US2333019A

US2333019A - Pulsator for milking apparatus

Info

Publication number: US2333019A
Authority: US
Inventors: Robert W Lemm
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-06-02
Filing date: 1939-06-02
Publication date: 1943-10-26
Anticipated expiration: 1960-10-26

Description

Oct. 26, 1943. R. w. LEMM PULSATOR FOR MILKING APPARATUS Filed June 2,- 1939 IN VENTOR W. EA/M. fai/WMM ,6065er BY v ATTORNEY.

Y tering the fine passages.

It is an object of my TAFigi 4 isa 'section on UN'ITED( -STATES `wirENT rULsA'roR FORMILKING'APPARATUS RobertW. Lemm, Grass LakefMich. applicati .time 2, 1939, seriaiNo. 276,943

3 Claims. (Cl. 31-61) l v"inventirlnn' relates `toA pulsators Vfor milking apparatus# In a form` of pulsator now quite generally used there area rectangular metal block, or base, and

`two `pairs of `cylinder blocks 1secured to opposite sides of said'y metal blockgwith intervening gaskets, and passages 'passing longitudinally `and transversely inI three directions, into `and, through vsaid `metal block and communicating with the cylinders of said cylinder blocksthrloughv grooves "formed in the side surfacesand` covered with said"V gaskets, Iand passagesin the cylinder blocks.

These passages operi throughtheupper sur- ,facefiof saidinterrnediate block and there ,are

valves ,lthat'r are `automatically actuated to slide transversely onthe'upper surface 'of said intermediate block and cooperate with the openings "in 4said surface to put the vacuum, or atmospheric pressure, inV communication with the usual rubber infiations of the teat-.cups of the milking ap- ,paratus to secure the operation. This conven `tional Aconstruction involves leng and intricate passages of small crosssection, that are difficult Cand erpensive. tomake, that are liable to' clog fup, `andthat vare diflicult toclean. Moreover, i "when `such construction is. taken apart for cleaning, it is often difficult for a mechanically `unskilled person to get it" together again in opera-7.

Y,tive condition. i

In the conventionalconstruction, the length and`intricacy the passages causes'dilatory ac- Htion, and often a stoppage ofthe operation of the apparatus by reason of foreign matter eninvention to eliminate falligfroovesv from` the side surfaces of the block Fig. 1 isfa plan view,` partlyrbroken away, of a `pulsator embodying my invention;

` Fig".` Z'i'gan end elevation, partly brokenaway,

looking from the `position'indicated by the line section on the broken section line thevalve being shown in fullsecthe une 4 4, Fig. 1;

Fig5 is a front elevation.l oi the apparatus shownin Fig.1; l;

Fig. 6...is a view from below ofthe valve shown the drawing, I provide a rec- .strgmni andlrrovidef cylinder Meeks 3 and, `@L ,1

V Figrfl is a View from below of the valve shown at the right of Fig. 1. e,

AReferring 110W i0 tangularbaseblock 2 forming the base` of the inattaching them toopposite vertical sides `of the block 2 by` flanges :l: and screws y, as indicated in Figures 2, 3 and 5. Eachcylinder blockis'pro- `vided with a pair of cylinders having theirinner ends open and ,their outer eridsclosed, the cylinder'block 3 having the cylinders 3a` and `3b and the cylinder block 4 having" the cylinders 4a andlb. 4. i

In the cylinder block 3 I provide `two ystraight passages 3c and 3d, the passage 3c opening to -the outer end of the cylinder 3a and to the inner surface of the cylinder,v block `3` at thepoint 3e 'and the passage 3d opening tothe outer end of the cylinder 3b and` to theinner surface ofthe 4cylinder block 3 at the `point 3f, saidvpas'sage's being preferably arranged in such a manner `that theirhorizontal projections cross each other las lindicated in'Figure l. The cylinderblock 4` is provided'with passages `llc and 4d entirely similar to the passages 3c anddQthepassage 4c 4opening to the outer end of the cylinder 4a and to theinner surface of the ,cylinder block4 at the point 4e and the passagejd opening to the outer end of the cylinder 4b and to the innersurface offthe cylinder block 4 atthe point 4f. i

@From the center ofthe lower surface of the base 2, I bore a cavity 5. When the pulsator is in operative position the blo'ck2 is placed ony the cover Vliof the milk receptacle inl such manner as to register with the suction opening thereof,

not shown,` which is usually provided' insuch covers sothat suction in the cavity tends to cause a vacuum in the milk receptacle; In the Vbase2 there is also provided anaxial" bore 'l extending part way therethrough communicating with the cavity 5 and extending therebeyond yfor a purpose to bev hereafter shown,i and opening, at one end of said base. Atube 8 is 'screw threadedly `or otherwise secured to thebase 2 whereby to conneet with the bore 'l and the cavity ,5 so'that a vacuum producing apparatus may besecured to the` opposite end of the tube 3 to cause vacuum to be produced inthe cavity 5 and in the bore 1.

l In .the base 2, I alsoprovide two vertical passages S and 3a, each opening in the upper surface of the base and' leading to the bore l, said `passages being at right angles to the said bore (Fig. 4) The said passages!! and Sci-are located in the longitudinal centralline of the said surface and spacedV a short distance apart inthe right hand end ofthe base 2 as shown in Figure 1.`

i The base2 has a diagonal passage I@ opening toward the upper surface thereof at'a vpoint`lo cated in the front of thepassage 9a` and extending in downward direction toward the end of the basel opposite to the end to which the tube 8 is connected. The lower end of the passage l0 terminates in a .screw thread opening 10b in said 4base and la metal tube luc is screwed thereinto. i??? .FPCfIYWWPF fcfmectel f' fiysiltale distance apart manifold, such as the manifold I I, which may be provided with am7 suitable tubes, such as metal tubes I Ia, and they are adapted to communicate with the teat-cup iniiations (not'shown).

, The base 2 has an-opening JvI2 .on the upperv surface Lthereof and this opening isllocated in front of the passage 9 and is spaced from the passage I .the same distance as passage Quislf spaced from the passage .9a. Extending in downward and forward directionfroin the open;

ing I2 is the sloping passage I2a, :whichlJhas its `-"j upper end at the opening I2 .and-its lower endV at the opening I2b in the front Vface of the'base 2, which registers with the opening detoifthe'jr sloping passage'dc ofthe cylinder block. "Thebase 2 "has 'another 'openingla on `the upper surface vthereof and located A'equidistantly '"froirrthe. axis` of vthefpassage 'Iwith 'the"pa ssage I2, Extendingin downward and rearward *direction from'theopeningIIla'is the sloping'passage i I 0b which has its upper :endY at the opening "IDa" and; `its lower `end at theppening' I'c i in` the Y rear face of the base 2,and .which registers with thef'open'ingjSe of the 'slopingl passage cofthe cylinder block 3. i y

At Y the left handl ,jend'rof Tf the upper surface Aof ikthe base 2, a verticalpassage* I3'is' bored a-tfright angles to' thev bore 'I-'inisuch `n fianrier `as to; com- :'rnuriicatewith said bore l, ass'hown in "Figure 4 at/equaljdistanceslaterally 'ofthe opening of "said passage' I3A in/"thev surface jofthejbase `2 and e'quaily spaced inwardly fromsaid opening vare f "the openingsjll! "and I5. Extending in downward 'and 'rearward direction from the vhopening I4 is 'thestraight sloping passage "I'ltawhichiA has 'its upper end at the opening'l I4' and its'flower end at ving passage 3d ofthe cylinderb'lock" 3; 'Extending in downward andforward "direction 'from' the opening" I5 is the` straight' sloping passage I5a, 'which vhas :its upper end zat the opening` I5 and "tslower en d at the opening v|51) in the frontface ofythe' base"2,j which registers 'with the `opening passage 4d "of j the `cylinder blocl4,

"The Vcylinders BajandJ 4a areaxiallyin line and areprovided with' pistons,1'I 6 and4V `I 6a respectively, `which are' joined'togethervv by a rodA `I Sbjat a equal tothatiof' 'the remote. ends "of saidcylinders. The cyliridersb and 4b are f similarly 're1ativ`ely`located and have" pistons I 8a and 13b respectively;"w1iich varesirnilarly united 'byarcdIL Y f' For 'operatively and alternately connecting'the 'openings' lila an'dIZ with'theatmosphere and with the suction passage 9` Whereby'to causefreciproc'ation of the pistons IIP and'I 6a, and; for

alternately' connecting thej passagef'l with "the s ysuction passage;4 9a Aand" withr the atmosphere,

whereby to causev pulsations of the: teat-cupinlations (not shown) "I 'provide "valve'l9,1'the lowerjfacepf vwhichs shown in Figure 7. This vvalve' is :adapted Yto, reciprocate laterally upon the "right 'fhand 'iportion ofthe aV reciprocating upper surface 'of' the base 2;'being 'actuated by 'the rod IIB winch extends thereoverand Vwhich is provided with downwardly projecting lugs iISa 'shifts from onefextreme position'to the' other extreme position, and the groove a being adapted to connect the passage IIJ with the suction passage 9a when the valve is in the position shown in Figure 1 and to uncover said passage 5 Ill to'open it tothe atmosphere when'the valve shifts to its other position.

For operatively and alternately connecting the openings I4 and I5 with the suction passage I3 -andwiththe atmosphere, I provide a valve 2I, `'the' lower Aface of which is shown in Figure 6. This valvelisialso adapted to reciprocate laterally uponthe left hand portion of the upper surface of the base'2, being actuated by the rod ISb .whichextends thereover and which is provided with downwardlyprojecting lugs ISc (Fig. 3) ywhich engage 'against the `ends of the valvev 2 I. The valve 2| is provided with divergent grooves ,221'and 22a inthe' lower surface thereof,-solo jcatedfthat one of said grooves shall coverthe opening v It and the 'opening of the passage I3l 'on the surface of the base 2, at one `end ofthe niovem'entofsaid valve, as shown in-Figure `Vl, and the other of said grooves shall vcover'the opening Id and thepopening of thesaidpassage I3 atthe other-'en'dof the-movement of Asaid valve. "The Valveis alsoprovided with an `aperture "23 located equidistantlyv between the 'outer divergent portionsof the grooves soa's torregister withthe opening I4 at one'endof'the movement of 'said 'Valveand with the'opening jI5jj`at rthe other end'of theme-vement ofysaid valve. 'The operationof the-,above `described device is'asfollows: y Assume in the first place,that the vpartsfare inI thejpositions indicated inFigure '1. Theitube' is connectedto produce avacuurn in the bore'l and cavity` 5, and'thetubes jI Ia. v'of the manifold' i I are connected withl theteatcup inflations of' the milking apparatusin Vthe usual manner. AThe lmanifold I'I l is connected*4 to Ythe boreI through thek pipe vIi)c,'the passage'I,

g1oove` '2.a,.'and passage, 9a.

The outer end of the cylinderfla visconnected through the passages 4c, I2a, groove"20,`pas sage Sto the bore'l,"thus 'producing a vacuuminsaid cylinder.` nAl; the Sametime, theiopening "Illa being uncovered, 'atmospheric pressure is admitted to' the outer endof the cylindertla, through thel passages Ib and 3c,'whi'ch' drives theA pistons and Ia tothe forward position, as shown in said figure', carrying the valve 2l with themby means cifthe lugs' Ic, ,and bringingthegroove 22 over the opening ofpas'sage I3 and the opening i4, thus4 connecting the"`outerA end of the cylinder 3b lwith v-the vacuum in the .bore .7, through 'the passages 3d, Illa, opening I4, groove 22 and passage I3. At the same timethe aperture 23 in the valveZIfreg'isters with the. opening I5, admitting atmosphericjpressure to .the outer end of the cylindero,r through the' P21S- 'sa'ges'la audaci, driving the lpistons I8a an d .isb to. the other, endviof theirtstroke ,Thissetion'carriesthe valve I9 withthem byumeansof a lug ld, thus uncovering passage I0 andthe opening I2, and admittingiatinospheric .pressure to the teat-cupfinflations:V through theopening I0, pipe Ic, manifold II and pipes Ilaflandalso admitting atmospheric :pressure .tothefouter end of the cylinder fia, throughl thebpassages ,IZafand f 4c',- and 1 at vvthe :same timefconnec'tingV the passage with the opening I 5a through-the'groove 20fand putting' the outer'v end" of 'the lcylinder l3a linto .connectionY lwith the vacuumpasage "'I; through f the passages 3c, i I 0b; groove- 2`i-Ik andwv passageJA 9.

The above cycle is automatically repeated causing the operation of the milking machine.

It will be observed that all the passages are straight and short, and that an alternative positioning of the parts will do no harm, as they are symmetrical.

While I have defined as Well as I could my invention in the following claims, it is obvious that alterations including my invention could be made and I wish my claims to cover such alterations. For instance, the passages in the base may be crossed instead of the passages in the cylinder blocks.

I claim:

1. A pulsator for milking apparatus comprising, a base having a horizontal upper surface and two oppositely disposed side surfaces, two cylinder blocks each having two cylinders spaced from each other and bored therein from one vertical side surface, means securing said cylinder blocks to said oppositely disposed side surfaces with the bored surfaces adjacent thereto and the cylinders in oppositely disposed pairs, a piston in each cylinder, rods joining together in spaced pairs the pistons in the oppositely disposed pairs of cylinders, said rods passing over the horizontal upper surface of the base, a straight passage passing inclined through each block and opening at one end to one of said cylinders and at the other end through said bored side surface, a second straight passage passing inclined through each block and opening at one end to each other cylinder in the block and at the other end through said bored side surface, a pair of straight passages in said base opening through the upper surface adjacent one of the piston rods and extending inclined through the base and opening at the other ends through the side surfaces at positions to register with said passages in the blocks leading from the remote pair of cylinders, a second pair of straight passages in said base opening through the upper surface adjacent the other one of the piston rods and extending inclined through the base and opening through the side surfaces at positions to register with the passages in the blocks which lead from the other pair of cylinders, a vacuum passage in said base, apertures extending upwardly from said passage through the upper surface of said base adjacent the two piston rods, a valve operatively connected with each piston rod and adapted to slide upon the upper surface of said base, each valve having suitable open portions suitably positioned to connect the vacuum passage and atmosphere alternately to selected ones of the pairs of cylinders so that each pair of pistons controls the connection of vacuum to the other pair of pistons and the pistons reciprocate as long as the vacuum passage is connected to a suitable source, a teat cup connection in said base opening through the upper surface adjacent one of the piston rods, and connection means controlled by the adjacent valve for connecting vacuum to said teat cup connection each time the valve is moved to one extreme position by the piston rod.

2. A pulsator for milking apparatus comprising, a base having a horizonta1 upper surface and two oppositely disposed vertical side surfaces, two cylinder blocks each having two cylinders spaced from each other and bored therein from one vertical side surface, means securing said cylinder blocks to said oppositely disposed side surfaces with the bored surfaces adjacentthereto and the cylinders in oppositely disposed pairs, a piston in each cylinder, piston rods joining together in spaced pairs the pistons in the oppositely disposed pairs of cylinders, said rods passing over the horizontal upper surface of the base, a straight passage passing inclined through each block and opening at one end to one of said cylinders and at `the other end through said bored side surface, a second straight passage passing inclined through each block and opening at one end to each other cylinder in the block and at the other end through said bored side surface, said passages crossing each other, a pair of straight passages in said base opening through the upper surface adjacent one of the piston rods and extending inclined through the base and opening at the other ends through the side surfaces at positions to register with said passages in the blocks leading from the remote pair of cylinders, a second pair of straight pasages in said base opening through the upper surface adjacent the other one of the piston rods and extending inclined through the base and opening through the side surfaces at positions to register with the passages in the blocks which lead from the other pair of cylinders, a vacuum passage centrally disposed in said base, apertures extending upwardly from said passage through the upper surface of said base adjacent the two piston rods, a valve operatively connected with each piston rod and adapted to slide upon the upper surface of said base, each valve having suitable open portions and being suitably positioned to connect the Vacuum passage and atmosphere alternately to selected ones of the pairs of cylinders so that each pair of pistons controls the connection of vacuum to the other pair of pistons and the pistons reciprocate as long as the Vacuum passage is connected to -a suitable source, a teat cup connection in said base opening through the upper surface adjacent one of the piston rods, and connection means controlled by the adjacent valve for connecting Vacuum to said teat cup connection each time the valve is moved to one extreme position by the piston rod.

3. In a pulsator for milking apparatus of the type having a central block with associated cylinder blocks upon opposite sides thereof having their faces in abutted relation, a pair of cylinder bores in each cylinder block aligned with corresponding bores of the other, interconnecting pistons in said aligned bores, and valve plates actuated by the pistons: ports defined in one face of said central block and regulated by said valve plates, ports defined in the walls of the bores in said cylinder blocks, and straight passages extending from said ports defined in said central and cylinder blocks and terminating in aligned ports in the abutting faces of said central and cylinder blocks, a diiferent pair of said straight passages defined in said central block communieating with a pair of said straight passages in each of said cylinder blocks, said intercommunicating passages of both of said central and said cylinder blocks extending through said abutting faces at acute angles.

ROBERT W. LEMM.