Rotary union assembly for filler device and associated method

A rotary union assembly for use in a rotary filler device comprising a first product supply conduit, a second product supply conduit, and a product supply turret rotatably coupled to the first product supply conduit and the second product supply conduit, to, in turn, maintain substantially sealed coupling therebetween.

BACKGROUND OF THE INVENTION
 1. Field of the Invention
 The present invention relates in general to a rotary union assembly, and
 more particularly, to a rotary union assembly, for use in association with
 a filler device, which efficiently coordinates a plurality of input
 supplies to a product supply turret associated therewith.
 2. Background Art
 Rotary union assemblies have been known in the art for years. Indeed, such
 assemblies are sometimes associated with rotary filling devices. While
 these rotary union assemblies have become commercially available, problems
 associated both with cleanliness and coordinating a plurality of input
 supplies remains largely problematic.
 It is therefore an object of the present invention to provide a reliable
 and simple rotary union assembly which is capable of efficiently
 coordinating the supply of, among other things, product, electricity, a
 pneumatic source, a vacuum source, a cleaning material, and/or a cleaning
 solution to a product supply turret for use therewith, and to otherwise
 remedy the detriments and/or complications associated with conventional
 rotary union assemblies known in the art.
 These and other objects of the present invention will become apparent in
 light of the present specification, claims, and drawings.
 SUMMARY OF THE INVENTION
 The present invention is directed to a rotary union assembly for use in a
 rotary filler device comprising: (a) a first product supply conduit; (b) a
 second product supply conduit; and (c) a product supply turret rotatably
 coupled to the first product supply conduit and the second product supply
 conduit, to, in turn, maintain substantially sealed coupling therebetween.
 In a preferred embodiment of the invention, the product supply turret
 includes: (a) at least one first product disbursement conduit in fluid
 communication with the first product supply conduit, wherein the at least
 one first product disbursement conduit is capable of being placed in fluid
 communication with a first fill valve; and (b) at least one second product
 disbursement conduit in fluid communication with the second product supply
 conduit, wherein the at least one second product disbursement conduit is
 capable of being placed in fluid communication with a second fill valve.
 The present invention is further directed to a method for supplying product
 through a rotary union assembly comprising the steps of: (a) providing a
 first product supply conduit; (b) providing a second product supply
 conduit; (c) providing a product supply turret having at least one first
 product disbursement conduit and at least one second product disbursement
 conduit; (d) associating the first product supply conduit with the at
 least one first product disbursement conduit; (e) associating the second
 product supply conduit with the at least one second product disbursement
 conduit; and (f) supplying a product through at least one of the first and
 second product supply conduits.
 The present invention is also directed to a method of cleaning a rotary
 union assembly comprising the steps of: (a) providing a first product
 supply conduit; (b) providing a second product supply conduit; (c)
 providing a product supply turret having at least one first product
 disbursement conduit and at least one second product disbursement conduit;
 (d) associating the first product supply conduit to the at least one first
 product disbursement conduit; (e) associating the second product supply
 conduit with the at least one second product disbursement conduit; (f)
 associating at least one of the at least one first product disbursement
 conduits with at least one of the at least one second product disbursement
 conduits; and (g) providing a cleaning fluid through one of the first and
 second product supply conduits, wherein the cleaning fluid will proceed to
 the other of the first and second product supply conduits.

DETAILED DESCRIPTION OF THE INVENTION
 While this invention is susceptible of embodiment in many different forms,
 there is shown in the drawings and described herein in detail several
 specific embodiments with the understanding that the present disclosure is
 to be considered as an exemplification of the principles of the invention
 and is not intended to limit the invention to the embodiments illustrated.
 It will be understood that like or analogous elements and/or components,
 referred to herein, are identified throughout the drawings by like
 reference characters.
 Referring now to the drawings and to FIG. 1 in particular, a
 cross-sectional schematic representation of a first embodiment of rotary
 union assembly 10 is shown, which generally comprises product supply means
 12, pneumatic supply means 14, electrical supply means 16 and vacuum
 supply means 18.
 As is shown in FIGS. 2 and 3, rotary union assembly 10 is primarily
 intended for use in association with filler device 200, which is capable
 of filling associated containers and/or bags with any one of a number of
 materials in solid, liquid, and/or gaseous states, including, for example,
 condiments (i.e catsup and mustard), wine, motor oil, battery acid--just
 to name a few.
 It will be understood that the FIGS. 1-3 are merely schematic
 representations. As such, some of the components have been distorted from
 their actual scale for pictorial clarity.
 Product supply means 12 is shown in FIG. 1 as including first product
 supply conduit 22, second product supply conduit 24, product supply turret
 26 and rotatable connecting means 28. As will be explained in greater
 detail below, product supply means 12, essentially supplies product from
 storage tanks (not shown) to the individual containers.
 First product supply conduit 22, as shown in FIG. 1, includes first end 40,
 second end 42, outer wall 44, inner wall 46. As can be seen, outer wall 44
 and inner wall 46 define product flow volume 50, and inner wall 46 defines
 conduit volume 52. Inner wall 46 fully separates product flow volume 50
 and conduit volume 52. As can be seen in FIG. 1, while a majority of the
 product flow volume 50 is in a vertical orientation, second end 42 of
 first product supply conduit 22 includes 90 degree elbow region 54 so that
 a portion of product flow volume 50 is in a substantially horizontal
 orientation. As will be understood, elbow region 54 is associated with a
 supply line which is in fluid communication with the product/fluid storage
 tank (not shown).
 Each of outer wall 44 and inner wall 46 comprise a substantially circular
 cross-sectional shape configuration with substantially concentric
 longitudinal axis. In turn, the volume defined by these walls is
 substantially cylindrical in cross-section. Of course, other
 cross-sectional shapes are likewise contemplated and the invention is not
 limited to circular cross-sections. Additionally, it is contemplated that
 the longitudinal axis of each of the inner wall and the outer wall may be
 distally spaced from each other, however, certain advantages are realized
 if the longitudinal axis of each, correspond.
 With respect to materials, preferably, first product supply conduit 22
 comprises a stainless steel material having a sufficient thickness to
 support the pressure exerted by the product. Such a material is preferably
 resistive to corrosion and which is quite durable. Such a material is
 readily acceptable for use in the food industry and is approved for use by
 the FDA. For other applications, the material utilized may comprise any
 metal or alloy thereof, which may optionally include a coating.
 Additionally, a synthetic plastic material or a composite material may be
 utilized.
 Second product supply conduit 24 is shown in FIG. 1 as being substantially
 similar to first product supply conduit 24 and includes first end 60,
 second end 62, outer wall 64, inner wall 66 and elbow region 72. Outer
 wall 64 and inner wall 66 define product flow volume 68 and inner wall 66
 defines conduit volume 70. Elbow region 72 is shown at a 60 degree angle,
 however other angles of inclination of the elbow region are likewise
 contemplated. Inner wall 66 fully isolates volume 68 from volume 70.
 Product supply turret 26 is shown in FIG. 1 as including first product
 chamber 81, at least one first product disbursement conduit 82, second
 product chamber 83 and at least one second product disbursement conduit
 84. In the contemplated embodiment, product supply turret 26 includes five
 first product disbursement conduits which are substantially similar to
 product disbursement conduit 82, and five second product disbursement
 conduits which are substantially similar to product disbursement conduit
 84. Each of the first product disbursement conduits are in fluid
 communication with first product chamber 81 and, in turn, first product
 supply conduit 22. Similarly, each of the second product disbursement
 conduits are in fluid communication with second product chamber 83 and, in
 turn, second product supply conduit 24.
 First product disbursement conduit 82 will be described with the
 understanding that each of the first product disbursement conduits are
 substantially identical. Specifically, as shown in FIG. 1, first product
 disbursement conduit 82 includes first end 86, second end 88, clamp 90 and
 fitting 92. First end 86 is associated with first disbursement conduit 82
 so as to be in fluid communication therewith. Clamp 90 and fitting 92 are
 positioned proximate second end 88. The clamp and the fitting are utilized
 to retain first product disbursement conduit 82 in fluid communication
 with the filling conduit 210 and one of the filling valves 140A-148A of
 rotary fill device 200. In the embodiment shown, wherein product supply
 turret 26 includes five first product disbursement conduits, the shape of
 the first product disbursement chamber 81 is configured so as to
 substantially evenly distribute and guide product (fluid) to each of the
 five first product disbursement conduits.
 Second product disbursement conduit 84 will be described with the
 understanding that each of the second product disbursement conduits are
 substantially identical. As shown in FIG. 1, second product disbursement
 conduit 84 includes first end 94, second end 96, clamp 98 and fitting 100.
 First end 94 is associated with second product chamber 83 so as to be in
 fluid communication therewith. Clamp 98 and fitting 100 operate in the
 same fashion as clamp 90 and fitting 92 by connecting to filling conduit
 and to filling valves.
 In the embodiment shown, the first and second product disbursement conduits
 are configured so that they feed alternating filling valves. Specifically,
 as shown in FIG. 2 of the drawings, first product disbursement conduits
 are associated with each of the valves identified as 140A-148A, whereas
 second product disbursement conduits are associated with each of the
 valves identified as 140B-148B. As will be explained, among other
 advantages, the alternating association of valves facilitates the eventual
 cleaning of the system.
 Rotatable connecting means 28 is shown in FIG. 1 as comprising first
 rotatable coupling 102 and second rotatable coupling 104. First rotatable
 coupling 102 includes seal member 106 and bearing 108. Seal member 106 may
 comprise various mechanical seals, such as a mechanical ceramic based
 seal, as well as various rubber, carbon and plastic seals. The type of
 seal utilized is not critical as long as the seal is capable of providing
 a substantially fluid impervious seal which is capable of withstanding
 rotation of the turret and the supply conduit over millions of cycles.
 Bearing 108 comprises a conventional bearing which facilitates the
 controlled rotation of product supply turret 26 relative to first product
 supply conduit 22. Of course, other systems which facilitate low friction
 rotation of the turret relative to the first supply conduit 22 are
 contemplated for use.
 Second rotatable coupling 104, as shown in FIG. 1, includes seal member 110
 and bearing 112. First rotatable coupling 102 is substantially identical
 to second rotatable coupling 104 in structure and operation. As will be
 understood, the second rotatable coupling 104 facilitates the rotation of
 product supply turret 26 relative to second product supply conduit 24 in a
 substantially fluid-tight configuration.
 Electricity supply means 16 is shown in FIG. 1 as comprising rotatable
 electric conduit 121, rotatable coupling 123, transfer case 125, external
 conduit 127, connecting member 129 and electrical wiring (not shown). The
 electricity supply means facilitates the providing of electricity to the
 product supply turret 26 continuously as the turret rotates relative to
 the first and second product supply conduits 22 and 24, respectively.
 Specifically, rotatable electric conduit 121 extends through conduit volume
 52 and includes proximal end 132 and distal end 134. Proximal end 132 is
 fixed to product supply turret 26. External conduit 127 is in
 communication with rotatable electric conduit 121 and positioned at the
 proximal end thereof. Connecting member 129 is in communication with
 rotatable electrical conduit 121 and positioned at the distal end thereof.
 Transfer case 125 and rotatable coupling 123 are associated with rotatable
 electric conduit 121 and positioned at proximal end 134 thereof Rotatable
 coupling 123 permits stable rotation of electric conduit within volume 52
 relative to first product supply conduit 22 about substantially the same
 axis of rotation as the product supply turret 26.
 As will be understood, electrical power is provided to the product supply
 turret 26 by wiring that extends through external conduit 127, rotating
 electrical conduit 121 and finally connecting member 129. Inasmuch as
 rotating electrical conduit 121 rotates relative to external conduit 127,
 transfer case 125 is supplied to facilitate and maintain electrical
 connectivity between the electrical wiring of the external conduit and the
 wiring of the rotating electrical conduit 121 and connecting member 129.
 While rotating electrical conduit is shown as extending substantially the
 length of product supply conduit 22, it is likewise contemplated that
 rotating electrical conduit 121 may extend only partially through the
 product supply conduit, wherein the transfer case, the rotatable coupling
 and the external conduit extend into product supply conduit 22 toward
 product supply turret. Of course other embodiments are likewise
 contemplated which can provide electrical connectivity between the
 non-rotating product supply conduits 22, 24 and the rotating product
 supply turret 26.
 Pneumatic supply means 14 is shown in FIG. 1 as comprising at least one
 pneumatic supply connection 141, at least one pneumatic conduit 142, at
 least one pneumatic connection 144 and means 145 for facilitating rotative
 coupling of the connection with the pneumatic conduit. Pneumatic supply
 connection 141 is configured so as to accept an air supply line such as an
 air hose (not shown). Pneumatic conduit 142 extends through at least a
 portion of conduit volume 52 between inner wall 46 and rotating electrical
 conduit 121. Pneumatic conduit joins supply connection 141 to pneumatic
 connection 144 in a substantially fluid tight configuration. Thus, air
 supplied to pneumatic supply connection 141 can be directed to the
 pneumatic connections. Each pneumatic connection 144 includes an end
 configured to readily attach to an air line that extends to one of the
 components on product supply turret 24, such as a filling valve.
 Vacuum supply means 18 is shown in FIG. 1 as comprising rotating vacuum
 conduit 150, at least one connecting coupling 152, external connecting
 coupling 154 and rotation facilitating means 156. Rotating vacuum conduit
 150 includes proximal end 158 and distal end 160. Proximal end 158 is
 associated with product supply turret 26. Each of the at least one
 connecting coupling 152 is in fluid communication with rotating vacuum
 conduit 150. As will be understood, connecting coupling 152 is then
 attached to a container, a bag or the like to facilitate the removal of
 any air or other materials (i.e. fluids) that may be in the bag.
 External connecting coupling 154 is in fluid communication with distal end
 160 of rotating vacuum conduit 150. Inasmuch as the rotating vacuum
 conduit 150 rotates relative to external connecting coupling 154, seals,
 such as seal 162 are provided to minimize leaking of this connection.
 Rotation facilitating means 156 comprises bearing 163 that is positioned
 so as to permit low-friction rotation of rotating vacuum conduit 150
 relative to second product supply conduit 24.
 Prior to operation, rotary union assembly 10 is assembled and positioned in
 a rotary filler device, such as rotary filler device 200 (FIGS. 2 and 3).
 Once positioned, fill valves 140A-148A are coupled to first product
 disbursement conduits 82 and fill valves 140B-148B are coupled to second
 product disbursement conduits 84. Specifically, as shown in FIG. 2, every
 other fill valve is associated with the same product supply conduit so
 that half of the fill valves are filled with product from first product
 supply conduit 22 and half of the fill valves are filled with product from
 the second product supply conduit 24.
 To couple a selected fill valve to first product disbursement conduit 82, a
 conduit, such as conduit 210 (FIG. 3) is connected to the respective fill
 valve at one end and, as shown in FIG. 1, to second end 88 of first
 product disbursement conduit 82 by way of fitting 92 and clamp 90. In a
 similar manner, to couple a selected fill valve to second product
 disbursement conduit 84, a conduit, such as conduit 212 (FIG. 3) is
 connected to the desired fill valve at one end and, as is shown in FIG. 1,
 to second end 96 of second product disbursement conduit 84 by way of
 fitting 100 and clamp 98.
 Next, devices, which are pneumatically powered (i.e. by compressed air),
 are associated with pneumatic supply means 14. Specifically, pneumatic
 supply connection 141 is associated with an outside pneumatic source, such
 as a compressor, which is capable of providing the desired pneumatic
 supply at a desired rate. In an embodiment wherein the fill valves are
 controlled pneumatically, pneumatic lines (not shown) are associated with
 the fill valve and connected to pneumatic connection 144 (FIG. 1). Once
 these connections are established, the fill valve is in fluid
 communication with the pneumatic source via pneumatic supply connection
 141, pneumatic conduit 142 and pneumatic connection 144. Of course, the
 specific number of connections, such as pneumatic connection 144, can be
 varied depending on the particular requirements for any given embodiment.
 Subsequently, any electrically driven components associated with product
 supply turret 26 can be wired to the wiring that extends through rotating
 electrical conduit 121 and connecting member 129. As explained above, by
 way of transfer case 125, electrical connectivity between the wiring in
 rotating electrical conduit 121 and external conduit 127 is maintained
 during rotation of the product supply turret 26.
 As shown in FIG. 1, should any component which rotates with product supply
 turret 26 require a vacuum connection, such a component is placed in fluid
 communication with connecting coupling 152 of vacuum supply means 18.
 Connecting coupling 152, as explained above, may comprise any one of a
 number of different coupling connections such as a snap connection, a
 threaded connection and the like.
 Once all of the connections for each of the product supply means 12,
 pneumatic supply means 14, electricity supply means 16 and vacuum supply
 means 18 are established and their supply is activated, rotary union
 assembly 10 is ready for operation.
 Specifically, in operation, as shown in FIGS. 1 and 2, product supply
 turret 26 begins to rotate relative to first product supply conduit 22 and
 second product supply conduit 24. Yet, by way of rotatable connecting
 means 28 and 104, seals are maintained at interfaces of product supply
 turret 26 and each of the product supply conduits 22, 24.
 As shown in FIG. 1, rotating electrical conduit 121 is attached to product
 supply turret 26 at its proximal 132, and rotates with product turret 26.
 Rotatable coupling 123 maintains steady low friction rotation of the
 rotating electrical conduit relative to first product supply conduit 22,
 and, transfer case 125 maintains electrical connectivity of the rotating
 wiring relative to the stationary wiring.
 As shown in FIG. 1, pneumatic connections, such as pneumatic connection 144
 is coupled to product supply turret 26, and in turn, pneumatic conduit 142
 and rotates therewith. Rotative coupling means 145 maintains fluid
 communication between pneumatic supply conduit 142 and pneumatic supply
 connections 141 and to insure an uninterrupted supply of pneumatic power
 during rotation and operation of product supply turret 26.
 Likewise, as shown in FIG. 1, proximal end 158 of rotating vacuum conduit
 150 is attached to product supply turret 26 and rotates therewith. Distal
 end 160 is maintained in a steady, low-friction rotation relative to
 second product supply conduit 24 by way of rotation facilitating means
 156.
 As product supply turret 26 rotates and operation of the fill valve
 apparatus proceeds, supply turret 26 supplies product to each of the fill
 valves from product supply means 12. Specifically, product passes through
 first product supply conduit 22 from first end 40 to second end 42.
 Subsequently, the product is directed beyond seal member 106 of first
 coupling 102 into first product chamber 81 which is rotating with product
 supply turret 26. At such time, the product is distributed to each of the
 first product disbursement conduits 82, to the respective fill valves and,
 in turn, to the respective container associated therewith.
 As can be appreciated, at any one time, certain of the fill valves will be
 in the open position (i.e. container filling position) and certain of the
 fill valves will be in the closed position (i.e. container filled or no
 container attached). Thus, the rate of flow from first product chamber 81
 to each of the first product disbursement conduits 82 will be varied and
 the flow rate is controlled by the fill valve.
 Product is also directed to second product supply conduit 24 from first end
 60 to second end 62. At that time, the product is directed beyond the seal
 member of second coupling 104 into second product chamber 83 which is
 rotating. In turn, the product is directed from second product chamber 83
 to the respective second product disbursement conduits 84. As explained
 above, since certain fill valves will be open and others will be closed,
 the supply to each second product disbursement conduit at any given time
 varies and is generally controlled by the fill valve.
 During the filling operations and the rotation of product supply turret 26,
 electrical supply is provided as needed by electricity supply means 16,
 pneumatic power as needed is supplied by pneumatic supply means 14, vacuum
 supply as needed is supplied by vacuum supply means 18. None of these
 means are disrupted by the rotation of the product supply turret 26.
 From time to time it becomes necessary to clean product supply means 12.
 One manner in which to clean the product supply means comprises the
 feeding of a cleaning (or CIP) solution through the product supply means.
 In particular, any containers attached to fill valves are removed. Next,
 each fill valve associated with first product supply conduit 22 is coupled
 to a fill valve associated with second product supply conduit 24. As
 explained above, wherein supply to the fill valves is alternated, proper
 coupling of the fill valves only requires the coupling of a fill valve to
 an immediately adjacent fill valve.
 Once each fill valve is coupled to another fill valve, a cleaning solution
 is supplied to first product supply conduit 22. The cleaning solution
 travels through first product supply conduit 22 from first end 40 to
 second end 42 and then enters first product chamber 81 wherein it is
 distributed to each of the first product disbursement conduits 82. The
 first product disbursement conduits distribute the cleaning solution to
 every other fill valve (i.e. 140A -148A). Inasmuch as each fill valve
 140A-148A is coupled to one of fill valves 140B-148B, the cleaning
 solution is directed through each of the fill valves 140B-148B back to
 second product disbursement conduit 84. At such time the solution proceeds
 through second product chamber 83 and eventually through second product
 supply conduit 24 from second end 62 to first end 60 where it can be
 collected for filtering and reuse, or for disposal.
 The cleaning solution can likewise be reversed so that the solution is
 introduced through second product supply conduit 24 and collected at first
 product supply conduit 22 for filtering and reuse or for disposal.
 Once the cleaning of the product supply conduit is completed, fill valves
 140A-148A are disconnected from respective fill valves 140B-148B and the
 system is again ready for operation. Advantageously, by alternating fill
 valves 140A-148A with fill valves 140B-148B, and by providing two product
 supply conduits, in the embodiment shown, only five short hoses (or
 conduits) are required to connect the respective fill valves to prepare
 the system for cleaning.
 The foregoing description merely explains and illustrates the invention and
 the invention is not limited thereto except insofar as the appended claims
 are so limited, as those skilled in the art who have the disclosure before
 them will be able to make modifications without departing from the scope
 of the invention.