Pistole zum Mischen und Abgeben eines aus mehreren Komponenten zusammengesetzten Materials

930,958. Mixing-appliances. PYLES INDUSTRIES Inc. Aug. 8, 1961 [Aug. 18, 1960], No. 28671/61. Class 86 [Also in Group XXIX] A portable, hand-held, mixing gun for a twopart mixer comprising a base component and an accelerator, Fig. 1, has a body 20 carrying a pneumatic motor 22 driving through a detachable coupling 198 a mixing rotor 194, see also Fig. 2. The mixing chamber body 190 and cover 206 are detachably mounted on the gun body and retained by a pair of wing-nuts. The trigger 24 has a shoulder which actuates the motor stop and start air valve 104 which also admits air to a part 120 to start a metering and pumping apparatus which supplies the mixture components; there is also an adjustable air regulating valve 92 for controlling the motor speed. The trigger also, through a link 180 and yoke 178, 172 (Fig. 6) unlocks, after the motor valve 104 has opened, the valves 156, 158 controlling admission of accelerator and base material respectively to the mixing chamber. Being spring-loaded these valves, after actuation of the trigger, will not open until the pressure of the materials is sufficient to unseat them; they act also as check valves against reverse flow of material from the mixing chamber. Adjustment nuts 174, 176 are provided to adjust the inflow pressures of the components. An air line is connected to a passage in the mixing chamber body 190, see Fig. 4 (not shown), whereby compressed air may be admitted to the mixing chamber when making foams, there being a needle shut-off and adjustment valve in the member 190. The same line may also be used to admit solvent or a solvent-air mixture for purging the mixer. The gun may have a tubular discharge nozzle 30 as shown, or a spray nozzle, see Fig. 8 (not shown) and Group XXIX. A modified mixing rotor, 362, Figs. 17 and 18, has blades 364 with angularly rearwardly extending portions 374 forming pockets 375 which trap the material, increasing the residence time and homogeneity of the mix. Specification 922,825 is referred to.