US1903332A - Attachment for dispensing and measuring pumps - Google Patents

Description

April 4, 1933. c. J. BELLAR ET AL ATTACHMENT FOR DISPENSING AND MEASURING PUMPS 2 Sheets-Sheet 1 Filed Jan. 14. 1932 INVENTOR mamas J- BELL/ii? c/mmss- R- Y/Rfi v4 WMORNEY April 4, 1933. c J BELLAR AL 1,903,332

ATTACHMENT FOR DISPENSING AND MEASURING PUMPS Filed Jan. 14. 1952 2 Sheets-Sheet 2 7 I s 6 z P 77 5.

TTTTTT EY Patented Apr. 4, 1933 CHARLES JZBELLAR-CHARIJES' RuYIBAVAyOj c'LEv'ELAfNm 310 I airofgas, and/or when the punipjs'fpartly'j" fillecl with'liqu'id and partly with aii',

condition which arises whefi the stofgtgetziiili is a'l-ifi'ost empty or; when its content are iir'w semiliquid state. v

Thegener al object ofthe present inve'ntioii is to provide; a measurifig pump-with Ineai1s""' "for by-passing a charge of oilor grease or a portion thereof backinto the? storage tankuntil the remainder of-the chaigeiefree from air and gas; Fraudulent or accicleiital-die" .pen'siiig of short measure is thereby pre 'vented. The controlling meanfeonsist ofa pressure operated valve mechanism in the? foi'm of an attachment readily eonnectible to any'ordinary grease or oil puinpfinitk This valve mechanism is attached to the top 305 p0rtion -0f the p ump n'eaf'the outlet thereof; and' close to {the inlet of the fluid nrit'erf, all as hereiiiafter'niore fully brought oiit inf the followiiig'desciiption of an exeifip-li'fied-ffofm' ,ofthe' invention shown in the dreiwiiigsj, and" as more concisely-set forth in' the appended Iii thes'e drawings, Fig; 1 isafsetio jali' View pdrtly' in elevatiofl of a, grease p mp unitwitha valve attachmentembodied-there in according to the invention." Fig. '2 is a} tra'iisveise sectional View of the'velve attieh' mentshownin Fig-Q1, {and Fig. 3 a seotional view-"onliiie 3-3 of Fig. 2. FigsAthrough n 6 are-detail views off-he valve me'chenim Thfis-Figz4 is a side "view of the p-lug and needle-valve controlling the bypassing" of the liquid; FigI-5 "a'side' view"of"the*come presion spring of. the valve; and Fig- 6 "a q sectional view of the Valve pi'opei. Fig? 7 is aside'view of' a, grease pump unit having a valve attachmeht;

slightly modifidfforlhi o ff'valvea tthchme coiineptefdlthel eto by me'ztiieof a tubulfijif ber rigidly secured to"thef goos e neck of the downwardly into tank's el'oe' to the bot jm' below the-limit ofth'e stiioke'ofvalved pistol 1 5 to provide clea'ran'e "between 1 the valve I 1 said'attachnieht andsahl pistixi isprovid" f? with a; central aperture" 32'; normally" closed to trenjsferftheliquid we d speieit-g 11622115 5 (notsliown'). I

Di i'ihg p'llinping op er'faiti'fdiis v pistoii 5, unseatsfthebell valve I seat", d'ia-ws' oilorf gr'efae through openiffg 32 on" it upward" stroli and onf-its downwii-rdlstiok into cvl and foice's the charge preee'n n V s der upwardly into and throu through tubing 14 back into tank 3, accordingto the position of a shiftable piston valve ii member17, forming part of valve mecha-.

nism' '-Valve 17 is guided for reciprocatory movement in valve chamber18, which communicates with pump body B, meter L and tubing 14, passages 19, 20, and 21, re-

spectively, being provided, for such purpose,

vale member 26 formed on and pro ect1ng spring is overcome by the pressure of the charge of oil and grease in cylinder4. This spring seats at opposite ends against the inner face of end wall 23 of piston valve 17 and against theinnerend of a plug member 124., End wall 23 is provided with a centrally disposed perforation or opening 25, axialgned with, a fixed cylindrical needle inwardlyflfrom plug member 24. Valve 17 when fin-position for passage '20 abuts against therim .27 of a screen member '27 seated in a recessed portion'28 of passage 19; The down pipe'or tube 14, previously referredto is threadedly connected to and communicates throu'ghpassa'ge 21 .withthe valve chamber 18. The/recess 28 provided in the wall of this'chamber 18 and extending from passage 21 to the ,end of chamber-1'8, thus prevents entireclosing of by-pass passage 21 by valve 17 ,so that saidvalve may readily be shifted when subjected to the pressure of liquid pumped through passage 19, to and through screen 27 f and thence against theend wall 2.3 of valve 17. v

During'the discharging stroke of piston 5, the valve 17 will be shifted by the pressure of the liquid to the position shown in Fig. 3,

provided the liquid'pressure upon the per-. forat'ed wall 23 of valve 17 exceeds the force p of spring 22. In Fig. 3 position the liquid willbe discharged through passage 20 into and, through meter L, and thence through hose16. The tension of spring 22 is such thatsuflicient pressure lto shift valve 17 can .abe built up only after practically all air and 'gas have been expelled from the oil or grease.

Consequently, valve17 will remain'stationary, and the air and gas together with the oilor greasewill be" bypassed through ringshaped passage 29, opening25 and around valve member 26',into valve chamber 18, and thence through passage 21 and tubing 14 into tank 3. Wh-en the air and air andliquid mixturehas been bypassed the. pressure exerted against valve 17 increases immediately and piston valve 17 is shifted-to Fig. 3 position,

. thus permitting dispensing of the liquid through meter L.

In the modified form of our invention illustrated inlFigures 7411', the threaded extension 35, of pressure actuated valve memberof mechanism M, is attached to the goose neck upper end 12 of pump unit or body P, by

means of a tubular connecting member 36;

' This tubular member 36 is threaded at one end to receive the threadedextension-35 and at its other end isformed with a semi-circular extension or clamping portion 37, in turn provided with oppositely disposed apertured ears 38. The goose neck end 12 and the inner curved facei39 of clampin'gpo'rtion 37, just referred to are formed with shoulders or ribs 40 and 41- respectively.

When the member 36 has been threadedly. attached to the threaded extension 35, and the goose neck seated within or uponthe I curved clamping face 39-, shoulder41will engage behind the shoulder-40. A complemental clamping member 421is thenplacedz over the exposed portion of the-goose'neck and clampedthereto and, to the extension 38 by means of bolts 43. The curved inner face;

44 of member 42 is alsoprovided with a rib or shoulder 45whichengages behindtherib or shoulder 40 on the gooseneck. will of course be understood that the ribs 39 and 45 on the respective clamping parts or members 38 and42 are of arcuate shape, whereas the rib or should'er40 on the goose neck is in 'form of a completefcircle or ring The end of the goose neck willseat against an; asbestos or copper ring-shapedwasherorfgasket 46, V.

thus effecting a tight seal between the goose neck and the end of threaded extension35.

lVhat We claim, is: I f j 1. An attachmentfor a liquid dispensing pump, comprising abody,la valve chamber within said body, inlet, outlet, and bypass passages communicating with said valve chamber, a pressure operated piston valve shiftably arranged within said valve chamber 7 controlling said inlet and outlet passage, a

perforation in the end wall of said va'lve and V a needle valve centrally mounted within said chamber and co-operating with said perforaa tion in the end wall of said piston valve for preventing communication of said by-pass passage, and said inlet passage, when said. outlet passage communicates with said inlet 5. v

passage at predetermined pressures therein. I

2. An attachment for a liquid dispensing pump, comprising a body, a valve chamber within said body, inlet, outlet, and bypass passages communicating with said valve chamber, a hollow piston valve within said. chamber controlling said passages and in cludinga perforated end wall, means to close said perforation in said end wall when'said I valve is shifted and yielding means forcibly shifting said valve so that said outlet passage is closed and said perforation in said end wall and said by-pass passage 1s open.

3. Anattachment for a liquid dispensingpump according to claim 2 including an elon-- gated recess within the wall of saidchamber and communicating with said by-pass passage to prevent buildingup-of pressure in said valve chamber when said, valve is shifted while said by-pass is closed.

4:. A liquid dispensing and measuring device, comprising a tank, a dispensing pump and a liquid meter in combination with an attachment connected to said pump and said liquid meter for controlling the flow of liquidv between said pump and said meter, said attachment including means" to permit communication of'said pump with said meter and said tank, and including pressure actuated valve means controlling such communication by the built up pressure of the liquid during tank, and pressure actuated valve means con-,

trolling said passages for sending the liquid discharged from said pump through said meter or back into said tank.

6. An attachment for a liquid dispensing pump, comprising a body, a valve chamber within said body, inlet, outlet, and by-pass passages communicating with said valve chamber, a pressure operated valve shiftably arranged within said valve chamber controllingcommunication of said outlet and bypass passage with said inlet'passage at predetermined pressures therein, means for securing the body detachably to the goose neck of a pump, said means comprising a tubular threaded clamp member, havlng a curved ribbed portion, and a co-acting curved member for clamping the goose neck to said curved rib portion. 1 In testimony whereof we affix our signatures.

CHARLES J. BELLAR. CHARLES R. YIRAVA.

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