US1857803A - Lubricating device and the like - Google Patents

Description

y 1932- A. BIZZARRI 1,857,803

LUBRICATING DEVICE AND THE LIKE Filed Aug. 8. 1927 3 Sheets-Sheet l 13 MVEN v /1 ATTORNEY May 10, 1932. B|ZZARR| 1,857,803

LUBRICATING DEVICE AND THE LIKE Filed Aug. 8, 1927 3 Sheets-Sheet 2 M INVENTOR with ATTORNEY May 10, 1932.

A BIZZARRI ,857,803

LUBRICATING DEVICE AND THE LIKE V Filed Aug. 8, 1927 3 Sheets-Sheet 3 ATTORNEY Patented May 10, 1932 their STATES ANTHONY IBIZZARRI, OF NEW YORK, N. Y."

LUBRICATING DEVICE AND THE LIKE Application filed. August 8, 1927. Serial No. 211,284.

My present invention relates to pumps, particularly but not exclusively pumps for the transmission of lubricant and other fluids, especially for heavy oils and greases, and 'aims to devise appliances of the general character specified which are simple in construction; which may be readily and economically fabricated and assembled; which consist of relatively few parts; which are compact in construction; and which in operation are characterized by their high speeds and the consequently high pressures which may readily be obtained with such pumps. The appliances of the present invention are further characterized by the economy in time and labor resulting from the use of such pumps, such pumps beingimmediate in their action both in the application of the lubricant or other fluid and in the speed with which such operation may be interrupted. The appliances of the present invention are further characterized by their capacity for delivering relatively large quantities of lubricants at high pressures in a given time, and

by their long life, durability andtheir little likelihood to get out of order and require repair. In one of their embodiments, the pumps of the present invention are characterized by their combining a series of pumps of different constructions, or of the same construction, used for different purposes, or for the same purpose, but all preferably driven from a single driving element. It is, however, to be clearly understood that'this form of pump constitutes but one specific embodiment of the present invention. It is further to be understood that other objects and advantages of the appliances of the present in vention will in part be pointed out in detail hereinafter and will in part be obvious to those skilled in the art to which the present invention relates.

In the accompanying specification I shall describe, and in the annexed drawings illuscrate, an illustrative embodiment of the present invention. It is, however, to be clearly understood that my invention is not limited to the specific embodiment thereof herein shown and described for purposes of illustration only. It is further to be understood that the present'application is a continuation in part of my previously filed co-pendi ing application, Serial .No. 148,359,. filed November 15, 1926 and entitled Highpressure pumps.

Referring to the drawings wherein I have illustrated the aforesaid illustrative embodiment of the present invention:

Fig. 1 is a side elevation of said embodiment of the present invention, shown partly broken away to show certain portions of the construction more clearly;

Y Fig. 2 is'a longitudinal sectional View of the grease or lubricant pump near the bottom of its stroke, with some of theparts' broken away to make the showing clearer;

Fig. 3 is a view similar to that of Fig. 1 showing the pump near the top of its stroke; and

Fig. 4 is a sectional view, partly in elevation, showing the air or other fluid pump forming a part of said embodiment substantially in longitudinal section and also showing portions .of the grease or lubricant tank inlongitudinal section.

Referring now to the aforesaid illustra tive embodiment of the present invention, and more particularly to the drawings, illustrating the same, 10 indicates a source of power, such as an electric motor 11,supplied with current from the cable 12 and preferably supported on a track 13 having the wheels 14 and the tail 15 to permit the device to be readily moved around from place to place as desired. I

The motor 11 has the bracket 20, having the reduced portion 21 and is also provided work of the motor, is a saddle'30 which may,

by means of the screws 31 or other suitable fastening means, be readily attached to the motor frame 16, in a manner which Wlll be more fully described later in the specification. 32 indicates the tank bottom which may have integrally cast therewith or other- Wise securely attached thereto the saddle 3O 5 already described. The tank bottom forming a part of the tank generally deslgnated byreference character 33 and which is intended to contain the lubricant-or like fluid or material, preferably includes the out er flange portion 34 having the inner tapered face 34. member 32 is hollowed out as indicated by reference characters 35 and 36; andis pro vided with the ledge 37 on which the main portion of the tank rests and with the ledge V 38 .on which the wire screen or other filter ,39 rests. The bottom member 32 is'likewise; .gprovided witlrthedelivery port 40 for delivv, eringzgrease;orlubricant or other. material to the grease pump shortly to be. described.

."Qmember 32 is provided withthe central hollow or substantially ,cupeshaped boss. 41,;

which-is internally.threaded, as at 42, reuceive vthe lower threaded Mend/l3 of the. holwith the bottom of the cavity 41, withinth boss41, is an inlet port 45 for the admission of air or other, suitablel fluid under pressure,

MWhich entersthe-interior of the tank by Imeansofthe-port46near the top ofthe i101,

,low clamping-member 44,-xvhich is provided with the. ,manipulatingvhandle 47.

The main tank portion 48 of the tank 33 5 ;has sweated. thereto, or otherwise 7 securely .attached to .;the,.eXterior of. the .lower edge po-1'tion 0f:1the;tank, member 48, a tapered .ringrshaped oranriularrmember 49, which is ,shapedto cooperate with the, internal tapered surface 34 of theffiange 34 of. the bottom: member;.32. -The screen filter. 50 is adapted,

.to fit overv the upper end ofthe tapered boss 1.41 and ;t0,-,be retained-thereon with sufficient security,,while;still (permitting the filter 39- ,1 to be readily removed when the. tank member 1481s removed a'fOI cleaning-"the device, or for replacement. 7 e

.51 is a'follower having the. central boss 52 permitting. the..follower.,to receiveand be guided along the hollow clamping member -.-;44,,-:the follower ,51: having the outer flange portion 53 contacting with the inner ,wall ofx-thetank'48. -54L-an d55-1'indicate handles for lithe manipulation of:the: tank member 48, the

- 5 upper or head-portion 56 :of whichis preferture aplurality of pumps,preferably pumps The lowerportion of theibottomm.

of different types of construction, although pumps of similar types of construction may be employed, and particularly pumps which may be adapted to different types of fluids, although pumps for pumping the same kinds of fluid may be employed. Another feature of the aforesaid embodiment of the invention isthat these pumps, whether two or more in number, are preferably driven by means of one and the same driving element, the construction and arrangement of the parts being such that great speeds and great pressures are rendered possible in a very efficient and simple manner.

In the form here being described by way of example merely, onejofthe pumpsis an air pump for. creating airpressureabove the follower 51 for forcibly feeding the'grease or other lubricant .into the other pump," which is V preferably agrease pump. ;.Tl1us the plurals Adj acentto its central portion, the bottom ity of pumps'embodied in the device now being described are functionallyas W8ll: as mechanically interrelated. It maybe that a third pumpmight beused inconnection with ithe-other two,'suchas'an oil pump driven .low clamping:member ,44. Communicating,

from the-same driving element andserving to. lubricate the other two pumps andalso, if so. desired, the electric motor itself. However, I. have not shown .this p'articularconstruction since it is not a part of the present invention. 7

Turning, now to the pump l constructions briefly referred to above, 60findicates an eccentric, housing :mclud ngw-thev cupshaped .sleeve 61 and the eccentricvpinaoiwboss- 62.

63" is akey sweatedorotherwise securlyatitached to the inner surface of-theeccentric cup 6lvsoias Ito-fit with-suflficient snugnesso-ver theflattened or-'segmental-clrcular endof themotorishaft 252.- Carried by the eccentric pin or boss .62-is a .ball bearing 64 comprising the inner raceway 65,"the outer raceway 66, and the ball ST-betWeen-the inner and outer . raceways 65 and 66,-.respectively.

The eccentric 62: is adapted to rotate within the eccentric housing-b0 comprising the tubular or nipple portion 68"fit-ting over the eccentric sleeve 61 and the shaft bracket 21,

fiHClI'tllG removable head 69 adapted to be at- .ztached, as by means of the screws 69 to themain portion of the eccentric housing 68. 63 1s a steel ball in'contact with a :por-

j t-ion oi the ball bearing 63, asagainst a point correspondingto the center of rotation on the inner raceway 64, so as .to serve to maintain the eccentric 60 and the ball-bearing 63 in proper adjusted position. 7 Communicating wlth the'eccentric housing (33 are a plurality, here shown as two, of pump housings or piston cylinders, one for each of the pumps communicating with the eccentric housing 68 and adapted to be driven by the eccentric 60 and the associated ballbearing 63. As already'indicated above, there may be more than 'two such pumps, but; I have, for i- IOU character 70, the same comprises a pump houslng 71 comummcatmg at its lower end with the eccentric housing 68 and having the piston cylinder or casing 72. Within the piston cylinder or casing 72 is the removable sleeve 73 having the channeled portion 74 for the purpose of providing space for'lubricant, a plurality of passages 7 5 being provided which permit the lubricant in the space 7 4 to come intocontact with the outer wall of the piston, generally designated by reference character 76. It may here be stated that the lubricating space 74 may communicate with a force feed lubricating system, so that the sleeve 7 3 and'the cylinder casing 7 2 may be w oil cooled, for which purpose an additional or a lubricating pump not here shown, may be employed, operated by the driving mechanism already described.

The piston 7 6 is preferably of the mushroom or hollow, open-ended type to provide for the greatest length of spring possible within the space allowed, as will hereafter be more fully described. Attached to the inner face of the piston 76, as by being integral therewith, is the piston rod 77 which may be hollow but is here shown as beingv of the solid type. I

It may here be stated that the removable sleeve 73 may be made of cast iron. Its removability is a very useful feature, since it permits the sleeve to be removed when it is worn and to be replaced with a new sleeve so that the pump may be' restored to its original state of accuracy, proper fit and efiiciency.

Below the removable sleeve 73 is the spring retainer 78 in the form of a cup-shaped memher having the side wall or substantially cylin drical portion 7 9 with the perforated upper or head portion 80 and the lower or flange portion 81 by means of which the spring retainer 7 8 is held in position with the flange portion 81 below the inner end ofthe removable sleeve 73.

82 indicates a follower which is adapted to reciprocate within the follower chamber 83 formed in the lower portion7l of the air pump 70. The follower 82 is in the form of a cup-shaped member, having the side wall or substantially cylindrical portion 84, the bottom portion 85 and the lower flange portion 86. 87 indicates a removable pin which passes through a hole 87 through the lower end of the piston rod 77 and against which is placed the bottom portion 85. of the cupshaped follower 82, said bottom portion-be ing so maintained by means of lhe spring 88 which extends between the inner face of the portion 80 of the retaining member 78 and the inner face of the portion 85 of the follower member 82. a

Due to the length of the spring 88, rendered possible by the construction described above, the spring is characterized by its great capacity, its long-life, and the smoothness and uniformity of its action. The lower end 77 of the piston rod 77 bears operatively against the ball bearing 62 carried by the eccentric 60. It will be noted that the movement of the piston 76 is strictly rectilinear.

That is, the usual side thrust, with the resulting frictional losses and rapid wear, to be found in the ordinary type of piston operated by a crank shaft will be avoided in the construction described above.

89 indicates the valve head provided with the inlet valve 90 cooperating with the valve seat 90 and provided with the spring 90". 91 indicates the outlet valve which cooperates with the seat 91 and the spring 91". The valve fitting 89 is readily removable as a whole for the replacement or repair of anyof its parts or for access to the other parts of the air pump structure. For this purpose the lower portion of the fitting 89 may be threaded for cooperation with the similarly threaded inner portion at the upper end of the sleeve 73. 92 indicates an internally threaded collar which fits over the flange 89 [of the fitting 89 to hold the same in place.

The outlet valve 91 of the air pump 70 communicates by means of the threaded coupling 93 and the air hose 94, which has the coupling 95 at its other end, with a channel 96 in the bottom member 32 of the grease tank 33. The channel 96 communicates with the inlet port and thus with the interior of the hollow clamping member 44 which, by means of the outlet port 46, permits air pressure to be applied to the follower 51 and thus to the grease within the tank 33.

Likewise communicating with the eccentric casing 68 and adapted to be operated by the eccentric within such casing, is a grease pump generally designated by reference character 100. The grease pump is, as already indicated above, preferably of a different construction from the air pump 70, although intended to be operated by the same mechanical means and substantially in the same manner asthe air pump 70. As already indicated above, the various pumps communicating with the eccentric casing 68, of which two are'hereshown by way of illustration merely, are arranged substantially radially or at an angle with respect to each other.

The pumps are not strictly geometrically radially disposed with respect to each other, since I prefer that, as clearly shown in Fig. 4 of the drawings, the axis of each cylinder and cylinder rod of each pump shall be offset with'respect to the center of rotation of the motor shaft 22. Iprefer this arrangement since Ihave found that by means of it the speed of the pump is accelerated and its efficiency substantially increased. In other words; there appears to be amarked increase inspeed and efliciency oft-he pumps when the axes the pistons-are ofi'set with respect to the cent-er of'rotation' ofthe motor shaft 20. l 'p're'ter also that where a plurality of p'umps,"al1 driven by the same drivingele- 'me'nt, as by means of the single ball bearing *ec'centiric 60 within theeccentric casing 68, are

em loyed; their'relative displacementsshall be-so chosen and selected that; while the speed of'each pump is the same,-t-he relative amounts of 'fiuids displaced by -the' respective pumps shall bearthe proper-relation to each other.

In the examplegiven, the displacement of the air pump is several times, as 'or times, 1. "that of the grease-pump. This proportion 1nay," howev'er,- be" varied at will, dependent upon the character of the pumps and the Workto' be doneby them, as well as by their relation to each other. In any event, the displacements of the pumps are so chosen as to 'ine'etthe 'pz-irticular requirements of each pump and of the relation which each pump bears to the other pumps in the system.

Returning now to thegrease pump,'wh1ch is more clearly shown in'Figs. 1, 2 and 8 of the: drawings, the 'grease' pump 100 preter- 'ablycomprises the plunger cylinder 101 within-'whichreciprocates the plunger 102. This I latter is 'prefe'rablyhollow, in order to provide a maximum' length of spring, as already indicated" above,'so asto provide a structure which 'is durable andunito'rm in its action.

The upper end 103 of-theplun'ger102 is open while the lower end :is' closed by the plunger end-"portion-1045'wh1ch is sweated or otherwise securely attached in the lower end 105 of the plunger 102. The inner portion 106 of. the plunger end 10-1 is preferably of reduced diameter and is threaded, so as to re ceivein its threads the lower end'107 of the spring 108. which extends to the top of the "cylinder wall 109 within the cylinder 101.

110 is an inlet 'pipe' tor grease or the like communicatingwith the outlet port to for *Q'rease at the bottom of the'bottom plate 32 of-the tank-33. 'Thepipe 110 communicates -witlr-andis'fitted into the inlet nipple 111 which'in turn communicates With the inlet port- 112of the-grease pump 100. While *the'inl'et'port 112' is smaller than the bore otthe pipe 110 and'the nipple 111, it is still preferably substantially larger than the V "diameter of the plunger 102 so that asubstantial amount of grease will flow into the interior of thepump 100 through the port 112 so as to maintain the pump at its maximum lfiClGI'l'CY.

V 113 indicates a reliet'valve which may serve was a primer while 11% indicates the outlet "from the pump. It will be noted that the pump uses neither an induction valve nor an educti'on' valve. It will be noted furtherthat the plunger 102 serves as a piston cut-ofi' valve to retain the rease within the cylinder space abovetheplunger 102. 'It mayhem-further be stated that the: hollow plunger'102 becomes quickly filled up' with g-rease which serves to lubricate-the spring 108 and serves also'to "make of the ho1low"plunger 102 whichis virtuallya solid'plun'ger or'piston for the expulsion of thexgrease or the like.

115 I indicates a cap screw which is screwed inte t-he upper endf116ofthe cylinder 101 and serves to-po'sition thevupper end of the spring 108. 117 indicates a-by-pass' valve comprising the fitting 118, the cap screw 119 serving to position the upper end of the spring 120; and the bal1 121 which controls the ports tothe passageway 122'sleading to the interior of the pipe- 110 and the'nipple Thiscompletes the description of the aforesaid illustrative embodiment of the present invention. The construction of said embodiapplied over the shaftend; theeccentric 61 slipped on over the end of the shaft,-the eccentric carrying the ball bearing and the pump parts inserted'in their respective cylinders, saidcylindersprefer'ably forming parts of the eccentric casmg, The eccentric casing head is now screwedin1place, which"brings the pointof the steel ball- 68 against a point of the ball bearing on the eccentric, this point corresponding to the-cen-terof rotation of the motor .sh'aft'22.

The outlet 1 of the air" pump is now:'connected by me'ansof the pipe 94 with the port communicating w th the interior of: the hollow clamping member 44:. The inlet of the grease pump is connected by means of the parts 110 and 111'withthe port 40at the bottom of the tank 33 beneath the filter 39. Assuming that 'the'tank is'fiill' of grease,

with the follower 51' near' the top ofthe'tank resting on the grease. but below theport hole 16. and assuming -al'so' that the outlet pipe 114 communicating'with the outlet port of the v grease pump 100 is connected by means of a ipe 123 with the outlet nozzle 124. by means of which the grease or other lubr cant is to be applied at the point or points desired. the device is now ready to be operated.

It may here be stated that the outletnozzle 12 may carry an electric switch 125,

held in place thereon by therine's or clamping members 126, 127. The switch-may be operatedby a finger128 which is so arranged that upon pressingagainst'the finger 128 by means of the thumb or other finger of theoperators hand, the motor circuit is closed, while on releasing the finger 128, the motor circuit is opened. The cable 12 leading to the switch is a continuation of the cable 12 leading to the motor and has connection with any suitable source of electric power not here deemed necessary to be shown.

This completes the description of the method of assembling the aforesaid illustrative embodiment of the present invention. The manner of operating said embodiment is likewise, it is believed, sufficiently clear from the foregoing description, but may be briefly summarized as follows:

Upon closing the switch 125, which switch is preferably located near the outlet end of the nozzle 124 so that the operator may, with a single hand, close the switch and keep it closed as long as he desires and maintain the same in operative contact with the connection where the grease or other lubricant is required, the motor is set in operation, thus rotating the eccentric and the ball bearing carried thereby. This operates the pistons and plungers of the air and grease pumps simultaneously and at the same speed. However, as indicated above, the displacement of the air pump is several times, as 10, 15 or 20 times that of the grease pump, so that there is quickly built up an air pressure sufficient to feed the grease in the tank 33 into the grease pump, with the expulsion of any air pockets, the grease being forcibly egected from the grease pump in the operationof the plunger within the same. Th s operation is effected without any induction or eduction valve in the manner already suggested above.

The operation of the pump is continued as long as lubricant is desired to be applied. Upon releasing the switch 125, the operation of the pump instantly ceases. the convenient arrangement of the switch 125 with respect to the nozzle 124, the pump may instantly be put into operation and as quickly stopped by one and the same hand of the operator, while applying the outlet end of the grease nozzle to the desired point. Due to the displacement or offsetting of the axes of the pump pistons or plungers with respect to the center of rotation of the motor shaft, the speed and efficiency of the device is greatly increased.

The structures of the various pump elements are simple, easy and economical to fabricate and assemble, and combine very efliciently for the intended purpose. The device is very compact, consists of relatively few parts which may be easily and accurately assembled, and is very economical in the amount of power and labor required for its operation. By operating the two or more different types of pumps from a single driving element, such as the ball bearing eccentric described herein, great economies in power In view of' are effected. Due also to the fact that the usual crank shaft type of operation is avoided, the usual side thrust action, which results inexcessive wear and frictional losses, is avoided. Y

In the present embodiment, the movement of the pistons or plungers is substantially strictly rectilinear. Due also to the fact that the relative displacements of the different kinds of pumps employed are properly chosen and selected, the various types of pumps combine effectively with each other even though operated at the same speed.

The structure of the tank is such as to eliminate air pockets, deliver properly filtered grease to the system, and permit the air pressure to be applied in a uniform and highly effective manner for feeding the grease into the grease-pump. The air pump is very effective and is so constructed as to permit the ready replacement of those parts of the same which will most likely become rapidly worn.

The same is true of the grease pump which,

occur to those skilled in the art to which the present invention relates.

What I claim as my invention is as follows: 1. A pump for lubricant and the like comprising, in combination, a motor having a motor housing and a motor shaft; a tank for lubricant or the like mounted upon said motor housing and comprising a bottom member provided with an air inlet and having an inwardly extending hollow nipple the hollow of which communicates with the inner end of said air inlet, a sidewall member and an associated top member, in combination with a hollow clamping member for holding said bottom, side-wall and top members in proper relation together, the

hollow of said hollow clamping member communicating adjacent its lower end with the hollow of said hollow nipple and communicating adjacent its upper end with the space within said tank; an eccentric housing, a plurality of pump casings operatively associated therewith, one of said pump casings containing the operative parts of an air pump and the other of said pump casings containing the operative parts of a fluid pump; an eccentric within said eccentric casing for operating both of said pumps; means connecting the outlet end of said air pump with the outer end of the air inlet of the bottom member of said tank; and means connecting the inlet of said fluidpump with the'outlet for lubricantor the like leading fromsaid tank.

2. A pump for lubricant and the like com- 51 prising, in combination, an electric motor having a motor housing and a motor shaft; atank for lubricant or the like mounted upon said motor housing and comprising a bottom member provided with an air inlet and having an inwardly extending hollow nipple the hollow of which communicates with the inner end of said air inlet, a side-wall member and an associated top member, in combination with a hollow clamping member for holding said bottom, side-wall and top members in properrelation together, the hollow of said hollow clamping-member communicating adjacent its lower end with the hollow of said hollow nipple and communicating adjacent-its uppe1-- end with the space within said tank; an eccentric housing, aplurality of pump casings" operatitely' associated therewith, one'of said pump casings containing the operative parts of an air pumpand the other of said pump casings-containing the operative parts of a fluid pump; 'a'ball-bearing casing for operating both of said umps; means connecting the outlet end of saidair pump with the outer end of the air inlet of the bottom member of said1t'ank;and means connecting the inlet of said fluid pump with the outletitor lubrica'nt'or the like leading from said tank.

In testimony whereof I have signed "my nameto this specification this 19th day"of July, 1927. p

ANTHONY BIZZARRI.

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