Nursing bottle with gripping recesses

Information

  • Patent Grant
  • 6305562
  • Patent Number
    6,305,562
  • Date Filed
    Friday, August 9, 1996
    28 years ago
  • Date Issued
    Tuesday, October 23, 2001
    22 years ago
Abstract
Nursing bottle providing improved ease of gripping during use has a first depression in its front surface for receiving an infant's fingers and a second depression on its back surface for receiving an infant's thumbs. Preferably, the first and second depressions are displaced longitudinally with respect to one another.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




The present invention relates generally to a baby bottle from which an infant may drink a liquid such as milk, juice or water. More particularly, the present invention relates to a baby bottle which provides improved ease of gripping during use. Even more particularly, the present invention relates to a baby bottle comprising a depression on the front side thereof for receiving an infant's fingers during use and a depression on the rear side thereof for receiving an infant's thumbs during use.




2. Description of the Prior Art




Conventional nursing bottles are usually of a substantially cylindrical configuration in which the bottle and the attached nipple have a common longitudinal axis. These types of bottles are generally referred to as straight nursing bottles and have deficiencies in that the base of the bottle must be tipped increasingly upwardly as the contents of the bottle are consumed in order to keep the nursing fluid available to the opening in the nipple. Tipping the bottle upward results in tipping the infant's head back or inclining the infant in a more supine position in order to facilitate feeding. Such positioning of the infant during feeding is not recommended by pediatricians due to the possibility of fluid entering the Eustachian tube and possibly contributing to inner ear infections.




Angled bottles were developed to facilitate feeding without the need to incline the infant or for the infant to tilt his or her head back. See, e.g. U.S. Pat. Nos. 4,676,387 to Stephenson and 4,832,213 to Sharon. These bottle designs aid in keeping the nipple opening contiguous with the fluid inside the bottle while mitigating the need to tilt the bottle. These designs are deficient in instances where the infant holds the bottle for himself or herself since they lack a grippable area which is suitable for an infant's hands.




Grippability was incorporated in an angled bottle as shown in Dansfield, U.S. Pat. No. 4,867,325. This bottle is toroidal in shape with grippable sides. The design is intended to produce a highly stable bottle when placed on its side and also to provide a large surface area for rapidly warming the contents. This bottle is deficient in that the means of gripping is not ergonomically acceptable for a self-feeding infant (the wrists would be bent in an unnatural position) and cleaning of the bottle would be extremely difficult.




Straight bottles which are more easily gripped by self-feeding infants are shown in U.S. Pat. Nos. 4,570,808 to Campbell and 4,813,556 to Lawrence. The Campbell patent discloses a bottle which has a grippable area for the infant's hands; however, the bottle's straight design requires tipping of the bottle to fully deliver its contents. The Lawrence patent discloses a bottle which has a bellows-shaped top near the open end and a pair of opposing recesses which form portions of the body surface into a pair of handles to facilitate gripping during self-feeding. The purpose of the bellows is to remove air from the container since this section of the bottle is collapsible. This bottle is deficient in that the pair of recesses therein are not ergonomically positioned so as to allow the infant to place his or her thumbs in a natural position during feeding.




SUMMARY OF THE INVENTION




In accordance with the present invention, there is provided an infant's feeding bottle, which may be either of the “straight” type or the “angled” type, having a pair of indentations or depressions therein. The first of these indentations or depressions is located on the front of the bottle and is adapted to receive one or more of an infant's finger when the bottle is in use. The second indentation or depression is located on the back of the bottle generally opposite the location of the first indentation and is adapted to receive at least one of the infant's thumbs while the bottle is being used. The indentations are preferably located closer to the open end of the feeding bottle than to its closed end so as to make it easier for the infant to manipulate the bottle during use.




In addition to defining a first region in the bottle for receiving one or more of the infants fingers and a second region for receiving one or both of the infant's thumbs, the pair of opposed indentations or depressions reduce, in the vicinity of their location, the volume of the bottle available for containing fluids. The depressions accordingly aid in keeping small amounts of fluid available to the opening in the affixed nipple when the bottle is being used.




Preferably, the indentation which is adapted to receive one or more of the infant's fingers is of sufficient size so as to be able to receive several of the infant's fingers. More preferably, the finger receiving indentation is of a size sufficient to receive all eight of the infant's fingers. Similarly, the second, or thumb receiving, indentation is of a size sufficient to accommodate at least one of the infant's thumbs. Preferably, the second indentation is of a size sufficient to receive both of the infant's thumbs. It will be understood that each of the first and second indentations in the bottle of the invention may be sized for different ages or different age ranges. For example, the first and second indentations provided in a feeding bottle intended for use by an infant whose age is 6 months will be smaller than the respective indentations provided in a bottle intended for use by an infant whose age is one year.




In another aspect of the invention, the first and second indentations or depressions are displaced longitudinally with respect to each other. Preferably, the first indentation, i.e. the finger receiving indentation, is positioned further from the open end of the bottle than the second indentation, i.e. the thumb receiving indentation, so as to accommodate the anatomical configuration and positioning of the infant's hands during use of the bottle. This placement of the first and second indentations in the feeding bottle of the present invention allow the infant's arms and hands to assume a natural and comfortable position during use.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a perspective view of an embodiment of a nursing bottle according to the present invention;





FIG. 2

is a perspective view of the nursing bottle of

FIG. 1

being used by an infant, the infant's right hand and mouth being shown in phantom;





FIG. 3

is a cross-sectional view of the bottle of

FIG. 1

taken along line


3





3


of

FIG. 2

, said bottle being illustrated in the fashion in which it might be held in the hands of an infant during use;





FIG. 4

is a front elevational view of the bottle of

FIG. 1

;





FIG. 4A

is a cross-sectional view taken along line


4


A—


4


A of

FIG. 4

;





FIG. 4B

is a cross-sectional view taken along line


4


B—


4


B of

FIG. 4

;





FIG. 5

is a rear elevational view of the bottle of

FIG. 1

;





FIG. 5A

is a cross-sectional view taken along line


5


A—


5


A of

FIG. 5

;





FIG. 5B

is a cross-sectional view taken along line


5


B—


5


B of

FIG. 5

;





FIG. 6

is a left side elevational view of the bottle of

FIG. 1

;





FIG. 7

is a right side elevational view of the bottle of

FIG. 1

;





FIG. 7A

is a cross-sectional view taken along line


7


A—


7


A of

FIG. 7

;





FIG. 7B

is a cross-sectional view taken along line


7


B—


7


B of

FIG. 7

;





FIG. 8

is a cross-sectional view taken along line


8





8


of

FIG. 4

;





FIG. 9

is a longitudinal section taken along line


9





9


of

FIG. 6

;





FIG. 10

is a cross-sectional view similar to FIG.


8


and showing a unique plane ABCD passing through the intersecting longitudinal axes of the upper and lower portions of the bottle of

FIG. 1

;





FIG. 11

is a cross-sectional view similar to FIG.


9


and showing a unique plane KLMN passing through the longitudinal axis of the body portion of the bottle and forming an angle of 90° with plane ABCD;





FIG. 12

is a perspective view showing the intersection of plane ABCD with plane KLMN to form an angle of 9°;





FIG. 12A

is a cross-section taken along line


12


A—


12


A of

FIG. 12

;





FIG. 13

is a perspective view of a second preferred embodiment of the present invention wherein the bottle is in the form of a straight cylinder and has no angled portions;





FIG. 14

is a front elevational view of the bottle of

FIG. 13

;





FIG. 14A

is a cross-section taken along line


14


A—


14


A of

FIG. 14

;





FIG. 15

is a rear elevational view of the bottle of

FIG. 13

; and





FIG. 16

is a cross-section taken along line


16





16


of FIG.


14


.











DESCRIPTION OF THE PREFERRED EMBODIMENT




Referring now to

FIGS. 1-12

of the appended drawings, there is shown one preferred embodiment of a feeding bottle in accordance with the present invention. Feeding bottle


20


, together with nipple


70


and retaining collar


80


, constitute, when the nipple/collar assembly


90


is secured to the open end of the bottle, a feeding bottle system


100


which can be used to feed liquids to an infant. It will be understood that retaining collar


80


includes interiorly located threads, which threads, however, are not illustrated in the drawings.




As seen in the drawings, bottle


20


is hollow and comprises a lower, or body, portion


30


; an intermediate, or neck, portion


40


; and an upper, or head, portion


50


.




Bottle


20


comprises a front surface


22


which is most clearly seen in

FIG. 4

of the drawings, and a rear or back surface


24


, which is most clearly seen in FIG.


5


. The bottle further includes a first, or left, side


26


which is seen in

FIG. 6 and a

second, or right, side


28


which is seen in FIG.


7


.




Body portion


30


has a closed end


32


which constitutes the lowermost, closed end of bottle


20


. As can be seen in

FIG. 8

, closed end


32


is slightly inwardly recessed.




Head portion


50


terminates at its upper end in a circular portion


53


which carries male threads


54


which are adapted to receive the aforementioned interiorly located threads of collar


80


in mating relationship. Head portion


50


further includes an open end


52


which constitutes the uppermost, open end of bottle


20


. Head portion


50


terminates at its lower end in a region


300


that is above and abuts the depressions


60


,


62


.




Referring particularly to

FIG. 8

, it will be understood that body portion


30


has a longitudinal axis


36


which can be extended beyond the outer surface of bottle


20


as indicated by dot-and-dash line


36




a


at the bottom of the bottle and by dot-and-dash line


36




b


at the top of the bottle. Similarly, head portion


50


has a longitudinal axis


56


which can be extended beyond the outer surface of the bottle as indicated by dot-and-dash line


56




a


(seen in the lower right hand portion of

FIG. 8

) and by dot-and-dash line


56




b


at open end


52


. The head region


300


in the head portion


50


, which is above and abuts the depressions


60


,


62


, has a longitudinal axis extending therethrough. The longitudinal axis of the head region


300


is coaxial with the longitudinal axis of the head portion


50


, but is not coaxial with the longitudinal axis through the body portion


30


. Still referring to

FIG. 8

, it will be seen that axis


36


and axis


56


intersect at intersection point


92


located interiorly of neck portion


40


to form an angle α. In angled bottle


20


, angle α may suitably range from about 135° to about 175°. Preferably, angle α ranges from about 145° to about 165°. Even more preferably, angle α ranges from about 150° to about 155°.




Bottle


20


further comprises two indentations or depressions. As may be seen in

FIG. 4

, the first such indentation or depression, identified by numeral


60


, is located in the front surface


22


of bottle


20


. As may be seen in

FIG. 5

, the second such depression or indentation, identified by numeral


62


, is located in the rear, or back, surface


24


of bottle


20


. Preferably, first depression


60


is larger than second depression


62


. As can be seen in FIG.


2


and

FIG. 3

, depression


60


on the front of bottle


20


is adapted to receive the fingers of an infant while the bottle is being used. Although only the fingers of the infant's right hand are shown (in phantom) in

FIG. 2

, it will be understood that the infant may also place one or more fingers of his or her left hand in indentation


60


.




Similarly, depression


62


on the rear of bottle


20


is adapted to receive an infant's thumbs when the bottle is being used.

FIG. 2

shows the infant's right thumb (in phantom) in place in depression


62


. It will be understood that the infant may also place the thumb of his or her left hand into indentation


62


.

FIG. 3

illustrates both of the infant's thumbs positioned in depression


62


.




The shape of the bottle, as viewed along its cross-section through the two depressions as shown in

FIG. 3

, is comprised of a central region having a width and a pair of transverse end regions. The width of each of the transverse end regions is greater than the width of the central region, which is comprised of two continuous arcuate lateral sides. Each lateral side begins at a first transverse end region and terminates at a second transverse end region.




As mentioned, first depression


60


, which is adapted to receive the infant's fingers, is preferably larger in size than second depression


62


, which is adapted to receive the infant's thumbs. Since the infant's fingers occupy more space than the infant's thumbs, the infant will soon learn that it is easier to place the fingers in larger-sized depression


60


than in the smaller sized depression


62


. Though smaller in size than depression


60


, second depression


62


readily accepts the infant's thumbs. Thus, when first depression


60


is made larger than second depression


62


, the infant is encouraged and with use of the bottle soon learns to place the fingers in first depression


60


and the thumbs in second depression


62


. When this happens, the infant, during use of the bottle, holds the bottle in the desired position, shown in

FIG. 2

, in which the closed end


32


of the bottle is tilted upwardly from the infant's mouth


95


.




In the preferred embodiment under discussion, and as shown in

FIG. 7A

, the lower reach of body portion


30


is substantially circular in cross-section. As mentioned above, and as can be seen in

FIG. 7B

, portion


53


at the open end of bottle


20


is also substantially circular in cross-section. Portion


53


is thus adapted to receive, in well known fashion, nipple/collar assembly


90


for completing the feeding bottle system


100


.




As seen in

FIGS. 6 and 7

, first depression


60


is located between open end


52


and closed end


32


of bottle


20


. Second depression


62


is located closer to the open end of the bottle than first depression


60


. In other words, in the preferred embodiment, depressions


60


and


62


are longitudinally offset with respect to one another. As seen in

FIG. 7

, depression


60


has a geometric centerpoint


66


and depression


62


has a geometric centerpoint


68


. As seen in

FIGS. 7 and 8

, a line


69


which passes through centerpoints


66


and


68


forms an angle β with the longitudinal axis


36


of body portion


30


. It will be understood that depressions


60


and


62


will be longitudinally offset with respect to each other so long as angle β is less than


90


°. Angle β may suitably range from about 20° to about 60°. Preferably angle β ranges from about 30° to about 50°, more preferably from about 40° to about 45°.




The perimeter of depression


60


at front surface


22


of bottle


20


, when viewed in plan, and as shown in

FIG. 4

, is generally elliptical in shape. The walls of depression


60


taper in arcuate fashion and substantially uniformly to centerpoint


66


. A longitudinal section of depression


60


is shown in

FIG. 4A

; a cross-section of depression


60


is shown in FIG.


4


B. In one embodiment, depression


60


has a length, L


1


, on the order of 2⅜ inches, and a width, W


1


, on the order of 1.5 inches. It will be recognized that the foregoing dimensions may be varied depending on the specific size desired for depression 60.




The perimeter of depression


62


at front surface


22


of bottle


20


, when viewed in plan, and as shown in

FIG. 5

, is generally elliptical in shape, being longer than it is wide. Depression


62


has a pair of small, inwardly recessed regions


63


,


63


near its bottom, one on each side of longitudinal axis


36


. The walls of depression


62


taper in arcuate fashion and substantially uniformly to its centerpoint


68


. A longitudinal section of depression


62


is shown in

FIG. 5A

; a cross-section of depression


62


is shown in FIG.


5


B. In one embodiment, depression


62


has a length, L


2


, on the order of 2 inches, and a width, W


2


, on the order of 1.5 inches. It will be recognized that the foregoing dimensions may be varied depending on the specific size desired for depression


62


.




The depth, D


1


, of depression


60


and the depth, D


2


, of depression


62


may vary depending on the desired size of the depression. Typically D


1


may range from about 0.25 inch to about 0.75 inch and D


2


may range from about 0.125 inch to about 0.75 inch.





FIG. 9

is a cross-sectional view of bottle


20


taken along line


9





9


of FIG.


6


and shows axis


36


, axis


56


, the point


92


at which axis


36


and axis


56


intersect each other, depression


62


, centerpoint


66


of depression


62


, closed end


32


and open end


52


.





FIG. 10

shows unique plane ABCD passing through both longitudinal axis


36


of body portion


30


and longitudinal axis


56


of upper portion


50


. Plane ABCD divides first depression


60


into two parts


60




a,




60




b


and also divides second depression


62


into two parts


62




a,




62




b.


Part


60




a


and part


62




a


are seen in FIG.


10


. See also

FIGS. 4 and 5

. In the preferred embodiment of angled bottle


20


, plane ABCD divides first depression


60


into identical halves and also divides second depression


62


into identical halves, said identical halves being mirror images.





FIG. 11

shows a second unique plane KLMN which passes through longitudinal axis


36


of body portion


30


of bottle


20


and forms an angle of 90° with above-mentioned plane ABCD. It will be understood that depression


62


is located on one side of plane KLMN and depression


60


(not shown in

FIG. 11

) is located on the other side of plane KLMN.





FIG. 12

is a perspective view of bottle


20


showing the intersection of plane ABCD and plane KLMN to form an angle of 90°. As seen in

FIG. 12A

, first depression


60


lies on one side of plane KLMN, while second depression


62


lies in the opposite side thereof. Plane ABCD divides depression


60


and depression


62


into identical halves.




In an angled bottle according to the invention, the bottle includes a concave region on its front surface and a convex region on its back surface. The first indentation or depression—the one designed for receiving the infant's fingers—is located in the general vicinity of the concave region. The second indentation or depression—the one adapted to receive the infant's thumbs—is located in the general vicinity of the convex region. Preferably, the first indentation is larger than the second indentation.




A sequential monadic home use test was conducted to determine the ease with which an infant or young child is able to grasp angled bottle


20


of the invention compared to the ease of gripping a control bottle. The control bottle which was used was similar to that disclosed in U.S. Pat. No. 4,676,387 to Stephenson and was substantially identical to inventive bottle


20


illustrated in

FIGS. 1-12

of the drawings except that it did not have depressions


60


and


62


. Parents of infants and young children were selected to form a test panel which was divided into two groups identified as Group A and Group B. Each of the two groups had an approximately equal number of panelists. The children of the parents constituting the test panel ranged in age from 4 months to 23 months in age. The Group A parents were given the inventive bottle of

FIGS. 1-12

and a supply of nipples and retaining collars. The Group A parents were asked to use the mentioned inventive bottle for one week. The Group B parents were given the mentioned control bottle, along with a supply of nipples and retaining collars, and asked to use the same for one week. At the end of the first week, the panelists were asked to rate the parameter “Ease for Child to Grip/Hold” according to the following standards:



















Standard




Rating













Extremely easy to hold




5







Very easy to hold




4







Somewhat easy to hold




3







Slightly easy to hold




2







Not at all easy to hold




1















During the second week, the Group A parents used the control bottle, while the Group B parents used the inventive bottle. At the end of the second week, the parents completed the same questionnaire and rated the particular bottle which they used during the second week.




The results of this home use test comparing the two bottles are set forth in TABLE 1. As seen in the Column entitled “OVERALL SAMPLE” in TABLE 1, seventy-two percent (72%) of the panelists rated the inventive bottle as being “extremely easy” or “very easy” for the child to grip/hold. In contrast, only fifty percent (50%) of the panelists rated the control bottle as being “extremely easy” or “very easy” for the child to grip/hold. The 72% rating achieved by the inventive bottle versus the 50% rating achieved by the control bottle is significantly different at P≦0.01. These test results demonstrate that the bottle of the invention with its depressions


60


and


62


is significantly easier for the child to grip/hold than the control bottle which had no such depressions.


















TABLE 1













OVERALL SAMPLE





AGES 4-10 MONTHS





AGES 10+ TO 23 MONTHS























Current





Prototype





Current





Prototype





Current





Prototype







n = 86





n = 88





n = 44





n = 45





n = 42





n = 43


























Extremely easy (5)




19%





34%





20%





36%





17%





33% 






Very easy (4)




31%





38%





27%





33%





36%





42% 






Somewhat easy (3)




26%





13%





23%





16%





29%





9%






Slightly easy (2)




10%





 8%





14%





 7%





 7%





9%






Not at all easy (1)




14%





 8%





16%





 9%





12%





7%






Mean/Significance




3.30




***




3.82





3.23




**




3.80





3.38




*




3.84






% Top 2 Box Significance




50%




***




72%





47%




**




69%





53%




**




75% 











SIGNIFICANCE LEVELS:










* = Significant at p ≦ .10










** = Significantly different at p ≦ .05










*** = Significantly different at p ≦ .01













When the present invention is embodied in an angled bottle such as shown in

FIGS. 1-12

of the accompanying drawings, the nipple tends to be kept filled with fluid while minimizing the need to tilt the bottle. TABLE 2 sets forth the Maximum Volume, Deliverable Volume, Undeliverable Volume and Maximum Volume Delivered for several commercially available baby bottles as well as the inventive bottle shown in

FIGS. 1-12

. The bottles were classified as shown in the left hand column of TABLE 2. The data in TABLE 2 demonstrates, as expected, the advantage of angled bottles over straight bottles in efficiently delivering liquid to the nipple. In general, the straight bottles deliver only about half their capacity while the angled bottles generally deliver more than about 75% of their capacity. The inventive bottle of

FIGS. 1-12

delivers 85% of its capacity, a value which is higher than that of 3 of the angled bottles and less than 2 of those bottles.




Referring now to

FIGS. 13-16

, bottle


120


is shown in the form of a straight cylinder, i.e., it is not angled in the manner of bottle


20


of FIG.


1


. Bottle


120


has a front surface


122


and rear, or back, surface


124


. Bottle


120


is closed at its bottom end


132


and open at its top end


152


. Proximate to the top end


152


are male threads


154


which are adapted to receive the aforementioned interiorly located threads of collar


80


in mating relationship.




Referring particularly to

FIG. 13

, it will be understood that the bottle


120


has a longitudinal axis


136


which can be extended beyond the outer surface of bottle


120


as indicated by dot-and-dash line


136




a


at the bottom of the bottle and by dot-and-dash line


136




b


at the top of the bottle. Front surface


122


includes a first depression


160


while back surface


124


includes a second depression


162


, said depressions being analogous to depressions


60


and


62


, respectively, of bottle


20


. First depression


160


and second depression


162


are longitudinally offset one with respect to the other, second depression


162


being closer to open end


152


of the bottle. As seen in

FIG. 14A

, plane PQRS passing through the longitudinal axis


136


of bottle divides the bottle into a front half


176


and a back half


178


. Depression


160


has a geometrical centerpoint


166


and depression


162


has a geometrical centerpoint


168


. As seen in

FIG. 16

, a line


169


joining centerpoints


166


and


168


intersects longitudinal axis


136


to form an angle β which must be less than 90°. Preferably, in bottle


120


, angle β ranges from about 55° to about 85°. More preferably, angle β ranges from about 65° to about 75°. Most preferably, angle β is about 70°. It will be understood that bottle


120


has the same “easy grip/hold” features mentioned earlier herein for bottle


20


and it is also less expensive and less complex to manufacture.




The bottle of the invention may be provided with markings which indicate the volume of fluid therein. In bottle


20


, for example, “milliliter” volume markings are provided on one side (see

FIG. 6

) and “ounce” volume markings are provided on the opposite side (see FIG.


7


).




Baby feeding bottles in accordance with the present invention may be made from a variety of materials including, e.g., glass, and thermoplastic resins such as polypropylene, polystyrene and polycarbonate. Polycarbonate is preferred due to its clarity and durability. Various suitable polycarbonate resins are commercially available from General Electric under the tradename LEXAN.




Nursing bottles according to the present invention can be made most conveniently by extrusion blow molding techniques.




The wall thickness of bottles in accordance with the invention range from about 0.01 inch (0.254 mm) to about 0.04 inch (1.02 mm). The retaining collar, a well-known item for securing a nipple to the open end of a feeding bottle, may be suitably made from polypropylene.




Feeding nipples are also well known in the art; these can be made, e.g., from natural or silicone rubbers or the like materials.




Those skilled in the art will recognize that the teachings of the present invention may be utilized with a variety of nursing bottles. For example, in addition to the embodiments specifically illustrated herein, it is contemplated that the present invention may be embodied in inter alia baby bottles having curved shapes like that shown in U.S. Pat. No. 4,832,213; in baby bottles having a generally toroidal hollow chamber like that shown in U.S. Pat. No. 4,867,325; in bottles of the type disclosed in U.S. Pat. No. 4,813,556; and in the nursing bottle illustrated in U.S. Pat. No. Des. 316,754.

















TABLE 2














Maximum








Maximum




Deliverable




Undeliverable




Volume








Volume,




Volume,




Volume,




Delivered,






Classification




Brand




Ounces




Ounces




Ounces




(%)




























Cylindrical




Evenflo




9.80




5.14




4.66




52%






Straight




Gerber




10.73




5.14




5.59




48%






Grippable




Ansa




10.08




4.67




5.41




46%






Straight






Cylindrical




Cherubs Comfortflow




10.11




7.72




2.39




76%






Angled




Control




9.81




7.21




2.60




74%






Non-cylindrical




Betta Baby Bottle




8.76




8.10




0.66




93%






angled




Evenflo Angled Nurser




9.90




9.41




0.49




95%






Inventive




Gerber NUK Angled Nurser




8.68




7.10




1.58




82%






Bottle




Bottle of

FIGS. 1-12





10.24




8.71




1.53




85%











NOTES:










Maximum Volume = volume in ounces, held by bottle in free standing position










Deliverable Volume = Maximum Volume-Undeliverable Volume










Undeliverable Volume = volume in ounces, which cannot be delivered from bottle when nipple is positioned horizontally










Maximum Volume Delivered, % = Deliverable Volume divided by Maximum Volume × 100












Claims
  • 1. An infant's feeding bottle comprising a body portion having a closed end, a head portion having an open end, and a neck portion joining said head portion to said body portion, said neck portion having a cross-section, said cross section having a shape comprised of a central region having a width and a pair of transverse end regions, each of said transverse end regions having a width that is greater than the central region width, said central region comprised of two continuous arcuate lateral sides, said bottle comprising a front surface, a back surface, a first left side surface and a second side surface, said front and back surfaces being joined to each other by said first and second side surfaces, said front surface comprising a first depression and said rear surface comprising a second depression, wherein said first and second depressions are displaced longitudinally with respect to each other to form said shape.
  • 2. An infant's feeding bottle comprising:a body portion having a closed end, a head portion having an open end, and a neck portion joining said head portion to said body portion, said body portion having a longitudinally extending axis and said head portion having a longitudinally extending axis, said axes intersecting to define an angle, said bottle including a first plane passing through the longitudinally extending axis of said body portion and the longitudinally extending axis of said head portion, said bottle including a second plane passing through said longitudinally extending axis of said body portion and forming an angle of 90° with said first plane, said bottle including a first depression on one side of said second plane and a second depression on the side of said second plane opposite said one side, wherein said first and second depressions are displaced longitudinally with respect to each other.
  • 3. An infant's feeding bottle according to claim 2 wherein said first depression is adapted to receive one or more of an infant's fingers during use.
  • 4. An infant's feeding bottle according to claim 2 wherein said second depression is adapted to receive one or both of an infant's thumbs during use.
  • 5. An infant's feeding bottle according to claim 2 wherein said bottle has an open end and a closed end, said first depression is located between said open end and said closed end, and said second depression is closer to said open end than is said first depression.
  • 6. An infant's feeding bottle according to claim 2 wherein said first plane divides said first depression into a first portion and a second portion.
  • 7. An infant's feeding bottle according to claim 6 wherein said first portion is a mirror image of said second portion.
  • 8. An infant's feeding bottle according to claim 2 wherein said first plane divides said second depression into a first portion and a second portion.
  • 9. An infant's feeding bottle according to claim 8 wherein said first portion is a mirror image of said second portion.
  • 10. An infant's feeding bottle comprising a body portion having a closed end, a head portion having an open end, and a neck portion joining said head portion to said body portion, said bottle comprising a front surface, a back surface, a first left side surface and a second side surface, said front and back surfaces being joined to each other by said first and second side surfaces, said front surface comprising a first depression and said rear surface comprising a second depression, said first depression and said second depression are displaced longitudinally with respect to each other.
  • 11. An infant's feeding bottle according to claim 10 wherein said first depression is adapted to receive one or more of an infant's fingers during use.
  • 12. An infant's feeding bottle according to claim 10 wherein said second depression is adapted to receive one or both of an infant's thumbs during use.
  • 13. An infant's feeding bottle according to claim 10 wherein said bottle has an open end and a closed end, said first depression is located between said open end and said closed end, and said second depression is closer to said open end than is said first depression.
  • 14. An infant's feeding bottle according to claim 10 wherein said first plane divides said first depression into a first portion and a second portion.
  • 15. An infant's feeding bottle according to claim 14 wherein said first portion is a mirror image of said second portion.
  • 16. An infant's feeding bottle according to claim 10 wherein said first plane divides said second depression into a first portion and a second portion.
  • 17. An infant's feeding bottle according to claim 16 wherein said first portion is a mirror image of said second portion.
  • 18. An infant's feeding bottle comprising:a body portion having a closed end; a permanently fixed head portion having an open end, a longitudinally extending axis through said bottle, and a neck portion joining said head portion to said body portion and having a cross-section, said closed end having a thickness of about 0.01 inches to about 0.04 inches, said cross section having a shape comprised of a central region having a width and a pair of transverse end regions, each of said transverse end regions having a width that is greater than the central region width, said central region comprised of two continuous arcuate lateral sides that begin at a first transverse end region and terminate at a second transverse end region, said bottle including a first plane passing through the longitudinally extending axis of said bottle, said bottle including a second plane passing through said longitudinally extending axis of said bottle and forming an angle of 90° with said first plane, said second plane dividing said bottle into a front surface and a back surface, said bottle comprising a first left side surface and a second side surface, said front and back surfaces being joined to each other by said first and second side surfaces, said front surface comprising a first depression and said rear surface comprising a second depression, said first depression and said second depression are located at said neck portion and are displaced longitudinally with respect to each other.
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Number Date Country
197802 Feb 1978 CH
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2 255 913A Nov 1992 GB
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