment of a flow of at least one of hot and cold water to the respective outlet apertures.

Claim 7

A mixing valve, as set forth in claim 4, wherein said body comprises a body member having an opening therethrough, a removable sleeve positioned in closely fitting relationship with the opening and forming said cylindrical bore, and means for effecting a seal between said body base and said sleeve for preventing any leakage of the hot and cold water flowing through the body member into and out of said bore therethrough.

Claim 8

A mixing valve, as set forth in claim 4, wherein said control spindle comprises an axially elongated first part arranged to be positioned within said body and an axially elongated second part extending axially from said first part exteriorly of said body, said second part arranged to receive means 2 rotating said control spindle, a portion of said first part disposed in closely fitting relationship with said bore in said body, said first part is cutaway for a portion of its axial length intermediate its ends for providing an annular open space within said bore intermediate said O-rings, and means engageable with said first part of said control spindle for limiting the extent of rotational movement thereof within said bore.