Paint spray gun

Patent metadata

Field	Value
Publication number	US-9533317-B2
Application number	US-201013380949-A
Country	US
Kind code	B2
Filing date	Jun 7, 2010
Priority date	Jul 8, 2009
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

The invention relates to a paint spray gun ( 1 ) having a compressed air distribution chamber ( 8 ) into which a compressed air feed line ( 10 ), a round jet line ( 6 ) and a wide jet line ( 7 ) open, the quantity of compressed air supplied to the compressed air distribution chamber ( 8 ), the round jet line ( 6 ) and the wide jet line ( 7 ) being adjustable via a setting element arranged in the compressed air distribution chamber ( 8 ) and rotatable from outside by an actuating element ( 15 ) about an axis of rotation (D) extending through the compressed air distribution chamber ( 8 ). Said paint spray gun ( 1 ) is characterized in that the setting element is formed as a rotary distributor ( 14 ) that is held immovably in the axial direction of the axis of rotation (D) and can be rotated about the axis of rotation (D) in order to open and close openings ( 6′, 7′, 10′ ) of the round jet line ( 6 ) and/or the wide jet line ( 7 ) and/or the compressed air feed line ( 10 ).

First claim

The invention claimed is:

1. A paint spray gun comprising:
a compressed air distribution chamber;
a compressed air feed line, a round jet line, and a wide jet line, all of which open into the compressed air distribution chamber;
an actuating element external to the compressed air distribution chamber and rotatable about a control axis of rotation extending through the compressed air distribution chamber; and
a spindle rotatable in connection with the actuating element, movement of the spindle radially rotatable about the control axis and not axially movable along the control axis, the spindle including:
a sealing surface pressed against an inside surface of the air distribution chamber, first and second portions of the sealing surface forming first and second ports, respectively, the first port radially slidable past and over only the round jet line opening, the second port radially slidable past and over only the wide jet line opening, as the spindle is radially rotated, the first and second ports which are elongated in a radially extending direction and are shaped and positioned to simultaneously and independently, with respect to each other, partially block the round jet line and wide jet line openings to a predetermined extent, independently relative to each other, at a given angle of rotation of the spindle.

2. The paint spray gun according to 1 , wherein the compressed air distribution chamber is a cylinder shape, is bounded by a lateral surface, has an open end, and a closed end, and the compressed air feed line introduces compressed air into the compressed air distribution chamber along the lateral surface.

3. The paint spray gun according to claim 2 , wherein the spindle includes a circular guide having an outer diameter equal to an inner diameter of the compressed air distribution cylinder.

4. The paint spray gun according to 2 , wherein the round jet line, the wide jet line, and the compressed air feed line open into the compressed air distribution chamber at the lateral surface.

5. The paint spray gun according to claim 1 , wherein the spindle is formed as a section of a cylinder about an axis of rotation that is coaxial with the actuating element.

6. The paint spray gun according to claim 1 , wherein shapes of at least one the ports of the first and second portions define an opening shape that is elongated along a radial direction relative to the control axis and has non-uniform width along the radial direction.

7. The paint spray gun according to claim 1 , wherein the spindle further comprises a third sealing surface portion for controlling communication with the compressed air feed line, the third portion radially extending along the sealing surface, shaped to block and expose predetermined amounts of the compressed air feed opening at a given angle of rotation of the spindle, to thereby control an amount of air that is admitted from compressed air feed at the given angle of rotation of the spindle.

8. The paint spray gun according to claim 1 , further comprising at least one setting display for displaying a radial orientation of the spindle in the compressed air distribution chamber.

9. The paint spray gun according to claim 8 , wherein the setting display is a marking on each of the actuating element and a body of the paint spray gun.

10. The paint spray gun according to claim 8 , wherein the marking is in a form of a raised position marking.

11. The paint spray gun according to claim 1 , wherein the spindle contacts at least one abutment on a body of the paint spray gun to limit rotation of the spindle.

12. The paint spray gun according to claim 11 , wherein the at least one abutment includes two cooperating abutments which determine at least opening and closing rotational positions of the spindle.

13. The paint spray gun according to claim 12 , wherein the spindle rotates through an angle of approximately 95° between the opening and closing positions.

14. A paint spray gun comprising:
a compressed air distribution chamber defining an interior surface and a longitudinal central axis;
a compressed air feed line, a round jet line, and a wide jet line, all of which open into the compressed air distribution chamber;
an actuating element external to the compressed air distribution chamber and rotatable about a control axis of rotation extending through the compressed air distribution chamber; and
a spindle rotatable in connection with the actuating element, movement of the spindle confined to a radial rotation about the control axis, the spindle including:
a sealing surface pressed against an inside surface of the air distribution chamber, first and second portions of the sealing surface forming first and second ports, respectively, the first port radially slidable past and over the round jet line opening, the second port radially slidable past and over the wide jet line opening, as the spindle is radially rotated;
the first and second ports disposed at different axial displacements along the longitudinal axis to thereby not overlap each other in the axial direction, each radially extending along the sealing surface, each forming a radially extending elongate opening shaped to simultaneously partially block the respective round jet line and wide jet line opening to a predetermined extent independently relative to a position of the other port, to thereby control an amount of air that is admitted into the round jet line and wide jet line, respectively.

15. The spray gun of claim 14 , wherein the spindle includes a resilient material which is squeezed against the interior surface of the air distribution chamber to form an air seal.

16. The spray gun of claim 14 , wherein the actuator is composed of metal and the spindle is composed of plastic.

17. The spray gun of claim 14 , wherein the spindle is fabricated with polyamide.

18. The spray gun of claim 14 , wherein at least one of the first and second portions are shaped to progressively block a respective opening as the spindle is rotated.

19. The spray gun of claim 14 , further including a third portion radially extending along the sealing surface and shaped to block the compressed air line to a predetermined extent at a given angle of rotation of the spindle, to thereby control an amount of air that is admitted from the compressed air line into the air distribution chamber at the given angle of rotation of the spindle.

20. A paint spray gun comprising:
a compressed air distribution chamber defining a sealed end with an opening, a closed end, a cylindrical interior surface disposed between the sealed end and the closed end, and a longitudinal central axis;
a compressed air feed line, a round jet line, and a wide jet line, all of which open into the compressed air distribution chamber along the cylindrical interior surface;
an actuating element external to the compressed air distribution chamber and rotatable about the central axis; and
a spindle inserted into the cylindrical interior surface and rotatable in connection with the actuating element, movement of the spindle confined to a radial rotation about the central axis, the spindle including:
a sealing surface squeezed against the cylindrical interior surface of the air distribution chamber, the sealing surface forming first, second, and third ports each radially slidable past and over only one of the round jet line, wide jet line, and compressed air openings, respectively, as the spindle is radially rotated the first and second ports axially separated from each other along the central axis;
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Assignees

• Gehrung Ralf
• Di Nicola Rocco
• Dettlaff Peter
• Sata Gmbh & Co Kg

Inventors

• Gehrung Ralf
• Di Nicola Rocco
• Dettlaff Peter

Classifications

• B05B7/0838

  comprising a single means controlling simultaneously the flow rates of shaping and spraying gas jets · CPC title

• B05B7/0815 Primary

  with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter · CPC title