Mounting assembly for spray gun with anti-back-ionization probe

• US 5,957,396 A
• Filed: 10/28/1997
• Issued: 09/28/1999
• Est. Priority Date: 06/01/1995
• Status: Expired due to Fees

• Current Assignee: Nordson Corporation
• Original Assignee: Nordson Corporation
• Inventors: Haller, Curtis B., Crum, Gerald W., Knobbe, Alan J.
• Primary Examiner(s): WELDON, KEVIN P
• Application Number:
  US08/959,723
• Time in Patent Office: 700 Days
• Field of Search: 239/600, 239/587.3, 239/587.4, 239/690-708, 239/3, 118/628, 118/323
• US Class Current: 239/706
• CPC Class Codes: B05B 15/62 Arrangements for supporting spraying apparatus, e.g. suction cups
• CPC Class Codes: B05B 5/032 for spraying particulate materials
• CPC Class Codes: B05B 5/0533 Electrodes specially adapted therefor; Arrangements of electrodes
• CPC Class Codes: B05B 5/0535 at least two electrodes having different potentials being held on the discharge apparatus, one of them being a charging electrode of the corona type located in the spray or close to it, and another being of the non-corona type located outside of the path for the material

Abstract

A mounting assembly for adjustably mounting a spray gun onto a mounting bar comprises a ball-and-socket joint attached at one end to the bar and attached at the other end to the gun, and an adjustment sleeve extending along the exterior of the bar. The sleeve is attached to the ball-and-socket joint and adapted to tighten the socket around the ball when the sleeve is turned to retain the gun securely in a desired position with respect to the bar. The mounting assembly allows for positioning the spray gun in an almost limitless range of possible orientations, and allows the securing mechanism to be easily tightened and loosened by the operator by turning the adjustment sleeve. An anti-back-ionization probe is attached to the gun and extends externally to the gun along the top or side of the gun. The probe comprising an elongated rod, which is easily removable and easily adjustable in length.

Claims

1. An electrostatic spray gun assembly for spraying a coating material onto parts, which comprises:

a spray gun for spraying the coating material, the gun having

an elongated body having a longitudinal axis,

a supply of coating material connected to the body, and

a charging electrode for charging the coating material; and

a counter electrode attached to the gun body at an attachment point and extending externally to the gun along the outside of the gun body, the counter electrode being adjustable relative to the attachment point.

2. An electrostatic spray gun assembly, as defined in claim 1, wherein the counter electrode is an elongated rod and is capable of being mounted at the attachment point at different locations along the length of the rod to adjust the position of the counter electrode relative to the charging electrode.

3. An electrostatic spray gun assembly, as defined in claim 1, wherein the counter electrode is comprised of sections which can be assembled and disassembled to vary the length of the counter electrode.

4. An electrostatic spray gun assembly for spraying a coating material onto parts, which comprises:

a spray gun for spraying the coating material, the gun having

an elongated body having a longitudinal axis,

a supply of coating material connected to the body, and

an electrode for charging the coating material; and

an anti-back-ionization probe which collects ions produced by the electrode, the probe maintained at a different potential than the electrode, the probe attached to the gun body at an attachment location and extending externally to the gun along the outside of the gun body to a distal tip, the position of the distal tip being adjustable relative to the attachment location.

5. An electrostatic spray gun assembly as defined in claim 4, wherein the probe comprises an elongated rod which extends generally parallel to the longitudinal axis of the gun of the gun body.

6. An electrostatic spray gun assembly as defined in claim 4, wherein the probe is spaced from the gun body.

7. An electrostatic spray gun assembly for spraying a coating material onto parts, which comprises:

a spray gun for spraying the coating material, the gun having

an elongated body having a longitudinal axis,

a supply of coating material connected to the body, and

an electrode for charging the coating material; and

a device at a different potential than the electrode for attracting ions produced by the electrode, the device comprising an elongated rod attached to the gun body at an attachment point and extending externally to the gun along the outside of the gun body, the position of the rod being adjustable relative to the attachment point.

8. An electrostatic spray gun assembly as defined in claim 7, wherein the rod is electrically grounded.

9. An electrostatic spray gun assembly as defined in claim 7, wherein the rod is spaced from the gun body.

10. An electrostatic spray gun assembly as defined in claim 7, wherein the rod extends generally parallel to the axis of the gun body.

11. An electrostatic spray gun assembly as defined in claim 7, comprising in addition a gun mounting assembly attached to the gun and connecting the gun to a mounting bar, wherein the rod is attached to the gun body by being attached directly to the mounting assembly.

12. An electrostatic spray gun assembly as defined in claim 11, wherein the gun mounting assembly comprises

a ball-and-socket joint attached at one end to the bar and attached at the other end to the gun, and

an adjustment sleeve extending along the exterior a portion of the bar, the sleeve attached to the ball-and-socket joint and adapted to tighten the socket around the ball when the sleeve is turned to retain the gun securely in a desired position with respect to the bar.

13. An electrostatic spray gun assembly as defined in claim 12, wherein the adjustment sleeve completely surrounds the bar along a substantial portion of the bar'"'"'s length.

14. An electrostatic spray gun assembly as defined in claim 12, comprising in addition a mounting plate which attaches said other end of the ball-and-socket joint to the gun.