Nozzle assembly

A nozzle insert, for use with a nozzle body including a first locking means and an annular sealing surface, the nozzle insert comprising:

• a nozzle body member;
• a passage extending through the nozzle body member from one end to the other end thereof, which other end has a nozzle outlet;
• a first groove, adjacent the one end of the nozzle body member, for receiving an annular sealing member, and including a frusto-conical bottom surface which extends around the passage and increases in diameter in a direction towards said other end;
• a first annular sealing member located in the first groove, and having an internal diameter, in a rest position, smaller than the smallest diameter of the first groove;
• a second annular groove located between the first groove and the other end of the nozzle insert, and a second sealing member located in the second groove, for forming a seal with the nozzle body to prevent fluid penetrating between the nozzle body and the nozzle insert, between the annular sealing members, wherein the second groove has a larger diameter than the first groove and the second annular sealing member has a rest diameter smaller than the diameter of the second groove;
• and
• second locking means complementary with the first locking means of a nozzle body for engagement therewith, whereby, in use, the nozzle insert can be engaged in the nozzle body, with the first and second locking means retaining the nozzle insert, and with the first sealing member being displaced along the frusto-conical bottom surface and compressed between the first groove and the annular sealing surface, whereby the sealing member both biases the first and second locking means into engagement with one another and forms a seal between the nozzle insert and the nozzle body, and with the second sealing member forming a seal so as to prevent fluid entering between the first and second sealing members.

A nozzle assembly comprising:

• a nozzle body comprising one end adapted for connection to a fluid supply source, a through bore for fluid, an annular sealing surface and a first locking means;
• a nozzle insert comprising a nozzle body member, one end of which is adapted for engagement with the nozzle body and the other end of which includes a nozzle outlet, a through passage for fluid extending from the one end to the nozzle outlet, a first annular groove including a generally frusto-conical annular sealing surface, as a bottom surface of the first groove, which sealing surface is located around the through passage and increases in diameter in a direction towards said other end thereof, a second annular groove, located between the first annular groove and the other end of the nozzle insert, and a second locking means complementary to the first locking means;
• a first resilient annular sealing member mounted in the first groove;
• a second resilient sealing member mounted in the second groove;
• and
• wherein the first and second locking means can be engaged to maintain the nozzle insert and the nozzle body in an engaged position, in which the first annular sealing member is displaced along the frusto-conical sealing surface and expanded radially, and is compressed between the sealing surfaces, whereby the first annular sealing member both maintains a seal between the nozzle body and the nozzle insert and resiliently biases the first and second locking means into engagement with one another, and in which the second sealing member abuts the nozzle body, to prevent fluid entering the nozzle body between the first and second annular sealing members.

A nozzle assembly comprising:

• a nozzle body comprising one end adapted for connection to a fluid supply source, a through bore for fluid, an annular sealing surface and a first locking means;
• a nozzle insert comprising a nozzle body member, one end of which is adapted for engagement with the nozzle body and the other end of which includes a nozzle outlet, a through passage for fluid extending from the one end to the nozzle outlet, a generally frusto-conical annular sealing surface, which is located around the through passage and increases in diameter in a direction towards said other end thereof, and a second locking means complementary to the first locking means;
• a first resilient annular sealing member mountable between the sealing surfaces of the nozzle body and the nozzle insert, and having, in a rest condition, an internal diameter no greater than the smallest diameter of the frusto-conical sealing surface;
• and
• wherein the first and second locking means can be engaged to maintain the nozzle insert and the nozzle body in an engaged position, in which the annular sealing member is displaced along the frusto-conical sealing surface and expanded radially, and is compressed between the sealing surfaces, whereby the sealing member both maintains a seal between the nozzle body and the nozzle insert and resiliently biases the first and second locking means into engagement with one another, wherein the first locking means comprises a pair of first locking projections extending radially inwards and defining first engagement faces and the second locking means comprises a pair of locking projections extending radially outwards and defining second engagement faces for abutting the first engagement faces, and wherein each of the first and second engagement faces is part annular and each second engagement face includes a short step at one end displaced axially to form an end face with another end face being provided at the other end thereof, the end faces serving to retain a corresponding first engagement face in position.

A nozzle assembly comprising:

• a nozzle body, comprising one end adapted for connection to a fluid supply source, a through bore for fluid, a first frusto-conical annular sealing surface which increases in diameter away from said one and towards the other end thereof and a first locking means;
• a nozzle insert comprising a nozzle body member, one end of which is adapted for engagement with the nozzle body and the other end of which includes a nozzle outlet, a through passage for fluid extending from the one end to the nozzle outlet, a second frusto-conical annular sealing surface, which is located around the through passage and increases in diameter in a direction towards said other end thereof, and a second locking means complementary to the first locking means;
• a first resilient annular sealing member mountable between the sealing surfaces of the nozzle body and the nozzle insert;
• and having, in a rest condition, an internal diameter no greater than the smallest diameter of the frusto-conical sealing surface;
• and
• wherein the first sealing surface has a generating angle substantially greater than the generating angle of the second sealing surface, whereby there is relatively little displacement of the first sealing member along the first sealing surface, wherein the first and second locking means can be engaged to maintain the nozzle insert and the nozzle body in an engaged position, in which the annular sealing member is displaced along the first frusto-conical sealing surface and expanded radially, and is compressed between the sealing surfaces, whereby the sealing member both maintains a seal between the nozzle body and the nozzle insert and resiliently biases the first and second locking means into engagement with one another.