AIR CAP ARRANGEMENT AND SPRAY GUN

• US 20180050356A1
• Filed: 08/17/2017
• Published: 02/22/2018
• Est. Priority Date: 08/19/2016
• Status: Active Grant

• Current Assignee: Sata GmbH & Co. KG (SATA Holding GmbH)
• Original Assignee: Sata GmbH & Co. KG (SATA Holding GmbH)
• Inventors: GEHRUNG, Ralf
• Granted Patent: US 10,471,449 B2
• Time in Patent Office: Days
• CPC Class Codes: B05B 1/3046 the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice B05B1/308 takes precedence
• CPC Class Codes: B05B 15/65 Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
• CPC Class Codes: B05B 7/066 with an inner liquid outlet surrounded by at least one annular gas outlet
• CPC Class Codes: B05B 7/068 the annular gas outlet being supplied by a gas conduit having an axially concave curved internal surface just upstream said outlet
• CPC Class Codes: B05B 7/0815 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 Class Codes: B05B 7/083 comprising rotatable spray shaping gas jet outlets
• CPC Class Codes: B05B 7/1245 A gas valve being opened before a liquid valve
• CPC Class Codes: B05B 7/2478 Gun with a container which, in normal use, is located above the gun

Abstract

An air cap arrangement and a spray gun. The air cap arrangement comprises an air cap, an air cap ring and a retaining ring. The air cap ring comprises a groove configured to extend on the circumferential inner surface of the air cap ring. The air cap also comprises a groove configured to extend on the circumferential outer surface of the air cap, and the retaining ring is arranged in the groove of the air cap ring and the groove of the air cap to limit the axial movement of the air cap within the air cap ring.

Claims

1. An air cap arrangement for spray gun, comprising an air cap, an air cap ring and a retaining ring, in which the air cap has a circumferential outer surface extending longitudinally, and the air cap ring has a circumferential inner surface extending longitudinally, wherein

the air cap ring comprises a groove configured to extend on the circumferential inner surface of the air cap ring;

the air cap further comprises a groove configured to extend on the circumferential outer surface of the air cap, and

the retaining ring is arranged in the groove of the air cap ring and the groove of the air cap to limit the axial movement of the air cap within the air cap ring.

2. The air cap arrangement according to claim 1, wherein

the air cap ring further comprises a protrusion configured to protrude radially from the circumferential inner surface of the air cap ring,

the groove of the air cap ring is further configured to extend circumferentially and locate closer to the front end of the air cap ring than the protrusion;

the air cap further comprises a step configured to protrude radially from the circumferential outer surface of the air cap,

the groove of the air cap is configured to extend circumferentially and locate closer to the front end of the air cap than the step, and wherein

the front surface of the step can contact against the rear surface of the protrusion.

3. The air cap arrangement according to claim 1, wherein the circumferential inner surface of the rear end of the air cap ring is provided with a thread.

4. The air cap arrangement according to claim 1, wherein the retaining ring is flexible.

5. The air cap arrangement according to claim 4, wherein the retaining ring is a polygonal ring.

6. The air cap arrangement according to claim 4, wherein the retaining ring is made of elastic material.

7. The air cap arrangement according to claim 4, wherein the retaining ring is made of rubber material.

8. The air cap arrangement according to claim 1, wherein the rear end of the air cap is provided with a circular protrusion protruding backward, and the end, protruding backward, of the circular protrusion is provided with a circular cone surface.

9. The air cap arrangement according to claim 2, wherein the step and the protrusion run over the whole circumference respectively.

10. The air cap arrangement according to claim 2, wherein at least one of the step and the protrusion is discontinuous.

11. The air cap arrangement according to claim 1, wherein the retaining ring is an entire ring.

12. The air cap arrangement according to claim 1, wherein the retaining ring comprises a cut.

13. A spray gun, comprising a gun body and an air cap arrangement, wherein the spray gun head of the gun body is connected with the air cap arrangement, the air cap arrangement comprises an air cap, an air cap ring and a retaining ring, in which a rear end of the air cap ring is connected with the spray gun head, the air cap has a circumferential outer surface extending longitudinally, and the air cap ring has a circumferential inner surface extending longitudinally, wherein

the air cap ring comprises a groove configured to extend on the circumferential inner surface of the air cap ring;

the air cap further comprises a groove configured to extend on the circumferential outer surface of the air cap, and

the retaining ring is arranged in the groove of the air cap ring and the groove of the air cap to limit the axial movement of the air cap within the air cap ring.

14. The spray gun according to claim 13, wherein

the rear end of the air cap is provided with a first circular protrusion protruding backward, and the end, protruding backward, of the circular protrusion is configured in a circular cone surface,

a paint nozzle arranged in the spray gun is provided with a second circular protrusion protruding forward, and the end, protruding forward, of the second circular protrusion is configured in a circular cone surface, contacting against the circular cone surface of the first circular protrusion.