Breast pump

Breast pump

Oct. 4 , 1927. ‘ 1,644,257 E. LASKER BREAST PUMP Filed Aug. 2, 1923 ’ 1,644,257 Patented Oct. 4, 1927. ' PATENT 0FFICE.~ ; UNITED JSTATES EDW...

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Oct. 4 , 1927.

‘ 1,644,257

E. LASKER BREAST PUMP

Filed Aug. 2, 1923

’ 1,644,257

Patented Oct. 4, 1927. '

PATENT 0FFICE.~ ;

UNITED JSTATES

EDWARD LASKER, OF CHICAGO, ILLINOIS.

BREAST rumr. Application ?led August 2, 1928. Serial No. 655,245.

My invention relates to a_ breast pump for to the exact structure ‘of the milk receiver which may be modi?ed as to form.

use, for examplerin maternity hospitals‘, and

.

Fixed 1n the other hollow udgeon 15 is an

the object of the invention is to provide a

?tting 132 formed wit a artition 33 ‘simple, effective, sanitary apparatus WhlCh elbow operates automatically, imitatin in its effect having a small ori?ce 34 theret rough and

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a suckin infant, and can berea ily adjusted beyond the partition is a coiled spring 35 hearing on a ball valve.36 seating over an to give the desired degree of vacuum. ori?ce 37in the end of a bonnet 38 which is The invention is illustrated in the accom panying drawing in which

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. threaded on the end of ?tting v32 for the 65

Fig. 1 is 3V side elevationof the apparatus, purpose of adjusting the pressure of the ' spring on the valve. and _ Preferably a vacuum gauge 39 is arranged of the Fig. 2 is a view, partly. in section,

suction pump and milk receiver, _

on the head of the pump cylinder to indi

Referring to the drawing, 10 designates a cate the’ vacuum developed in the apparatus 70 by the pump. The pump cylinder 17 is base on which the apparatus'is'preferably clamped between the head 16 and a lower mounted. 11 is an electric motor and 12 a

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casing containing a reduction gearing of any , open head on ring 40 by means of bolts 41. suitable construction. Supported on the eas The pump structure may be readily disas 75 ing are a pair of upright‘ spaced supports sembled, as will be seen, and the parts cleaned necessary. 13 having bearings at the top for gudgeons when . The operation of the apparatus is as fol 14;, 15 formed on the head 16 of a pump cyl~, inder 17 which is thus pivot-ally supported on lows: The pump at its down strokes creates,

suction impulses which are transmitted to the gear casing 12. The cylinder 17 con the breast through tube 24 and the vacuum tains a piston 18 having a rod 19 connected The intensity of these impulses by a pitman 20 to a wrist pin 203 eccentri—

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' chamber.

cally arranged on a disc 21 on the outside .1 may be-varied while the machine is in op

by turning the bonnet 38 so as to of casing 12, the shaft 22 of which disc is eration, adjust the compression of spring 35. In rotated at a relatively slow speed by motor

the valve is set at ?rst to‘produce 11 through reducing gearing (not shown) practice av very low vacuum, say one or two inches

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of any suitable type in casing 12. The of mercury, inorder to avoid shock to the ' 15 are tubular and communi-‘ cate with the interior of the pump cylinder , patient likely to cause inhibition of milk and into the gudgeon 14 is ?tted a nipple flow. The vacuum is then gradually in—

gudgeons 14,

23 for a ?exible tube 241, the other end of creased to a maximum'of from ?ve to nine which is attached to a nipple 25 on a prefer inches, the normal suck of healthy infants.

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The number of such strokes per mmute may ably globular vacuum chamber 26. The be varied by changing the speed of the motol chamber 26 is provided with a ?aring mouth _ through a suitable rheostat indicated diar piece or breast appliance 27 to ?t over the grammatically 42. Ordinarily the suc breast. The mouth piece has a tubular ex tion impulses toat imitate sucking of an tension 28 projecting preferably within vthe infant will vary from 40 the to 80 per minute. chamber to a point below the .air'exit nipple The milk is drawn through the mouth piece 25. From the bottom of the vacuum‘ cham 27 which has an air-tight ?t around the ber projects a milk outlet nipple 29 on which breast and into the chamber 26 below the is arranged a tapered valve tube 30 of ?ex_ air exit nipple 25, so that no milk will enter

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ible material such as rubber, the lower end of

the air line, the milk passing downwardly _ ' Preferably the vacuum chamber and its into’ the valve tube 30. The capacity of the

which is slit at 31.

cylinder 17 isv considerably greater mouth piece and nipples are made ,of glass, pump than would be required simply to provide the mouth piece being fused into the cham the desired suction on the breast, and the ber so as to form therewith a single integral valve 36 will be so adjusted that a certain structure which obviously may be very easily amount of air is drawn into the cylinder on cleaned and sterilized. The valve tube may the suction strokeof piston 18. On the re be removed and cleaned, and also tube 24, turn stroke of the piston, the ball valve 36 when necessary, so that all parts subject to will close, and this air must be expelled, contamination may be kept in sanitary condi through tube 24 to vacuum chamber 26, thus tion. The invention is not, however, limited

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' 1,644,257

creating - a positive back pressure ‘in the let, a / breast appliance unobstructedly‘ conl

breast appliance, and, together with the nected with the chamber, and means for pro weight of the milk, bringingabout the dis ducing alternate suction and pressure im

charge of the milk through slit 31 into some suitable vessel in which it may be collected. The valve 30 acts not only to discharge the milk (in the embodiment of the invention

pulses in the vacuum chamber and breast appliance comprising a reciprocatin pump h aving one - valveless connection with the valcuum chamber and a separate valved air shown) but as an automatic vent to limit in et.

the amount of back pressure. The breast 2. In a breast pump, the combination of a '10 appliance 27 has a smooth conical inner sur vacuum chamber having a valved milk out

face against which the breast is drawn on the vacuum pulsation preventing undue dis tension and bringing about a compression like the action of an infant’s lips, the breast

let, a breast appliance unobstructedly con nected with the chamber, and means for pro

,ducing alternate suction and pressure im pulses in the vacuum chamber and breast being repelled from the conical surface by appliance comprising a pump cylinder, a the pressure pulsation. The pulsating ac piston in the cylinder, means for recipro

tion has therefore a massaging effect on the cating the piston, a valveless tubular con breast which is often bene?cial. The course nection between the cylinder and the vacuum

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of the milk through the apparatus is short chamber, a separate air inlet to the cylinder, so that the possibility of contamination 1S and a valve in said inlet permitting a re minimized. Between each suction impulse stricted ?ow of air to enter'on the suction there is a period of rest at substantially at~ stroke of the piston. mospheric pressure or at a pressure which 3. In a breast pumping apparatus, the may be increased slightly above atmospheric combination of a breast appliance formed to pressure. It will be understood, however, ?t over the breast, means providing a cham that the invention is not limited to the par ber to receive milk from the breast appli ticular means shown for producing the in ance and mechanism for alternately reduc termittent suction impulses. In fact, the ing the air pressure in the breast appliance invention includes all modi?cations within below and increasing it above atmospheric the scope of the appended claims. pressure in recurrent pulsations. As the pump is operated by a motor the 4:. In a breast pumping apparatus, the suction impulses are uniform, the maximum combination of a breast appliance formed intensity as well as the duration and fre to ?t over ‘the breast, means providing a quency of the suction impulses being- the chamber to receive milk from the breast ap fame, subject, of course, to adjustment for pllance, and mechanism comprising a vac~ different patients. Between each suction im uumand pressure pump and motor for driv pulse there is a period of rest at atmospheric pressure, or slightly above. The breast ap

pliance is connected with the pumpby ?exi

ing the same ‘for alternately reducing‘ the

air pressure in the breast appliance below

and increasing it above atmospheric pressure

ble tubing so that it may be easily held in recurrent pulsations of uniform fre- J against the breast with a slight pressure, quency and intensity. . which is not affected by the pump movement '5. In a breast pumping apparatus, the as would be the case with a hand operated combination of'a breast appliance formed device in which the breast appliance and ex to ?t over the breast, means providing a hauster were rigidly connected. The inter chamber to receive milk from the breast ap- ' mittent, regular and even suction and pres pliance, mechanism comprising a vacuum sure impulses, the latter resulting from back and pressure pump and motor for driving

pressure of air during the periods of dis the same for alternately reducing the air charge of milk from the vacuum chamber, pressure in the breast appliance below and ' have a massaging effect which has been found increasing it above atmospheric pressure in ' very bene?cial in stimulating milk secretion recurrent pulsations of uniform frequency and have even produced milk ?ow from and intensity, and means for varying the breasts considered dry. The machine can be intensity of the vacuum produced. successfully used on patients having inverted 6. In a breast pumping apparatus, the nipples. The machine can be used also on combination of a breast appliance formed engorged breasts, caked breasts and ?ssured to ?t over the breast, means providing a or cracked nipples effectively and without chamber in unobstructed communication pain by reducing the maximum vacuum in with and arranged to receive milk from the tensity from, for example, nine inches of breast appliance, air pumping mechanism 60 mercury, which is the average for normal operating to alternately produce a vacuum cases, to as low as two and one-half inches if and a pressure above atmospheric pressure,

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necessary. I claim:

-

a

p 1. In a breast pump, the combination of a

vacuum chamber having a valved milk out

and a ?exible valveless’ tube for operatively

connecting the breast appliance and cham~ ber with said air pumping mechanism. 7. In a breast pumping apparatus. the

1,044,257 pressure in the breast appliance in recurring ~

combination of a breast appliance formed pulsations which draw the ‘breast against

to ?t over the breast, means providing a and release it from said conical surface,

chamber in unobstructed vcommunication means whereby the patient may. vary the in;

with and arranged to receive milk from the tensity of the vacuum to suit the condition 70

breast appliance, air pumping mechanism of‘ thebreastduring the operation of the comprising a reciprocating vacuum'fand apparatus, and’ a‘?exible tube by means of pressure pump, a motor to- drive the same which the breast ap liance is operativel}

and means for admitting outside air to- the connected with the a- oreSaid mechanism. 12. In a breast pumping apparatus, the 75 um on the vacuum stroke of the pump,‘

End a ?exible tube operatively connecting combination of a rigid breas‘t‘appliance to -

15

the chamber and breast appliance to the ?t 'over the breast having an inner. smooth conical surface, means roviding a chamber pump. 8. In a breast pumping apparatus, the to receive milk from the breast appliance, combination of a rigid breast appliance to mechanism com rising a vacuum and pres

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?t over the breast having an inner smooth sure pump, an a motor for driving the conical surface, means roviding a. chamber same for alternately reducing the air res to receive milk from ‘t e breast appliance, sure in the breast appliance below an in

mechanism for alternately reducing the air creasing it above atmospheric pressure in, pressure in this breast appliance below and recurring pulsations of uniform fre uency increasing it above atmos heric pressure in and intensity, which draw the reast recurring pulsations whic draw the breast against and repel it from said conical sur against ‘and repel it from said conical sur-’ face, a ?exible tube by means of which the face, and a ?exible tube by means of which breast appliance is operatively connected the breast appliance is operatively connected with the aforesaid mechanism,‘ and means

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with the aforesaid mechanism. whereby the vintensity of the vacuum may a 9. In a breast pumping apparatus, the be adjusted. . combination of a rigid breast appliance to 13._-In a breast pumping apparatus, the ?t over the breast having an inner smooth combination of a rigid breast appliance to conical surface, means providing a cham ?t over the breast having an inner smooth 95 30 ber to receive milk from the breast appli» conical surface, means providing a. chamber ance, mechanism for alternately reducing the receive milk from the breast appliance, v air pressure in this breast ap liance below to mechanism comprising a vacuum and pres and increasing it above atmosp eric pressure sure ump, and a motor for driving the same in recurring pulsations which draw the for a ternate‘ly reducing the airpressure in 100 ' breast against and repel it from said conical the breast appliance below and increasing it surface, a ?exible tube by means of which above atmospheric pressure in recurring the breast appliance is operatively connect pulsations of uniform frequency and inten ed withthe aforesaid mechanism, and means sity, which draw the breast ‘against and repel for varying the intensity of the vacuum it from said conical surface, a ?exible tube 105 by means of which the-breast appliance is ~ V40 produced. 10. In a breast pumping apparatus, the operatively connected with the aforesaid combination of a rigid breast appliance to mechanism, means whereby the intensity of ?t over the breast having an inner smooth the?vacuum may be adjusted, and means, conical surface, means providing a chamber providing a vent for excess air during pres 110 to receive milk from the breast appliance, sure pulsations. mechanism for alternately reducing the air 14. In a breast pumping apparatus, the pressure in- this breast appliance below and combination ofa- milk receiver having a, ' increasing it above atmospheric pressurein breast appliance thereon, mechanism com recurring pulsations which draw the. breast prising an air pump and motor for driving 115 the same for exhausting the air’from said 50 against and repel it from said conical sur face, a ?exible tube by means of which the milk receiver and breast appliance in re?

breast appliance is operatively connected curring pulsations of uniform frequency and

with. the aforesaid mechanism, and means intensity, a valve for admitting regulatable providing a vent for excess air during the amounts of air into the apparatus during the ' suction pulsations, and a ?exible tube oper .55 pressure pulsations.

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11. In abreast pumping apparatus, the atively connecting said receiver and breast combination of a' rigid breast appliance appliance with the pump. . formed to ?t over the breast for' a substan

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v15. In a ‘breast pumping apparatus, the

tial distance beyond the nipple and support combination of a milk receiver having a the same against distension, said appliance substantially conical breast appliance there having an inner smooth conical surface, on formed to ?t over the breast for a sub means providing a chamber to‘ receive‘milk stantial distance beyond the nipple and sup from the breast appliance, motor driven port the same against distension, mecha

mechanism for alternately reducing below nism comprising an air pump and motor for atmospheric pressure and increasing the air

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1,044,357 driving the same for exhausting the air from 17. In a breast pumping apparatus, the Said milk receiver and breast appliance in‘ combination of means to ?t over the breast - recurring pulsations vof uniform :fre uency and receive milk drawn ‘therefrom provided and intensit , a ?exible tube operative con with an automatically opened outlet to re receiver and breast app iance duce pressure in said means, and mechanism vwith t e pump, and means on a stationary for alternately evacuating and creating av

nectin

sai

part of the apparatus whereby the patient pressure above atmospheric pressure in the may vary the intensity of the vacuum to suit the condition of the breast while the

aforesaid means.

7

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18. In a breast pumping apparatus, the 10 apparatus is in operation. combination of a breast appliance formed to 16. In a breast pumplng apparatus,.the ?t over the vbreast, pum ing mechanism ,1 combination of a breast appliance formed to with which the'breast appliance is ?exibly ?t over the breast, means providlng a eham'-. connected , for producing intermittent suc ber to receive milk from the breast appli tion im ulses in the breast appliance of sub 35 15 ance, a reciprocating vacuum and pressure stantially uniform intensity‘ with alternate ' pump operativel connected with said breast intervals of pressure above atmospheric appliance and c amber,v and means for ad pressure, means for permitting the escape ,

mitting air in regulatable quantities into the of air from the apparatus during said in tervals of higher pressure to limit such pres above atmosphere is created in the breast sure, and means for varying the intensity of appliance on the alternate

I pump on the vacuum stroke, so that pressure"

pump.

strokes of the ' such‘ suction impulses. '

EDWARD LASKER.

40