Anti-rotational system

Information

  • Patent Grant
  • 6394271
  • Patent Number
    6,394,271
  • Date Filed
    Monday, January 11, 1999
    25 years ago
  • Date Issued
    Tuesday, May 28, 2002
    22 years ago
Abstract
An anti-rotational system which restrains containers therein from rotating and contacting adjacent containers so as not to abrade the outer surface of the containers features an exterior box having at least one wall having a height at least as great as a height of the containers and a bottom structure. Furthermore, a plurality of pockets are formed within the exterior box structure. Each pocket has a rigid portion and an elastic portion. The rigid portion engages a maximum diameter of the container. The elastic portion flexes so as to allow the maximum diameter region of the container to pass thereby. Once the maximum diameter region of the container has passed by the elastic region, the elastic characteristics of the elastic region allows the elastic region to flex back towards its original position thus ensuring that the elastic portion contacts a smaller diameter of the container. Such secure retention of the container in the anti-rotational box prevents the container stored in the anti-rotational box from contacting each other and therefore abrading the outer surfaces of the container. As such, the containers stored and transported in such an anti-rotational box allows the containers to be refilled and reused. Another embodiment features the use of thickened wall ribs so as to make more rigid the anti-rotational system so that the full-depth walls do not warp. The thickened wall ribs connect to the wall of the exterior box structure, the bottom structure of the exterior box structure and a pocket formed within the interior of the exterior box structure. The use of the thickened wall ribs increases the number times a container can be re-used.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




This invention concerns a system for the storage of containers such as bottles. The invention more particularly concerns the retention of the bottles within a box so that the bottles do not rotate or contact each other which would result in the abrasion of the outer surface of the bottles. Such abrasions on the surface of the bottles render the bottles unusable for reuse.




2. Discussion of the Background




Previously existing systems or boxes for the storage of bottles, which are used to store the bottles or to transport the bottles from one location to another, have a number of shortcomings which result in the bottle being abraded on its outer surface. Such abrasions render the bottle unusable for refilling for reuse. Ideally, the boxes that hold the bottles would be capable of retaining in a single location each of the bottles so that the bottles do not contact each other.




Known prior art devices (Apps et. al., U.S. Pat. Nos. 5,405,042 and 5,320,245, both of which are incorporated herein by reference) provide dividers which are insertable into a box so that the bottles can be handled. The prior art discloses that different dividers can be inserted into the box so as to accommodate bottles of different sizes within one type of box. However, the boxes of the prior art allow the bottles arranged by the dividers to contact each other causing abrasions on the outer surfaces.




Another problem encountered in the prior art arises when many boxes are placed one on top of another. The box at the bottom of the pile of boxes supports the weight of the boxes and bottles above it through its side walls. In such a case, the side walls tend to warp outward. Such warpage tends to loosen the fit of the bottles situated in the box located at the bottom of the pile of boxes, thus causing the bottles to move about and to contact one another, where such contact causes abrasions on the surface of the bottles. Therefore, the bottles become unusable for refilling due to the abrasions. Ideally, the boxes that hold the bottles would be capable of supporting the weight of many boxes filled with bottles stacked above it, so that the box located at the bottom of the pile of boxes would be capable of retaining in a single location each of the bottles so that the bottles do not contact each other.




Thus, there is a need for a system, such as a box, which stores containers, such as bottles, that prevents the bottles from contacting each other during storage and transportation.




SUMMARY OF THE INVENTION




It is an object of the invention to provide a system which stores containers that prevents the containers from contacting each other's outer surfaces.




In one form of the invention the anti-rotational system takes the form of an exterior box having at least one full-depth wall having a height at least as great as a height of the containers and having a bottom structure. Formed within the exterior box structure are located pockets which retain the containers in the box. The pockets include a substantially rigid portion and an elastic portion. The substantially rigid portion engages a maximum diameter of the container and the elastic portion engages a diameter of the container which is smaller than the maximum diameter of the container with sufficient force so as to retain the container in the box. The containers have non-uniform diameters.




In yet another form of the invention, the anti-rotational system takes the form of an anti-rotational box, similar to the anti-rotational box described above, where containers having a uniform diameter are securable within the pockets formed in the exterior box.




In still yet another form of the invention, the anti-rotational system takes the form of a general structural piece, such as a shelf, having pockets wherein containers are securable.




In another form of the invention, the anti-rotational system includes reinforcement or thickened wall ribs connected to the full-depth walls, to the bottom structure and to portions of the structure forming the pockets.




Thus, Applicant's invention is superior to the prior art. Applicant's invention provides an anti-rotational system that prevents the inserted containers from rotating and contacting adjacent containers. Therefore, the containers can be refilled for reuse since the design on the outer surface is still identifiable. Thus, the reuse of the containers results in a cost savings and, also, results in conservation of natural resources. Such structural features distinguish Applicant's invention, structurally and functionally, over the prior art.











BRIEF DESCRIPTION OF THE DRAWINGS




A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:





FIG. 1

is a perspective view of an anti-rotational box;





FIG. 2

is a partial perspective cross-sectional view taken along the line


2





2


of

FIG. 1

;





FIG. 3

is an enlarged partial perspective cross-sectional view of the cross-section of

FIG. 2

taken from another angle;





FIG. 4

is an enlarged partial perspective cross-sectional view of the cross-section of

FIG. 2

taken from another angle;





FIG. 5

is a top view of the anti-rotational box;





FIGS. 6A and 6B

are partial cross-sections of a pocket of the anti-rotational box with a container inserted taken along lines


6


A—


6


A and


6


B—


6


B, respectively, of

FIG. 5

;





FIG. 7

is a perspective view of another embodiment of the anti-rotational system in the form of a box;





FIG. 8

is a partial perspective cross-sectional view taken along line


8





8


of

FIG. 7

;





FIG. 9

is an enlarged partial perspective cross-sectional view of the cross-section of

FIG. 8

taken from another angle; and





FIG. 10

is a top view of the second embodiment of the anti-rotational system.











DESCRIPTION OF THE PREFERRED EMBODIMENTS




Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, and more particularly to

FIG. 1

thereof, an anti-rotational box


10


has been created which provides for the anti-rotation of containers, such as bottles, inserted therein, which provides for abrasion resistance on the surfaces of the bottles due to rubbing of the bottles against adjacent bottles. The embodiment of this invention is displayed in

FIGS. 1-6

.

FIG. 1

is a perspective view of the anti-rotational box


10


showing the full-depth walls


12


and the bottom structure


14


.





FIG. 2

is a partial perspective cross-sectional view taken along line


2





2


of FIG.


1


.

FIG. 2

shows the placement of the full-depth walls


12


, the bottom structure


14


, the longitudinal ribs


16


, pairs of perpendicular ribs


22


, pocket


28




a


and parts of pockets


28




b


and


28




d


formed by the periphery of the connection between the longitudinal ribs


16


and the pairs of perpendicular ribs


22


. The pairs of perpendicular ribs


22


are substantially located between the bottom structure


14


and the longitudinal ribs


16


.





FIG. 3

is a partial perspective cross-sectional view taken at an angle near the bottom of the cross-section shown in FIG.


2


. Shown in

FIG. 3

are the placement of the full-depth walls


12


, the bottom structure


14


, and the placement of the longitudinal ribs


16


and the pairs of perpendicular ribs


22


to form the pockets


28




a,




28




b


and


28




d.


As shown in

FIGS. 2-5

, the longitudinal ribs


16


are oriented parallel to the longitudinal plane of the bottom structure


14


. Also as shown in

FIGS. 2-6

, opposing longitudinal ribs


16


form first sets of longitudinal ribs


18


and pairs of longitudinal ribs transverse to the first pair form a second set of longitudinal ribs


20


. The pairs of perpendicular ribs


22


are used to form a first set of pairs of perpendicular ribs


24


. Two more sets of pairs of perpendicular ribs


22


form second sets of perpendicular ribs


26


which are oriented substantially transverse to the first set of pairs of perpendicular ribs


24


. Each pair of perpendicular ribs


22


substantially faces towards a center of a container


30


contained in any one of the pockets


28




a


-


28




h.







FIG. 4

is a partial perspective cross-sectional view taken at an angle near the bottom of the cross-section shown in

FIG. 2

showing the features of the invention.





FIG. 5

is a top view of the anti-rotational box


10


showing pockets


28




a


-


28




h.



FIGS. 6A and 6B

are partial cross-sectional view through pocket


28




e


as shown in FIG.


5


.





FIGS. 6A and 6B

show the interaction between a container


30


and pocket


28




e


of the anti-rotational box


10


. The cross-section illustrated in

FIG. 6B

is located approximately forty-five degrees to the cross-section of illustrated in FIG.


6


A.

FIG. 6A

shows the container


30


and its interaction with the longitudinal ribs


16


. Furthermore, the opposing, parallel pairs of longitudinal ribs


16


can exemplify either one of the first and second sets of longitudinal ribs


18


,


20


, as shown in FIG.


6


A.

FIG. 6B

shows the container


30


and its interaction with the pairs of perpendicular ribs


22


. Additionally, the opposing, parallel sets of pairs of perpendicular ribs


22


can exemplify either one of the first and second sets of pairs of perpendicular ribs


24


,


26


, as shown in FIG.


6


B.




The anti-rotational box


10


is molded as a single structure. The height of the full-depth walls


12


of the anti-rotational box


10


are long enough to fully cover the height of the container


30


inserted therein. Such depth provides that multiple anti-rotational boxes


10


may be stacked on top of each other or cross stacked atop each other. The anti-rotational box is preferably made of a polymeric material. The difference in distance between the maximum diameter


32


of the container


30


and the length between the set of longitudinal ribs


18


,


20


is such that when the container


30


is inserted into the anti-rotational box


10


the longitudinal ribs


18


,


20


elastically press against the container


30


. The difference in distance between the maximum diameter


32


of the container


30


and the length between the sets of pairs of perpendicular ribs


24


,


26


is such that when the container


30


is inserted into the anti-rotational box


10


the perpendicular ribs


24


,


26


press against the container


30


. The container


30


is preferably made of PET. The container contains two liters of fluid. However, the invention can be used with any size of container.




In operation a container


30


is inserted into any one of the pockets


28




a


-


28




h.


For illustrations purposes assume pocket


28




d


or


28




e


is the pocket into which the container


30


is inserted. The container has a non-uniform diameter forming a waist. The container


30


has a maximum diameter


32


, a minimum diameter


34


, and a transition region


36


which is located in between the maximum and minimum diameters, as shown in

FIGS. 6A and 6B

. The maximum diameter


32


of the container


30


is first introduced past the longitudinal ribs


16


. The spacing between opposing longitudinal ribs


16


of a pocket


28




d


or


28




e


are such that the maximum diameter


32


of the container


30


tends to elastically deform the longitudinal ribs


16


outward. Upon further insertion of the container


30


into the pocket


28




d


or


28




e


the longitudinal ribs


16


, due to their elastic nature, tend to return towards their initial position as the longitudinal ribs


16


come into contact with the transition region


36


of the container


30


which has a diameter smaller than that of the maximum diameter


32


. As the maximum diameter


32


of the container


30


proceeds past the longitudinal ribs


16


the maximum diameter


32


of the container


30


comes into contact with the pairs of perpendicular ribs


22


. Opposing pairs of perpendicular ribs


24


,


26


are dimensioned a distance from each other so that the maximum diameter


32


of the container


30


contacts the pairs of perpendicular ribs


22


. Together, both opposing pairs of perpendicular ribs


24


,


26


form a substantially rigid portion. Together, both opposing pairs of first and second longitudinal ribs


18


,


20


form an elastic portion. Once the container


30


is fully inserted into the pocket


28




d


or


28




e


the pairs of perpendicular ribs


22


of the first and second sets of pairs of perpendicular ribs


24


,


26


, and the longitudinal ribs


16


of the first and second sets of longitudinal ribs


18


,


20


are in contact with the surface of the bottle


30


at the maximum diameter


32


and at the transition region


36


, respectively. The container


30


is securely supported by the anti-rotational box


10


. The container


30


, as secured above, does not rotate nor does it lean sufficiently so as to contact adjacent containers. Therefore, the surfaces of adjacent containers


30


do not touch and as such the adjacent surfaces of the containers


30


do not abrade each other. As such, the containers


30


may be refilled and reused.




The comer pockets


28




a,




28




c,




28




f


and


28




h


function in a manner similar to that of pockets


28




d


and


28




e.


As shown in

FIGS. 2-5

, the comer pockets


28




a,




28




c,




28




f


and


28




h


each have two longitudinal ribs


16


oriented approximately ninety degrees to each other, and each corner pocket has three parallel sets of pairs of perpendicular ribs


22


. Two of the three sets of pairs of perpendicular ribs


22


are oriented approximately ninety degrees to each other. The third set of the three sets of perpendicular ribs


22


being oriented approximately forty-five degrees away from being perpendicular to the other two sets of pairs of perpendicular ribs


22


. As discussed above, the longitudinal ribs


16


are dimensioned so as to elastically deform so as to enable the container to pass-by the longitudinal ribs


16


as the container is secured within the pocket and, as such, the longitudinal ribs


16


form an elastic portion. Also, as described above, the pairs of perpendicular ribs


22


are dimensioned so as to be substantially rigid and, as such, the pairs of perpendicular ribs


22


form a substantially rigid portion. The action of the longitudinal ribs


16


and the pairs of perpendicular ribs


22


is such that once the container is fully inserted into one of the corner pockets


28




a,




28




c,




28




f


or


28




h


the container


30


does not rotate and does not contact adjacent containers so that the containers


30


can be refilled and reused.




The side pockets


28




b


and


28




g


function in a manner similar to that of pockets


28




a,




28




c


-


28




f


and


28




h,


as described above. As shown in

FIGS. 2-5

, the side pockets


28




b


and


28




g


each have three longitudinal ribs


16


, where two of the three longitudinal ribs


16


are oriented approximately parallel to each other and the third of the three longitudinal ribs


16


is oriented approximately perpendicular to the other two longitudinal ribs


16


, and each side pocket has three parallel sets of pairs of perpendicular ribs


22


, where two of the three parallel sets of pairs of perpendicular ribs


22


are oriented approximately ninety degrees to each other. The third set of the three sets of perpendicular ribs


22


being oriented approximately forty-five degrees away from being perpendicular to the other two sets of pairs of perpendicular ribs


22


. As discussed above, the longitudinal ribs


16


are dimensioned so as to elastically deform so as to enable the container to pass-by the longitudinal ribs


16


as the container


30


is secured within the pocket and, as such, the longitudinal ribs


16


form an elastic portion. Also, as described above, the pairs of perpendicular ribs


22


are dimensioned so as to be substantially rigid and, as such, the pairs of perpendicular ribs


22


form a substantially rigid portion. The action of the longitudinal ribs


16


and the pairs of perpendicular ribs


22


is such that once the container is fully inserted into one of the side pockets


28




b


or


28




g


the container


30


does not rotate and does not contact adjacent containers so that the containers


30


can be refilled and reused.




Testing has determined that containers stored and transported in boxes of the prior art, without the anti-rotational system, can be reused approximately eight times before the containers are rendered useless. However, the results of testing show that containers stored and transported in the first embodiment of the anti-rotational system can be reused approximately twenty times.




Furthermore, one of ordinary skill in the art would be able to use the invention of the pocket configuration


28




a


-


28




h


of the anti-rotational system in a structure, such as a shelf, to secure containers therein, while the containers are stored and/or displayed. The invention of the anti-rotational system can also be used to secure containers having a single diameter along the length of the container's body.




When the anti-rotational box


10


, or any box of the prior art, is located at the bottom of a stack of boxes, the anti-rotational box


10


located at the bottom of the pile of boxes supports the weight (vertical load) of the boxes above it and it supports the weight of the containers, whether the containers are filled or not filled. The vertical load tends to cause the full-depth walls


12


to warp, bulge, flex, or buckle outward. The warpage causes the containers secured inside the anti-rotational box


10


to become unsecured, thus causing adjacent containers to contact one another resulting in abrasions of their surfaces.




A second embodiment of the invention, which is preferably used in conjunction with the first embodiment, is displayed in

FIGS. 7-10

.

FIG. 7

is a perspective view of an anti-rotational box


48


which provides for the anti-rotation of containers, such as bottles, inserted therein, which provides for abrasion resistance on the surfaces of the bottles due to rubbing of the bottles against adjacent bottles, while the anti-rotational box


48


is subjected to large vertical loads transmitted through the full-depth walls


12


. The vertical loads are created when many boxes are stacked one on top of another. Such stacking of the anti-rotational boxes


48


occurs in warehouses and in trucks during storage and transport of the containers. Like reference numerals designate identical or corresponding parts throughout

FIGS. 1-10

, and as such a description of previously described features is not provided.




In order to prevent the above-described warpage of the full-depth walls


12


which are subject to the large vertical load that results in the abraded surfaces of the containers, multiple thickened wall ribs


50


,


52


,


54


,


56


,


58


and


60


are attached along the vertical length of the inner surface of the full-depth walls


12


, as shown in

FIGS. 7-10

. Thickened wall ribs


50


,


52


,


54


,


56


,


58


and


60


reinforce the full-depth side walls


12


which adds rigidity to the overall structure of the anti-rotational box


48


.





FIG. 8

is a partial perspective cross-sectional view taken along line


8





8


of FIG.


7


.

FIG. 8

shows the placement of two of the thickened wall ribs


50


,


52


connected to the full-depth walls


12


, the bottom structure


14


and to material that form the pockets


28




a


-


28




h.


Thickened wall rib


52


has a small width near a free edge of the full-depth wall


12


and tapers to a large width where thickened wall rib


52


meets the material which forms the pockets


28




a


-


28




h.


Thickened wall rib


50


tapers in a manner similar to that of thickened wall rib


52


, however, thickened wall rib


50


has a small width near an open section, such as a handle, as shown in FIG.


8


.





FIG. 9

is a partial perspective view taken at an angle near the bottom of the cross-section shown in FIG.


8


. Shown in

FIG. 9

are the placement of the thickened wall ribs


50


,


52


. Thickened wall rib


56


is shaped similarly to thickened wall rib


50


. Thickened wall ribs


54


,


58


and


60


are shaped similarly to thickened wall rib


52


. Placement of the remaining thickened wall ribs


54


,


56


,


58


and


60


are symmetrically located about the anti-rotational box


48


.





FIG. 10

is a top view of the anti-rotational box


48


showing the placement of the thickened wall ribs


50


,


52


,


54


,


56


,


58


and


60


around the inner surface of the full-depth walls


12


.




The results of testing show that containers stored and transported in a device incorporating the features of both the first and second embodiments of the anti-rotational system


48


can be reused approximately thirty times, even when a vertical load of approximately two tons is applied to the full-depth walls


12


of the anti-rotational system


48


.




Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.



Claims
  • 1. A system for holding containers, comprising:a structure for storing a container; and a plurality of pockets within said structure, wherein said plurality of pockets have a substantially rigid portion for engaging a first diameter of the container and an elastic means for engaging a second diameter of the container with a force selected to prevent rotation of the container in said structure.
  • 2. The system according to claim 1, wherein said structure includes at least one wall configured to have a height at least as large as a predetermined height.
  • 3. The system according to claim 2, further comprising a bottom structure connected to said at least one wall.
  • 4. A system as recited in claim 3, wherein said substantially rigid portion includes pairs of perpendicular ribs connected to said structure, said pairs of perpendicular ribs connected to said bottom structure of said structure.
  • 5. A system as recited in claim 4, wherein said pairs of perpendicular ribs are substantially located between said bottom structure and said elastic means.
  • 6. A system as recited in claim 4, wherein said substantially rigid portion includes first sets of pairs of perpendicular ribs, each first set of pairs of perpendicular ribs formed by two substantially parallel pairs of perpendicular ribs, and second sets of pairs of perpendicular ribs, each second set of pairs of perpendicular ribs formed by two substantially parallel pairs of perpendicular ribs, said second sets of pairs of perpendicular ribs oriented in planes being substantially perpendicular to planes in which said first sets of pairs of perpendicular ribs exist.
  • 7. A system as recited in claim 6, wherein said pairs of perpendicular ribs are substantially located between said bottom structure and said elastic means.
  • 8. A system as recited in claim 4, wherein said elastic means includes longitudinal ribs connected to said structure.
  • 9. A system as recited in claim 8, wherein said longitudinal ribs being located above said bottom structure and being substantially parallel to said bottom structure.
  • 10. A system as recited in claim 9, wherein said elastic means includes first sets of longitudinal ribs, each first set of longitudinal ribs formed by two parallel facing longitudinal ribs, and second sets of longitudinal ribs, each second set of longitudinal ribs formed by two parallel facing longitudinal ribs, said second sets of longitudinal ribs oriented substantially transverse to said first sets of longitudinal ribs.
  • 11. A system as recited in claim 10, further comprising at least one thickened wall rib connected to said at least one wall, said bottom structure and at least one of said plurality of pockets.
  • 12. A system as recited in claim 10, further comprising at least four thickened wall ribs; wherein said at least one wall includes four walls; wherein each of said four thickened wall ribs extend substantially an entire height of each of said four walls; wherein a first thickened wall rib of said four thickened wall ribs being connected to a first wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a second thickened wall rib of said four thickened wall ribs being connected to a second wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a third thickened wall rib of said four thickened wall ribs connected to a third wall of said four walls, said bottom structure and at least one of said plurality of pockets; and wherein a fourth thickened wall rib of said four thickened wall ribs being connected to a fourth wall of said four walls, said bottom structure and at least one of said plurality of pockets.
  • 13. A system as recited in claim 8, further comprising at least one thickened wall rib connected to said at least one wall, said bottom structure and at least one of said plurality of pockets.
  • 14. A system as recited in claim 8, further comprising at least four thickened wall ribs; wherein said at least one wall includes four walls; wherein each of said four thickened wall ribs extend substantially an entire height of each of said four walls; wherein a first thickened wall rib of said four thickened wall ribs being connected to a first wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a second thickened wall rib of said four thickened wall ribs being connected to a second wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a third thickened wall rib of said four thickened wall ribs connected to a third wall of said four walls, said bottom structure and at least one of said plurality of pockets; and wherein a fourth thickened wall rib of said four thickened wall ribs being connected to a fourth wall of said four walls, said bottom structure and at least one of said plurality of pockets.
  • 15. A system as recited in claim 4, further comprising at least one thickened wall rib connected to said at least one wall, said bottom structure and at least one of said plurality of pockets.
  • 16. A system as recited in claim 4, further comprising at least four thickened wall ribs; wherein said at least one wall includes four walls; wherein each of said four thickened wall ribs extend substantially an entire height of each of said four walls; wherein a first thickened wall rib of said four thickened wall ribs being connected to a first wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a second thickened wall rib of said four thickened wall ribs being connected to a second wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a third thickened wall rib of said four thickened wall ribs connected to a third wall of said four walls, said bottom structure and at least one of said plurality of pockets; and wherein a fourth thickened wall rib of said four thickened wall ribs being connected to a fourth wall of said four walls, said bottom structure and at least one of said plurality of pockets.
  • 17. A system as recited in claim 3, further comprising at least one thickened wall rib connected to said at least one wall, said bottom structure and at least one of said plurality of pockets.
  • 18. A system as recited in claim 3, further comprising at least four thickened wall ribs; wherein said at least one wall includes four walls; wherein each of said four thickened wall ribs extend substantially an entire height of each of said four walls; wherein a first thickened wall rib of said four thickened wall ribs being connected to a first wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a second thickened wall rib of said four thickened wall ribs being connected to a second wall of said four walls, said bottom structure and at least one of said plurality of pockets; wherein a third thickened wall rib of said four thickened wall ribs connected to a third wall of said four walls, said bottom structure and at least one of said plurality of pockets; and wherein a fourth thickened wall rib of said four thickened wall ribs being connected to a fourth wall of said four walls, said bottom structure and at least one of said plurality of pockets.
Priority Claims (1)
Number Date Country Kind
980170 Mar 1998 MX
Parent Case Info

This application is a continuation application of parent application Ser. No. 09/127,803, filed Aug. 3, 1998 now U.S. Pat. No. 6,041,927. This application also claims priority from Mexican Patent Application No. 980170 which is hereby incorporated by reference.

US Referenced Citations (5)
Number Name Date Kind
3998328 Box Dec 1976 A
4585137 Poutiainen et al. Apr 1986 A
4911300 Colonna Mar 1990 A
5702022 Umiker Dec 1997 A
6041927 Vallve et al. Mar 2000 A
Continuations (1)
Number Date Country
Parent 09/127803 Aug 1998 US
Child 09/227880 US