Sprayer technology

A fluid sprayer adapted to connect to a fluid supply, the fluid sprayer having a proximal, first end for connection to the fluid supply and a distal, second end from which fluid is sprayed, comprising:

• a tubular, cylindrical and elongated base member having a proximal first end and a distal second end, the base member having an outer wall with an exterior surface and surrounding an interior lumen open at the first end for communicative connection to the fluid supply, the interior lumen extending to the second end of the base member, the second end of the base member having four fluid egress apertures separated by radial members, the interior lumen of the base member having a tapered first portion extending from the open first end of the base member, and a cylindrical second portion extending from the first portion to the fluid egress apertures, the base member further having a cylindrical post member disposed centrally within the fluid egress apertures and disposed outwardly from the second end of the base member, the fluid egress apertures surrounding the post member and permitting fluid flow outwardly from the interior lumen, the post member having a predetermined outside diameter and a predetermined length, the outside diameter of the post member being uniform along the entire length of the post member whereby the post member has a cylindrical exterior configuration, the base member outer wall further having a ledge member inset from the exterior surface of the outer wall;
• and
• a short tubular, cylindrical cap member having a proximal, first end and a distal second end, the first end of the cap member being connected, during spraying, to the second end of the base member, the cap member having an outer wall with an exterior surface and surrounding an interior lumen open at the first end of the cap member and communicatively connected to the interior lumen of the base member through the fluid egress apertures, the cap member further having an open spray discharge aperture disposed at the second end of the cap member, fluidically communicatively connected to the cap member interior lumen, the fluid egress apertures, and the interior lumen of the base member, the cap member interior lumen further having:
• a first portion for mating with the exterior surface of the outer wall of the base member whereby the first end of the cap member abuts the ledge member of the base member;
• a tapered second portion fluidically communicatively connected to the fluid egress apertures of the base member,
• a cylindrical third portion extending from the tapered second portion,
• a cylindrical fourth portion extending from the cylindrical third portion, the cylindrical fourth portion having a diameter less than that of the cylindrical third portion;
• wherein the tapered second portion, the cylindrical third portion and the cylindrical fourth portions are each formed of a plurality of rectilinear walls;
• wherein the cylindrical fourth portion rectilinear walls are separated at 120 degrees;
• further comprising a terminal tapered, fifth portion extending from the cylindrical fourth portion to the spray discharge aperture;
• and
• wherein the entire post member of the base member is disposed in a space defined by the tapered second portion and the cylindrical third portion of the cap member interior lumen, the diameter of the post member of the base member being less than the diameter of the cylindrical third portion of the cap member lumen and the length of the post member being equal to a combined length of the tapered second and cylindrical third portions of the cap member interior lumen, whereby fluid flowing outwardly from the fluid egress apertures enters a tortuous distal fluid flow path formed between the post member and the rectilinear walls of the tapered second, cylindrical third, and cylindrical fourth portions of the cap member interior lumen, which aerosolizes fluid discharged from the spray discharge aperture.

A liquid sprayer adapted to connect to a fluid supply syringe for delivering medicaments and vaccines to animals and humans, the liquid sprayer having a proximal, first end for connection to the fluid supply and a distal, second end from which fluid is sprayed, comprising:

• A. a tubular, cylindrical and elongated base member having a proximal first end and a distal second end, the base member having:
• an outer wall with an exterior surface and surrounding an interior lumen open at the first end of the base member for communicative connection to the fluid supply syringe, the interior lumen extending to the second end of the base member, the second end of the base member having a plurality of fluid egress apertures separated by at least one radial member,
• the interior lumen of the base member having a tapered first portion extending from the first end of the base member, and a cylindrical second portion extending from the first portion to the plurality of fluid egress apertures,
• the base member further having a cylindrical post member disposed centrally within the plurality of fluid egress apertures and at the second end of the base member extending outwardly, the post member having a predetermined length and a predetermined outside diameter, the outside diameter being uniform throughout the entire length of the post member whereby the post member has a cylindrical exterior configuration, the base member outer wall further having a ledge member inset from the exterior surface of the outer wall, the fluid egress apertures surrounding the post member and permitting fluid flow outwardly from the interior lumen,
• the cylindrical second portion further having a diameter less than a diameter of the tapered first portion, whereby the change from tapered to cylindrical geometry and the reduction in diameter along the interior lumen of the base member reduces a residual volume of fluid flow throughput from the fluid supply connected at the first end of the base member towards the plurality of fluid egress apertures;
• and
• B. a short, tubular, cylindrical cap member having a proximal first end and a distal second end, the cap member having a length less than one half a length of the base member, the first end of the cap member being fixedly connected, during spraying, to the second end of the base member, the cap member having an outer wall with an exterior surface and surrounding an interior lumen open at the first end of the cap member and communicatively connected to the interior lumen of the base member through the plurality of fluid egress apertures, the cap member further having an open spray discharge aperture disposed at the second end of the cap member, the spray discharge aperture being fluidically communicatively connected to the interior cap member lumen, the plurality of fluid egress apertures, and the base member lumen, the interior cap member lumen further having:
• i. a first portion for mating with the exterior surface of the outer wall of the base member, whereby the first end of the cap member abuts the ledge member of the base member,
• ii. a tapered second portion fluidically communicatively connected to the plurality of fluid egress apertures of the base member, and
• iii. a cylindrical third portion extending from the tapered second portion of the cap member to the spray discharge aperture,
• iv. a cylindrical fourth portion extending from the third portion of the cap member, the fourth portion having a diameter less than that of the third portion of the cap member;
• and
• v. a terminal tapered, fifth portion extending from the cylindrical fourth portion of the cap member to the spray discharge aperture, the fifth portion having a diameter less than a diameter of the fourth portion;
• the entire cap member remaining connected to the base member during use;
• wherein the tapered second portion of the cap member, the cylindrical third portion of the cap member, and the cylindrical fourth portion of the cap member are each formed of a plurality of rectilinear walls;
• wherein the cylindrical fourth portion rectilinear walls are separated at 120 degrees;
• wherein the cap member further comprises an inwardly tapered region disposed on an exterior of the second end of the cap member surrounding the spry discharge aperture;
• C. wherein the entire post member of the base member is disposed in a space defined by the tapered second portion and cylindrical third portion of the interior cap member lumen, the diameter of the post member of the base member being less than the diameter of the cylindrical third portion of the cap member lumen and the length of the post member being equal to a combined length of the tapered second and cylindrical third portions of the cap member lumen, whereby fluid flowing outwardly from the fluid egress apertures enters a tortuous distal fluid flow path formed between the post member and the rectilinear walls of the tapered second, cylindrical third, and cylindrical fourth portions of the interior cap member lumen, which aerosolizes fluid discharged from the spray discharge aperture;
• and
• D. wherein the base member has a luer lock fitting for connection to the fluid supply syringe.