Caddy for texture gun having a hopper

Information

  • Patent Grant
  • 6494420
  • Patent Number
    6,494,420
  • Date Filed
    Tuesday, July 31, 2001
    23 years ago
  • Date Issued
    Tuesday, December 17, 2002
    21 years ago
Abstract
A caddy is provided for supporting a hopper, such as a hopper associated with a texture gun. In one embodiment, the caddy includes a base having a top defined by a plate. A first support extends upwardly from a first side of the base and a second support extends upwardly from an opposing second side of the base. A frame is mounted to the first and second supports above the base and is adapted to engage a hopper and support it above the base. In one embodiment, the frame has four sides, three of which are closed, the frame defining a generally open interior area in which a hopper may be located. The fourth side is defined by a pair of stops which extend from opposing sides of the frame, but which have a gap there between. In one embodiment, the base has a semi-circular end having a generally circular opening in the plate which a container may be located. A support or mount is located below a top surface of the plate in which the opening is provided, the mount for supporting a container located placed into the opening. Wheels are connected to the base and extend downwardly from the bottom for rollably supporting the caddy.
Description




FIELD OF THE INVENTION




The present invention relates to texture guns, and more specifically a caddy for those guns which include a hopper for containing texture material.




BACKGROUND OF THE INVENTION




It is common to apply any of a variety of coatings or textures to ceilings, walls and other surfaces. In the construction of a home, texture is applied over drywall to form a textured wall surface. A variety of textures may be applied to the ceiling, including those for aesthetic and acoustical purposes.




A variety of devices are available for applying these textures. One such device is a texture gun. The texture gun includes a handle which is gripped by a user. The texture gun includes an inlet through which texture is fed, and an outlet through which texture is sprayed. Means are provided for propelling the incoming texture through the outlet. This means may comprise compressed air provided to the gun through an air hose. A trigger is provided which the operator uses to selectively control the dispensing of the texture.




The texture gun is capable of dispensing large quantities of texture in short periods of time. As such, it is desirable to provide a substantial volume of texture to the gun for application. In one embodiment, a hopper is mounted to the top of the gun. The hopper is generally funnel-shaped, having a large top opening, a holding area, and an outlet. The outlet leads directly to the inlet of the texture gun.




A hopper such as that described may hold several gallons of texture. A significant problem is that it is difficult to fill the texture gun hopper. As is appreciated, it is not generally possible to set the texture gun and hopper on the floor and fill the hopper. The hopper gun is small and narrow, and does not provide a stable support for the hopper. Thus, the hopper gun tends to tip over or otherwise move when one attempts to fill the hopper. Further, the hopper is generally not level when resting on the gun, so that the hopper can not be completely filled.




As a result of these problems, filling the texture hopper is generally a two-man job. One person holds the gun and attached hopper in a fixed and level position. Another person then fills the hopper.




Of course, in some instances, an extra person is not available to aid in this task. In any event, the use of an extra person's time and effort in filling the hopper is not efficient.




Other problems exist with these texture guns with attached hoppers. For example, if the hopper is not empty but the operator needs to cease dispensing texture and engage in another activity, the operator must set the gun and attached hopper down. To avoid having the texture spill from the hopper, the operator must attempt to prop up the texture gun and hopper. The gun often tips or falls over, dumping the texture from the hopper.




Transport of the gun and attached hopper can also be difficult. An operator may need to move from room to room while applying texture. The operator may also need to move associated tools and containers of texture. In some arrangements, the hopper may include a handle for gripping by the operator. However, the handle is generally located at one side of the hopper, so that when gripped the hopper and gun rotate to a non-vertical position. If the hopper is full, texture may spill from the hopper.




A method and device for supporting and moving a texture gun including a texture hopper is desired.




SUMMARY OF THE INVENTION




The present invention comprises a method and apparatus for supporting and transporting a hopper, such as a hopper associated with a texture gun.




In one embodiment, the apparatus comprises a hopper caddy. The hopper caddy includes a base. The base has a top and bottom. The top comprises plate or deck. In one embodiment, a supporting rib extends around a periphery of the plate at the bottom of the base for supporting the plate. The base has generally opposing first and second ends and generally opposing first and second sides. In one embodiment, one of the ends is generally semi-circular in shape.




Means are provided for supporting a hopper above the base. In one embodiment, this means comprises a first support, a second support and an elevated frame supported by the supports. The first support extends upwardly from the first side of the base. The second support extends upwardly from the second side of the base.




The first and second supports both include first and second legs. Each leg has an end connected to the base and another end located above the base. A strut or horizontally extending member extends between the legs of each of the first and second supports. In one embodiment, the first and second supports are configured as inverted “U”-shaped members.




The frame has a first side connected to the strut of the first support and a second side connected to the strut of the second support. A member spans the first and second sides of the frame. In one embodiment, the member connects a first end of the first side and a first end of the second side. A stop extends from a second end of the first side and another stop extends from a second end of the second side of the frame. In one embodiment, the two stops extend inwardly towards one another along a line which is generally parallel to the member at the first ends of the sides. So configured, the frame is generally “U” or “C” shaped, having a periphery substantially surrounding a generally open area which a hopper may be located.




In one embodiment, means are provided for rollably supporting the caddy. In one embodiment, four wheels are connected to the base and extend downwardly from the bottom of the base.




In one embodiment, the caddy includes a container support adapted to support a container. In one embodiment, the container support includes an opening in the plate or deck of the base through which a container may be placed, and a support or mount located below the top of the plate for supporting a container located in the opening.




In one embodiment, a lip extends downwardly from the periphery of the opening at the top of the plate or deck. The mount comprises a “+” shaped member located at the bottom of the lip.




In accordance with the invention, a hopper, such as a hopper associated with the texture gun, may be supported in a stable and secure position above the base of the caddy. As supported, material may be placed on the frame and loaded into the hopper. The hopper may also be transported by moving the caddy.




A container, such as a bucket of texture, may also be supported by the caddy. The container may be used to hold texture which is poured into the hopper.




Further objects, features, and advantages of the present invention over the prior art will become apparent from the detailed description of the drawings which follows, when considered with the attached figures.











DESCRIPTION OF THE DRAWINGS





FIG. 1

is a side view of a caddy of the present invention illustrated as supporting a texture gun and associated hopper as well as a container;





FIG. 2

is a first perspective view of the caddy illustrated in

FIG. 1

; and





FIG. 3

is a second perspective view of the caddy illustrated in FIG.


1


.











DETAILED DESCRIPTION OF THE INVENTION




The invention is a method and apparatus for supporting and transporting a texture gun which includes a hopper. In the following description, numerous specific details are set forth in order to provide a more thorough description of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without these specific details. In other instances, well-known features have not been described in detail so as not to obscure the invention.




In general, the present invention comprises a hopper caddy for supporting and transporting a texture gun having a hopper. An example of such a texture gun


20


is illustrated in FIG.


1


. As illustrated, the texture gun


20


includes a dispenser


22


. The dispenser


22


includes a handle


24


for gripping by an operator. The dispenser


22


also includes a trigger device


26


which actuates a means for propelling texture from the dispenser.




A hopper


26


is connected to the dispenser


22


. In one embodiment, the hopper


26


is defined by a perimeter wall


28


. At a top portion opposite its connection with the dispenser


22


, the hopper


26


has a generally square perimeter wall shape. At a lower portion at its connection with the dispenser


22


the wall defines a generally circular funnel-shaped outlet. The outlet of the hopper


26


is connected to an inlet of the dispenser


22


.




The hopper


26


defines an interior area for containing material such as wall texture. For this reason, the hopper


26


may be referred to as a materials or texture hopper.




It will be appreciated that the texture gun


20


may have a wide variety of configurations other than that described and illustrated. The manner of operation of the gun


20


, the shape and size of the hopper


26


and a number of other characteristics of the gun may vary.




In accordance with one embodiment of the invention, there is provided a hopper caddy


30


for supporting and transporting the texture gun


20


, including its hopper


26


. In general, the hopper caddy


30


comprises a support or platform which supports a raised frame. The frame is designed to support a hopper


26


in a raised and level position. The hopper caddy


30


is preferably movable for transporting a supported hopper


26


and associated dispenser


22


.




An embodiment of the hopper caddy


30


will now be described in detail with reference to

FIGS. 1-3

. Referring first to

FIG. 2

, the hopper caddy


30


includes a base or platform


32


. The base


32


has a first end


34


, a second end


36


, and a first side


38


and a second side


40


.




As best illustrated in

FIG. 1

, in one embodiment, the base


32


is generally planar. Referring to

FIG. 2

, the first and second sides


38


,


40


extend generally perpendicularly to the first end


34


. The first and second sides


38


,


40


extend generally parallel to one another. In a preferred embodiment, for reasons disclosed in more detail below, the second end


36


of the base


32


has a semi-circular shape.




The base


32


may have a wide variety of constructions. The base


32


has a top


44


and a bottom


46


. In one embodiment, the top


44


of the base


32


is defined by a generally flat plate


42


or deck.




In one embodiment, a rib


48


extends around the periphery of the plate


42


at the bottom of the base


32


. The rib


48


may comprise an element which is connected to the plate


42


, or be formed integrally therewith.




In one embodiment, the plate


42


is constructed of a rigid and durable material, such as steel. The steel may be painted to protect it and improve the aesthetic appeal of the caddy


30


. In one embodiment, the rib


48


comprises 0.75 inch square tubing which is welded to the steel plate


42


.




Means are provided for supporting a texture gun


20


including attached hopper


26


in an elevated position above the base


32


. In one embodiment, this means comprises a support structure which extends upwardly from the base


32


.




Referring to

FIG. 2

, in one embodiment, the support structure comprises a first support


50


and a second support


52


which support an elevated frame


54


. The first support


50


is located near the first side


38


of the base


32


, and the second support


50


is located near the second side


40


of the base.




In one embodiment, the first support


50


has a first leg


56


and a second leg


58


. A first end of the first leg


56


and second leg


58


is connected to the base


32


near its first side


38


. The first ends of the first and second legs


56


,


58


are spaced from one another. The legs


56


,


58


extend upwardly generally perpendicular to the plate


42


. In one embodiment, the legs


56


,


58


tilt inwardly towards one another to increase the load bearing capacity of the support


50


.




A second end of each leg


56


,


58


is positioned above the base


32


. A strut


60


extends between the second end of the first leg


56


and the second end of the second leg


58


.




In one embodiment, the strut


60


is positioned above the base


32


approximately 24 inches. Thus, the first and second legs


56


,


58


are approximately 20-24 inches long from end-to-end. In one embodiment, the strut


60


is approximately 10-12 inches long. Thus, the first and second legs


56


,


58


are spaced approximately 12-14 inches apart from one another. Preferably, all or substantially all of the strut


60


extends horizontally, generally parallel to the plate


42


.




The legs


56


,


58


and strut


60


may be constructed from a wide variety of materials. In one embodiment, the legs


56


,


58


and strut


60


are constructed from 0.75 inch square tubular steel. In this embodiment, the legs


56


,


58


may be connected to the base


32


by welding. The legs


56


,


58


and strut


60


may be constructed as a singular element, as illustrated in

FIGS. 1-3

in the form of an inverted “U”-shaped element.




In one embodiment, the second support


52


is similar to the first support


50


. The second support includes a first leg


62


and a second leg


64


. The first and second legs


62


,


64


each have a first end which is connected to the base


32


near its second side


40


. A strut


66


extends between the first and second legs


62


,


64


. The configuration and construction off the support


52


may be as described above with respect to the first support.




Preferably, the first leg


56


of the first support


50


and the first leg


62


of the second support


52


are positioned approximately the same distance along the respective first and second sides


38


,


40


from the first end


34


of the base


32


. Likewise, the first leg


58


of the first support


50


and the first leg


66


of the second support


52


are positioned approximately the same distance along the respective first and second sides


38


,


40


from the first end


34


of the base


32


. In other words, the first and second supports


50


,


52


are generally aligned with one another.




In one embodiment, the frame


54


comprises a generally “C” or “U”-shaped member which is supported by the first and second supports


50


,


52


. The frame


54


includes a first side


68


, a second side


70


, an end


72


extending between the sides


68


,


70


, and in one embodiment, at least one stop.




The first side


68


extends along the strut


60


of the first support


50


and is supported thereby. The second side


70


extends along the strut


66


of the second support


52


and is supported thereby. The end


72


comprises a member or element which extends between the first and second sides


68


,


70


of the frame


54


, preferably generally spanning the distance between the second leg


58


of the first support


50


and the second leg


64


of the second support


52


.




In one embodiment, a first stop


74




a


extends from the first side


68


of the frame


54


generally opposite its end


72


. The stop


74




a


extends inwardly towards the second support


52


. A second stop


74




b


extends from the second side


70


of the frame


54


generally opposite its end


72


. The second stop


74




b


extends inwardly towards the second support


52


. Preferably, free ends of the first and second stops


74




a,b


are separated by a gap.




The frame


54


may be constructed of a wide variety of materials. In one embodiment, the frame


54


is constructed of circular steel rod. In such arrangement, the frame


54


may be connected to the support


50


,


52


by welding.




As described, the first side


68


, second side


70


, end


72


and stops


74




a,b


define a generally peripheral support or frame. The frame


54


is open in its interior area for accepting the hopper of a texture gun therein, as described in more detail below.




In one embodiment, means are provided for rollably supporting the base


32


of the caddy


30


. In a preferred embodiment, a plurality of wheels


80


are provided for this purpose.




Referring to

FIG. 2

, in one embodiment, the caddy


30


includes four wheels


80


. Wheels


80


are located near the corners of the base


32


at the intersections of the sides


36


,


38


with the first end


34


. Wheels


80


are also located near the second end


36


.




The wheels


80


may be of a variety of types and be associated with the caddy


30


in a number of manners. In one embodiment, a mount


82


is located at the corners of the base


32


at the intersections of the sides


36


,


38


with the first end


34


. The mounts


82


are generally planar members connected to the rib


48


. A wheel


80


is connected to each mount


82


.




In one embodiment, the wheels


80


each have a supporting frame and axle. A tire or wheel is mounted on the axle.




In one embodiment, the wheels


80


located near the second end


36


of the base


32


are also mounted to a supporting member or mount


84


. This mount


84


comprises a portion of a container support, as described below.




In one embodiment, the hopper caddy


30


includes a container support. In a preferred embodiment, the support comprises an opening


88


in the plate


42


or deck. In one embodiment, the opening


88


is generally circular and sized to accept the base of a 5 gallon bucket.




Referring to

FIGS. 2 and 3

, means are provided for supporting a container placed in the opening


88


. In one embodiment, this means comprises a mount


84


which is located below the top


44


of the base


32


. In one embodiment, the mount


84


includes a first cross-member


90


which extends from the first side


38


to the second side


40


of the base


32


. The first cross-member


90


is aligned with the opening


88


, spanning the space below the opening. A second cross-member


92


extends generally perpendicular to the first cross-member


90


and is also aligned with the opening


88


, but located below it.




So arranged, the mount


84


has a “+” configuration. In one embodiment, each cross-member


90


,


92


comprises a generally flat plate member having a width of about 2-3 inches.




In one embodiment, a lip extends downwardly from the plate


42


and defines a periphery of the opening


88


. The mount


84


is located at the bottom of the lip.




It is contemplated that the caddy


30


may be configured other than as described above. The plate


42


need not comprise a planar member nor include a generally solid plate. For example, the plate


42


may comprise expanded metal. In one embodiment, the base


32


comprises an open frame without a plate


42


.




If the plate


42


is sufficiently rigid, the rib


48


may be omitted. Alternatively, the base


32


may be include a variety of other elements, such as ribs which extend from side to side or.end to end to increase the strength thereof.




The base


32


need not have the exact shape as described. For example, if the caddy


30


does not include a container support, the base


32


may be generally square or rectangular in shape.




In one embodiment, the frame


54


may be supported above the base


32


by other than the supports


52


,


54


as described. For example, the supports may include more than one leg or greater than two legs. The supports may comprise generally solid walls which extend upwardly from the base


32


. The supports may have a single leg and have a “T” shape.




The frame


54


may be other than as described. For example, the frame


54


may include portions of the first and second supports


52


,


54


. The frame


54


may comprise the two struts


60


,


66


and a member extending between the two struts


60


,


66


in similar fashion to the end


72


of the frame


54


as illustrated. The frame


54


may be connected to other than the struts


60


,


66


such as the legs of the supports


50


,


52


below the struts. In such an arrangement, the struts may also be omitted.




In general, it is desirable for the frame


54


to include at least two members for supporting opposing portions of a hopper. More desirably, the frame


54


is arranged to support at least three sides or portions of a hopper.




In one embodiment, the first and second supports


50


,


52


and frame


54


may be combined. For example, the entire supporting structure may comprise a generally “C” shaped wall which extends upwardly and has a top edge for supporting a hopper.




The frame


54


may be shaped or sized differently depending on upon the size and shape of a hopper to be supported. For example, if the hopper to be supported has a conically-shaped wall, the


54


may define a generally circular peripheral support.




As noted, the frame


54


is sized to engage a wall portion of a hopper. Thus, the lengths of the sides


68


,


70


and end


72


may vary dependant upon the size o the hopper to be supported.




The caddy


30


need not include wheels. Instead of four wheels, the caddy


30


may have as few as three or more than four wheels. The wheels need not be configured exactly as described. For example, wheels having a large diameter may be located near the first end


34


of the base


32


. Casters or smaller wheels may be located towards the second end


36


of the base


32


.




Members other than wheels may be used to rollably support the caddy


30


. For example, the base


32


may be supported on tracks.




The container support need not be configured as described. For example, the container support may comprise a member or members which extend upwardly from the plate


42


and define a container accepting/retaining structure. For example, a short wall may extend upwardly from the plate


42


and define a peripheral stop in which the container may be placed.




The container support may be configured to accept containers of other sizes and dimensions than as described. For example, the container support may be configured with a generally square opening for mating with a square container.




One or more elements of the caddy


30


may be combined into a single element (such as integral formation) or divided into additional elements. The elements of the caddy


30


may be connected by a variety of means, such as welding, nuts and bolts or other elements.




Use of the hopper caddy


30


as described above and illustrated in

FIGS. 1-3

will now be described in detail. A hopper


26


, either alone or as connected to a texture gun


20


, may be supported by the caddy


30


. It will be appreciated that while the invention is particularly suited to supporting a hopper associated with a texture gun, other hoppers or containers (including those not associated with a texture gun/dispenser) may be supported. In use, the hopper


26


is placed on the frame


54


, where it is supported.above the base


32


as illustrated in FIG.


1


.




The hopper


26


may be lowered onto the frame


54


from above, in the direction of the base


32


. In the preferred embodiment illustrated, the hopper


26


may also be directed into the spaced defined by the frame


54


by passing it between the opposing stops


74




a,b


, and then lowering it completely into a resting position on the frame


54


.




When positioned on the frame


54


, the frame


54


supports the hopper


26


. In particular, the first and second sides


68


,


70


, end


72


and stops


74




a,b


generally encircle the hopper


26


below its top edge. In a preferred embodiment, the caddy


30


is particularly adapted to support a hopper


26


configured as described above as including a wall which defines a generally square perimeter, the hopper having its largest dimension at an open top and which reduces in dimension towards its bottom or outlet end. In this arrangement, the frame


54


has portions engaging each of the four sides of the hopper


26


. The hopper


26


sits in the opening defined by the frame


54


to a point at which the size of the hopper


26


prevents the hopper


26


from moving downwardly with respect to the frame


54


.




When positioned on the frame


54


, the hopper


26


is supported in a level position with its open top facing upward. Texture and other material may be poured or directed into the hopper


26


when the hopper


26


is in this position.




Because the hopper


26


is supported above the base


32


, the hopper


26


does not engage the base


32


. Preferably, the hopper


26


is supported sufficiently above the base


32


that a texture gun dispenser


22


connected to the bottom or outlet of the hopper


26


is also supported above the base


32


.




As also illustrated in

FIG. 1

, a container


96


may be placed on the caddy


30


. In one embodiment, the container preferably comprises a bucket, such as the well-known 5 gallon bucket having a generally circular perimeter shape. The container may be used to hold texture or other material which is to be placed in the hopper


26


.




In a preferred embodiment, the container is positioned in the container support. In particular, the container is lowered into the opening


88


until the base of the container rests upon the mount


84


. Because the mount


84


is located below the top


44


of the plate


42


, the plate


42


surrounds a portion of the container, maintaining it in position.




The caddy


30


may be moved. The caddy


30


, either empty or as supporting either or both of a hopper


26


and container, may be rolled from one place to another using the wheels


80


.




The hopper caddy


30


of the present invention has numerous advantages. First, the caddy


30


is arranged to support a hopper, such as a texture hopper, in a stable and secure position. Texture or other material may be loaded into the hopper by a single person. The hopper is maintained in a level position so that material located in the hopper does not spill out.




Because the hopper is held in a secure position, a user need not hold onto the hopper. This frees the user's hands to engage in other activities, such as holding a container and pouring texture or other material into the hopper.




The container support is adapted to support a container on the caddy


30


. A user may locate a container of texture, water or other material on the caddy


30


. Material may be moved from the container to a hopper supported by the caddy.




A user may easily transport a hopper and/or a container with the caddy


30


. A hopper located on the caddy


30


is held in a secure position, and is not permitted to move. The hopper is held in a level position so that material does not spill or flow from its open top. A container is held securely in the container support, and also prevented from falling from the caddy


30


.




As one aspect of the invention, a hopper may easily be located on the frame. In the preferred embodiment, a hopper may be lowered into engagement with the frame. Alternatively, a portion of the hopper may be passed between the stops of the frame and then lowered into engagement with the frame. As will be appreciated, in the latter case, the height to which the hopper may need to be raised to place the hopper into engagement with the frame is substantially reduced. This may be important in the event the hopper is tall and a texture gun is connected to its lower end. In addition, if loaded, the hopper may be heavy. Likewise, a loaded hopper is more easily removed by slightly raising the hopper from the frame and then passing the hopper between the stops. At the same time, the two stops define member which aid in securely engaging a fourth side of the hopper to prevent undesirable movement of the hopper from the frame


54


.




The hopper caddy


30


in accordance with the invention solves the problems associated with using a hopper, such as that of a texture gun, of the prior art.




It will be understood that the above described arrangements of apparatus and the method therefrom are merely illustrative of applications of the principles of this invention and many other embodiments and modifications may be made without departing from the spirit and scope of the invention as defined in the claims.



Claims
  • 1. A caddy for supporting a hopper for use with a texture gun comprising:a base, said base having a top and a bottom, a first end and a generally opposing a second end, a first side and a generally opposing second side; a hopper support structure positioned nearer said first end than said second end of said base, said hopper support structure comprising: a first support extending upwardly from said base, said first support having an inverted “U”-shape, said first support including a first leg having a first end connected to said base and a second leg having a first end connected to said base, said first leg and said second leg spaced apart, and a strut connecting a second end of said first leg and a second end of said second leg, said strut extending generally horizontal to said base and positioned vertically above said base; a second support extending upwardly from said base, said second support having an inverted “U”-shape, said second support including a first leg having a first end connected to said base and a second leg having a first end connected to said base, said first leg and said second leg spaced apart, and a strut connecting a second end of said first leg and a second end of said second leg, said strut extending generally horizontal to said base and positioned vertically above said base, said first and second supports positioned at generally opposing sides of said base; a frame mounted to said first and second supports and supported above said base, said frame including a first side extending along said strut of said first support, a second side extending along said strut of said second support, a cross-member extending between a first end of each of said first and second sides of said frame and spanning a space between said first and second supports, a first stop extending inwardly from a second end of said first side of said frame a second stop extending inwardly from a second end of said second side of said frame, said first and second stops terminating with a gap therebetween through which a portion of a hopper may be extended into an interior defined by said frame, said frame supporting said hopper above said base by engaging said hopper when said hopper is located within said interior and lowered into engagement with said frame, at least a portion of said hopper located in an open space defined below said frame, above said base and between said first and second supports; a container support, said container support located at said second end of said base, said container support comprising an opening in said top of said base for accepting a container therein and a mount located below said top of said base for supporting a container positioned in said opening; and a plurality of wheels connected to said bottom of said base adapted to rollably contact a supporting surface.
  • 2. The caddy in accordance with claim 1, wherein said base has a semi-circular second end.
  • 3. The caddy in accordance with claim 1, wherein said base comprises a generally planar deck and at least one rib positioned at said bottom of said base supporting said planar deck.
  • 4. The caddy in accordance with claim 3 wherein said rib extends along the periphery of said planar deck.
Parent Case Info

This application claims the benefit of Provisional application Ser. No. 60/223,572, filed Aug. 7, 2000.

US Referenced Citations (10)
Number Name Date Kind
1102972 Woodworth Jul 1914 A
1559792 Seabold Nov 1925 A
2513630 Elliott Jul 1950 A
3292795 Chappell Dec 1966 A
4869518 Breveglierij et al. Sep 1989 A
4984515 Pivonka Jan 1991 A
5209517 Shagoury May 1993 A
5232274 John et al. Aug 1993 A
5893469 Nozawa Apr 1999 A
5996947 Palmieri, III Dec 1999 A
Provisional Applications (1)
Number Date Country
60/223572 Aug 2000 US