Spray system for application of adhesive to a stator tube
AssigneeSmith International, Inc.
InventorDaniel H. Symonds
Life of this patent
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Abstract
Spray assemblies for use in coating a regular or irregular internal surface of a cylinder, and methods for coating the inside of a cylinder are disclosed. The spray assemblies may include: a spray head comprising a nozzle for spraying a coating material on an internal surface of a cylinder; a support wand coupled to the spray head; and a roller sleeve rotatably connected to the support wand and configured to contact the internal surface of the cylinder and to rotate radially as the cylinder is rotated. The spray assemblies may be used to provide a consistent and repeatable coating thickness, regardless of cylinder internal diameter. In some embodiments, the spray assemblies may be used to coat the internal surface of a stator tube.
Claims47
A spray assembly for use in coating a regular or irregular internal surface of a cylinder, the assembly comprising:
- a spray head comprising a nozzle for spraying a coating material on an internal surface of a cylinder;
- a support wand coupled to the spray head and maintaining the spray head in place;
- and
- a roller sleeve rotatably connected to the support wand and configured to contact the internal surface of the cylinder and to rotate as the cylinder is rotated.
A method for spray coating an internal surface of a cylinder, the method comprising:
- inserting a spray assembly into a cylinder, the spray assembly comprising:
- a spray head comprising a nozzle for spraying a coating material on an internal surface of the cylinder;
- a support wand coupled to the spray head and maintaining the spray head in place;
- and
- a roller sleeve rotatably connected to the support wand and configured to contact the internal surface of the cylinder and to rotate as the cylinder is rotated;
- withdrawing the spray assembly from the cylinder while rotating the cylinder;
- supplying the coating material to the spray head to coat the internal surface of the cylinder with the coating material.
A method of manufacturing a stator, comprising:
- inserting a spray assembly into a stator tube, the spray assembly comprising:
- a spray head comprising a nozzle for spraying a coating material on an internal surface of the stator tube;
- a support wand coupled to the spray head and maintaining the spray head in place;
- and
- a roller sleeve rotatably connected to the support wand and configured to contact the internal surface of the stator tube and to rotate as the stator tube is rotated;
- supplying the coating material to the spray head to coat the internal surface of the stator tube with the coating material;
- withdrawing the spray assembly from the stator tube while rotating the stator tube;
- and
- subsequently inserting or molding an elastomeric stator lining into the stator tube.
A method for uniformly spray coating an internal surface of cylinders having different internal diameters, the method comprising:
- inserting a spray assembly into a first cylinder, the spray assembly comprising:
- a spray head comprising a nozzle for spraying a coating material on an internal surface of the first cylinder;
- a support wand coupled to the spray head;
- and
- a roller sleeve rotatably connected to the support wand and configured to contact the internal surface of the first cylinder and to rotate as the first cylinder is rotated;
- supplying the coating material to the spray head to coat the internal surface of the first cylinder with the coating material;
- withdrawing the spray assembly from the first cylinder while rotating the first cylinder;
- inserting the spray assembly into a second cylinder having a different internal diameter than the first cylinder;
- supplying the coating material to the spray head to coat the internal surface of the second cylinder with the coating material;
- withdrawing the spray assembly from the second cylinder while rotating the second cylinder.
Dependencies are inferred from the claim text.