Dosage gun

A dosage gun for producing a multi-component material, comprising:

• a housing having a longitudinal bore therein which terminates at one end in an emission nozzle;
• means for selectively discharging components of the multi-component material into said housing longitudinal bore;
• a dosage device held in said housing longitudinal bore for dispensing the components in a predetermined proportion by volume through said emission nozzle, said dosage device comprising:
• at least one hollow needle which is movably mounted in relation to said emission nozzle so that the components of the material are fed along an exterior periphery and through an interior bore, respectively, of said at least one hollow needle and wherein the components are dispensed at said emission nozzle as co-axial streams which flow into each other;
• a dosage needle arranged within said hollow needle, said dosage needle being movable in relation to said hollow needle in order to feed the components of the material to said emission nozzle, and wherein said dosage needle can be rotated in relation to said hollow needle in order to adjust the amount fed to said emission nozzle;
• and,
• wherein said dosage needle has at least one spiral groove which extends, starting from one end, over a predetermined length of the dosage needle, and forms a channel for the feeding of one component of the material, and wherein said hollow needle has at least one opening which extends radially through at least one wall of said hollow needle to feed the components of the material into the channel of the dosage needle.

A dosage gun for producing a multi-component material, comprising:

• a housing having a longitudinal bore therein which terminates at one end in an emission nozzle;
• at least two pressure tanks, each containing one component of the multi-component material, each tank being selectively connectable to said housing, wherein each tank has a discharge valve for selectively discharging its component into said housing longitudinal bore;
• and,
• a dosage device held in said housing longitudinal bore for dispensing the components in a predetermined proportion by volume, said dosage device comprising at least one hollow needle which is movably mounted in relation to said emission nozzle so that the components of the material are fed along an exterior periphery and through an interior bore, respectively, of said at least one hollow needle and wherein the components are dispensed at said emission nozzle as co-axial streams which flow into each other and a dosage needle arranged within said hollow needle, said dosage needle being movable in relation to said hollow needle in order to feed the components of the material to said emission nozzle, and wherein said dosage needle is rotatable in relation to said hollow needle in order to adjust the rate of feed to said emission nozzle;
• and,
• first and second set back mechanisms which each include a spring that sets back a respective one of said hollow needle and said dosage needle into the rest position.

A dosage gun for producing a multi-component material, comprising:

• a housing having a longitudinal bore therein which terminates at one end in an emission nozzle;
• at least two pressure tanks, each containing one component of the multi-component material, each tank being selectively connectable to said housing, wherein each tank has a discharge valve for selectively discharging its component into said housing longitudinal bore;
• a dosage device held in said housing longitudinal bore for dispensing the components in a predetermined proportion by volume, said dosage device comprising at least one hollow needle which is movably mounted in relation to said emission nozzle so that the components of the material are fed along an exterior periphery and through an interior bore, respectively, of said at least one hollow needle and wherein the components are dispensed at said emission nozzle as co-axial streams which flow into each other and a dosage needle arranged within said hollow needle, said dosage needle being movable in relation to said hollow needle in order to feed the components of the material to said emission nozzle, and wherein said dosage needle is rotatable in relation to said hollow needle in order to adjust the rate of feed to said emission nozzle;
• and,
• a mouthpiece which is placed on said emission nozzle and forms a widened mixing chamber wherein said mouthpiece is provided on its circumference with notches which form an intentional break point in order to indicate a stopping up of said mouthpiece wherein said mouthpiece has at least one aperture which extends radially through a wall of said mouthpiece near a connection zone of said mouthpiece with aid emission nozzle and further comprising a ring form element of an elastic material which is arranged on a circumference of said mouthpiece to provide an exterior seal for said bore.

A dosage gun for dispensing a multi-component material, comprising:

• a housing having a longitudinal bore therein which terminates at one end in an emission nozzle;
• and,
• a dosage device held in said housing longitudinal bore for dispensing each component of a multi-component material in a predetermined proportion by volume, said dosage device comprising;
• a hollow needle which is movably mounted in relation to said emission nozzle so that separate components of the material are fed along an exterior periphery and through an interior bore, respectively, of said hollow needle and wherein the components are dispensed at said emission nozzle as co-axial streams which flow into each other, and
• a dosage needle arranged within said hollow needle, said dosage needle being movable in relation to said hollow needle in order to feed one component of the material to said emission nozzle, wherein said dosage needle comprises:
• a conveying means for moving the one component towards said emission nozzle;
• and,
• a measuring means for dispensing a predetermined proportion of the one component fed through said conveying means in relation to another component fed along said exterior periphery of said hollow needle, wherein said dosage needle conveying means comprises at least one spiral groove which extends, starting from one end, over a predetermined length of the dosage needle, and forms a channel for the feeding of one component of the material, and wherein said hollow needle has at least one opening which extends radially through at least one wall of said hollow needle to feed the one component of the material into the channel of the dosage needle.

A dosage gun for dispensing a multi-component material, comprising:

• a housing having a longitudinal bore therein which terminates at one end in an emission nozzle;
• a dosage device held in said housing longitudinal bore for dispensing each component of a multi-component material in a predetermined proportion by volume, said dosage device comprising:
• a hollow needle which is movably mounted in relation to said emission nozzle so that separate components of the material are fed along an exterior periphery and through an interior bore, respectively, of said hollow needle and wherein the components are dispensed at said emission nozzle as co-axial streams which flow into each other, and
• a dosage needle arranged within said hollow needle, said dosage needle being movable in relation to said hollow needle in order to feed one component of the material to said emission nozzle, wherein said dosage needle comprises:
• a conveying means for moving the one component towards said emission nozzle;
• and,
• a measuring means for dispensing a predetermined proportion of the one component fed through said conveying means in relation to another component fed along said exterior periphery of said hollow needle;
• and,
• a closing member encircling a front end of said hollow needle and adapted to seal against said emission nozzle to prevent a flow of another component along said exterior periphery of said hollow needle, said closing member having a longitudinal bore extending therethrough wherein an extension on a front end of said dosage needle is adapted to selectively engage in said bore, and wherein said closing member includes on its outer periphery at least one longitudinally extending groove.