US 7,631,787 B1 · Powder metering tube for powder measuring device

Abstract

A powder meter tube includes a metering tube and a metering assembly. The metering assembly is retained in the metering tube. The metering tube includes a nut cutout and a graduated slot. The metering assembly includes a threaded shaft, a micrometer nut, a piston and a bearing. A threaded hole is formed through the micrometer nut to threadably receive the threaded shaft. The bearing includes a base and two spring fingers that extend from the base. The piston is pressed on to one end of the threaded shaft and the bearing pressed on to an opposite end of the threaded shaft. The spring fingers allow the metering assembly to be inserted into the metering tube and the micrometer nut to protrude through the nut cutout. In use, the micrometer nut is rotated in either direction to increase or decrease the powder capacity in the metering tube.

Claims20

Dependent claims

A powder metering tube in combination with a powder measuring device comprising:

a metering tube having a nut cutout;
an adjustment nut being sized to be received by said nut cutout;
a threaded shaft having one end that is sized to be received by an inner perimeter of said metering tube, said threaded shaft being threaded into said adjustment nut;
a piston being retained on said one end of said threaded shaft, a powder chamber being created in said metering tube between an end of said metering tube and an end of said piston, a volume of said powder chamber being changed by said adjustment nut, said powder chamber being filled by the powder measuring device;
and
means for preventing the rotation of said threaded shaft.

3 more elements

Dependencies are inferred from the claim text.

Powder metering tube for powder measuring device

Life of this patent

Powder metering tube for powder measuring device

Life of this patent

Abstract

Claims20