US 1618339 A
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Feb. 22,1927. 3,618,339
A. E. HOLMES LIQUI-D DISPENSER Filed March 16, 1926 [xv VE/V TOR A1. FRED H01. MES
Ammp E. HOLMES, or CHICAGO, zpLn o'zs, AssIeNoRTo WILLIAM H. PLUNKETT, or
Y CHICAG9, ILLINOIS.-
LIQUID DI$PENSE3- Application filefi March 16, 1!?26 Serial No. 35 037.
My invention relates to liquid dispensers and is designed pii'inarily fontne dispensing ofliquitlso'ap in'l'avatoiies. Qne objectof the invention istoprovicle a dispenser in which the piun gei' is arranged horizontally and the deiiviy spout vertically 'soah'at when the"opeia'tor imparts a straight in push to the plunger and" "their releases it a niea'sui ecl "'[quantijty'"of the liquid Will be ejected""tlowviiiv'afcl out ofthe spout. An other objectisto' provide 'adevice of this class which issi'mple'fto"niake'ancl feliable in its ope ation; and which Pi'QVIlt the use? 'frohfobtaining" an 'eic ve' amount of rapidly pumping t e plan-gel back i i ictfofihf "one afuie s ecific objectsflof the intention is?" to previd a'cuspei sei-"h v iiig' fi e-angle; perm-ff bypass; 'Po' it located Tthe t6p of the 'pliinge f' 'ancl"flieans'ffof holdingitin'fthisposition? "I accomplish iny'obj'efcfts by the mechanism e'd "iii" the accompanyin drawings fi i h e Figufe 1 is a side vievv of a dispensing cle vice sho the supply c luct' in eemi alfver tiCal s etiOn: i ii igures 2 and 3 are elevations taken chieflyinee nti'al v eiftical' sectionahcl showingphe plunger in changed positi'onsl" "Figfire is perspeetive view or the p mg v i i I "Figure 5 is a transverse sectional View on'the line 5 5Fi'g1 1i'e 2. "Eigufe 6 is a"se ctio nal view on the line 66? igure 2. Lili'enuinerals denote like pai'tsthrough out-fthlesevei al views; v In'practice'theliquid is supplied through a su ply duct '10 which 'lez-iclsifi'oin a"resei' VOll o fany suitable type, usually of glass. Such fserizoiifihre known, being shown, for example, in prior Pate1 1ts"1,165,673 and 'IAS EQSAL, andtofisequ nuy need not be li ereshowfioi (le'scfibeclz ""Tn *theTcl'esig 'llustratecl a casing '12 screws 'injto' the 'outeifen d of the supply'fcluct and staiitls fahorizontal position; At the oiit ei encl of the ca ing there a spout sec tion l fivhich is"inte;in'a1ly 'threaclel' and screws upon an e'xtefnal-ly threacleicl portion the plunger against rotation about a horizonta l axis in, the Whi e-h ivill' fb'e hereinafter explained? The liquid ('16: liverecl thi'ou h a spout atth bottoin of ls l i i v t .u r
Sci ewin'g i to the inner enc l of the casing is a nipple 22 Whichhasan intefnalsholil 2 L serving as an zibut neiit' for ehca pressio'n spring" 26'; "lh is spriiig' sn'iroun cls the "ste n 2 8 "of the" plu iig'ef 50 "and ab itstlie p ne $6 t p iip 6 fire ine' it 0 t.- Ward to the moi-11m? p6 iti on hbv 'n Ward por ionof the stem isalso cut on liquid to oven I, Will beno at all."
1 prevented "from rotating fsec'tibn Mflvhicli has the sam erp sse eo mime pieseiiflce'se ap roximatel fiflai'i laras the cross 'sectio'n of'thsteniftt'? point.
"'It is desirable to place abutton or hand there onvenience of'dp'e n.
In pi a h upply uct 10 v F T e T being accomplished by the supply reservoir, not shown. Normally the plunger will occupythe projected position shown in Fig ures l and 2. Under this condition the liquid will pass by the inlet ports 34 into the chamber within the casing. At the same time the plunger 30 which is seated against the shoulder 32 will retain the liquid within the chamber. If, now, the operator wishes to obtain liquid he presses inward upon the button 40 and moves the plunger towards the position shown in Figure 3. This has the efiect of first closing the inlet ports at and then opening the outlet ports 36. Practically speaking, the amount of liquid delivered will be the amount displaced by'the plunger after the inlet ports 8% have been closed. The amount displaced will flow over the top of the plunger to a position in front of it and when the plunger is released it will move outward and eject the quantity of liquid that has thus flowed over it. As the entire sides and bottom portion of the plunger'make contact with the inner walls of the casing there will be no back flow, practically speaking, for only such liquid can flow back as would be above the level of the cut portion of the plunger. Under ordinary circumstances where the user operates the device reasonably slowly this would be negligible. As soon as the stem 28 moves outward far enough to cover the ports 36 the forward flow is checked. Soon thereafter the ports 34: are uncovered whereupon a fresh charge of liquid will be drawn in. However, if the user becomes impatient and starts to pump the plunger backand forth rapidly, he will not obtain much more liquid than he would by a more deliberate operation because the spaces around the forward stem at the ports 36 are more or less constricted and the resistance to flow at this point would cause a portion of the liquid to flow back over the top of the plunger. The quick motion back and forth would not permit the space in front of the plunger to refill to any great extent, and the result would be that the liquid would swash back and forth past the plunger and not deliver a full measure of liquid on each forward reciprocation. Therefore the device automatically puts a premium on deliberate and normal operation and if the device is operated in this way the user will obtain the allotted amount of liquid and he will not obtain much more than this if he misuses the device by attempting rapidly to pump the liquid from it.
From the foregoing it will be seen that the construction is simple and that the device is effective in operation. As the spout section 1A locks against the shoulder 18 it holds the spout in a truly vertical position,
and the locking of the spout section also locks the stem against rotation about its axis, thus always holding the dam or cut portion of the plunger uppermost and horizontal.
Having thus described my invention What I claim as new and desire to secure by Letters Patent is:
1. A liquid dispenser having a casing arranged horizontally, a plunger slidable within the casing, and a stem extending inwardly and one extending outwardly from the plunger for operating it, said stems having ports in the side so located that the ports on one side of the piston will close before the ones on the other side open the port area about the inwardly extending end of the plunger being smaller than the effective area of the plunger, the plunger being cut away at the upper portion only whereby no liquid will be passed except that which flows over the said upper portion of the plunger.
2. A liquid dispenser having a casing arranged horizontally and provided with a chamber having a center bore at each end, a plunger fitting slidingly within the chamher and cut away at the top only for passing the liquid, the plunger having stems of reduced diameter extending into the bores, the stems having ports at the sides alternately covered and uncovered as the plunger is reciprocated, and means for pre venting the plunger from rotating about its axis whereby the cut-away portion always remains uppermost andthe plunger fits the walls of the chamber at all other portions.
3. A liquid dispenser having a casing arranged horizontally with center bores at the front and rear, the inner walls of the casing being cylindrical, a plunger slidable within the casing in a horizontal direction, stems at the front and rear of the plunger, making a sliding fit with the center bores, said stems having ports in their side, the port area of the forward stem being less than the effective area of the plunger, one set of ports being covered before the other set is uncovered, the plunger fitting the inner walls of the casing and being cut away at the top only to form a passage for the liquid, and means for preventing the rotation of the plunger about its axis.
4:. A liquid dispenser having a casing ar ranged horizontally with center bores at the front and rear, the inner walls of the casing being cylindrical, a plunger slidable within the casing in a horizontal direction, stems at the front and rear of the plunger making a sliding fit with the center bores, said stems having ports in their side, the port area of the forward stem being less than the effective area of the plunger, one set of ports being covered before the other set is uncovered, the plunger fitting the inner walls of the casing and being cut away at the top only to form a passage for the liquid, a portion of the forward stem being polyangular in cross section, and means secured to the forward end of the casing and making a sliding fit with the polyangular portion of the stem for preventing the lat ter and the plunger from rotating about their axis.
5. A liquid dispenser having a casing with cylindrical inner walls and center bores of reduced diameter at the front andback end, va plunger sliding within the cylindrical portion of the casing and having a segment cut away at the top only to form a passage for the liquid, stems integral with 1 the plunger and extending forward and backward to fit slidingly within the center bores, the stems having ports in the side,
the' port area of the forward stem being smaller than'the effective area of the plunger, one set of ports being covered before the other set is uncovered when the piston is reciprooated, a spout section screwing onto the forward end of the casing, means for locking the spout section in such position that the spout extends vertically downward, the forward portion of the spout section having the same cross section as the forward portion of the forward stem for preventing the latter and the plunger from rotating about their axes.
In witness whereof, I have hereunto subscribed my name.
ALFRED E. HOLMES.