Fluid sprinkling – spraying – and diffusing – Terminal member adjustably or shiftably connected to flow... – Flexible coupling section
Patent
1995-05-15
1997-11-11
Oberleitner, Robert J.
Fluid sprinkling, spraying, and diffusing
Terminal member adjustably or shiftably connected to flow...
Flexible coupling section
B05B 1508
Patent
active
056854951
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a coating product sprayer device having a rotary sprayer member. The sprayer member is preferably in the form of a bowl or bell, for example, and is rotated at very high speed by a turbine.
The invention is more particularly concerned with an improvement to make the sprayer device lighter in weight and easier to handle and to make it easier to mount and to demount the rotary sprayer member.
The invention also concerns a tool for mounting and demounting the rotary sprayer member.
In prior art installations for spraying a liquid coating product such as an organic solvent or water based paint, the coating product is atomized to form a spray of fine droplets which are then attracted electrostatically onto the object to be coated. The coating product is atomized by a bowl-shape rotary sprayer member rotated at high speed. The rotation speed can be between 30 000 rpm and 100 000 rpm; it is usually between 40 000 rpm and 60 000 rpm.
Given these rotation speeds, it is desirable for the rotary sprayer member to be as light as possible and for it to be precisely dynamically balanced, especially if it is driven by a turbine with air and/or magnetic bearings which are very sensitive to so-called "imbalance" effects, which can damage them.
A rotary sprayer member of this kind is conventionally assembled to the rotor of the turbine by a set of six to eight bolts which are equi-angularly distributed in the circumferential direction. This type of assembly significantly increases the weight of the rotary assembly and can complicate dynamic balancing. Also, mounting and demounting the rotary sprayer member for cleaning and maintenance are difficult and time-consuming.
SUMMARY OF THE INVENTION
The invention proposes a new type of assembly which does not have the drawbacks mentioned above.
In a first aspect the invention consists in a liquid coating product sprayer device comprising a rotary sprayer member and drive means for rotating said sprayer member, characterized in that said rotary sprayer member is attached to said drive means by an elastic coupling member including at least one nesting ring adapted to expand radially in response to centrifugal force and engaged with an interior annular surface of a relatively more rigid part of said rotary sprayer member or said drive means.
In a preferred embodiment of the invention the nesting ring includes a bead or other annular projection extending radially outwards and the aforementioned interior annular surface includes a groove the shape and size of which are adapted to accommodate the annular bead or the like. The elastic coupling member can be in the form of a ring having at least one such portion elastically and uniformly deformable in the radial direction. This is the case in particular when said elastic coupling member is made from an elastically deformable plastics material.
In another embodiment of the invention the nesting ring is an annular portion in which are formed slots or other like longitudinal openings defining a plurality of flexible blades. In this case the aforementioned bead is defined at the ends of said blades and therefore has a structure segmented by said slots. In this case said nesting ring can be a metal ring.
The invention will be better understood and other advantages of the invention will emerge more clearly from the following description of various embodiments of a coating product sprayer device of the invention and a mounting/demounting tool, given by way of example only and with reference to the appended drawings in which:
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a diagrammatic view in longitudinal section of part of a liquid coating product sprayer device of the invention;
FIG. 2 is a view similar to FIG. 1 of another embodiment of the invention;
FIG. 3 is a view similar to FIG. 1 of a further embodiment of the invention;
FIG. 4 is a diagrammatic view in longitudinal section of the end part of a further embodiment of coating product sprayer device of the invention;
FIG. 5 is a part-s
REFERENCES:
patent: 3067952 (1962-12-01), Aghnides
patent: 3674413 (1972-07-01), Fraser
patent: 3759445 (1973-09-01), King
patent: 4776520 (1988-10-01), Merritt
patent: 5064123 (1991-11-01), Aiello
patent: 5165156 (1992-11-01), Shultz
patent: 5370316 (1994-12-01), Landcaster
Merabet Djamel
Pham Van Tan
Bartz C. T.
Oberleitner Robert J.
Sames S.A.
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