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Apparatus-for-discharging-material

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Apparatus for discharging material

Details

Inventors: Willis, Frank M.;
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Examiner: Vrablik; John J.
Assistant Examiner:
Attorney, Agent or Firm:

A progressing cavity pump having a rotor (13) which rotates and orbits within a stator (14) is provided with the stator (14) being connected at one end to a hopper (12) containing the material being dispensed by a flexible tube (26) and to a fixed joint (29) at its other end. This fixed joint (29) and a flexible joint (21) connecting the rotor (13) to a rotary drive means (20) are positioned outside the material, for easy observation; together with the flexible tube (26) such joints permit the rotor (13) to rotate and to orbit conically about the flexible joint (22) and the stator to orbit conically about the fixed joint (29), 180.degree. out of phase with the rotor. The apparatus is particular suited to handle a water gel explosive which might create a safety hazard if the explosive enters a joint without detection.

DETAILED DESCRIPTION Briefly described, this invention is an apparatus for discharging material from a supply source.
It is particularly useful in discharging a hopper of a fluid explosive.
Such apparatus, basically, is an improved progressing cavity pump and includes an orbitable stator connected at one end to the hopper by a connecting means and an orbitable and rotatable rotor operatively connected to the stator and driven through a flexible joint positioned above the material.
The other end of the stator is connected to a fixed joint positioned below the material and the connecting means is made of a flexible material.
These joints and this flexible connection permit the rotor and stator to orbit upon rotation of the rotor.
This invention further is an improvement in an apparatus for discharging material from a hopper which includes a progressing cavity pump having a rotor operatively connected to a stator having its centerline parallel to the rotor centerline, the rotor being connected to rotary drive means and the apparatus having means to prevent rotation of the stator.
In improving this apparatus the stator is connected to a fixed joint which is pivotable whereby upon activation of the rotary drive means the rotor rotates about the rotor centerline and orbits in a conical orbit having an apex located on the rotor centerline, and the stator orbits in a conical orbit having an apex located on the stator centerline.
In this apparatus the rotor is connected to the rotary drive means through a flexible joint which is pivotable and rotatable and the stator is connected to the hopper by a connecting means made of a flexible material.
Further in such apparatus the fixed joint is provided with means to prevent rotation of the stator at such fixed joint and the apex of the conical orbit in which the stator orbits is located at this fixed joint.
Importantly, the centerlines of the rotor and the stator are enclosed within the flexible connecting means which connects the stator to the hopper

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