US2674954A - Fluid pump - Google Patents

Description

J. J. COLBERT April 13, 1954 FLUID PUMP 2 Sheets-Sheet 1 Filed May 18, 1949 April 13, 1954 J. J. COLBERT FLUID PUMP Filed May 18, 1949 2 Sheets-Sheet 2 mm R M6 0 5 w V G mm A .iiu Z 3 W i x L Patented Apr. 13, 1954 UNITED STATES PATENT OFFICE FLUID PUMP Jeremiah J. Colbert, St. Joseph, M0.

Application May 18, 1949, Serial No. 93,927

1 Claim. 1

This invention relates to a fluid pump including in combination the diaphragm principle utilized in conventional pumps, as well as the principle of piston action or drive commonly found in other types of similar constructions, and is a continuation in part of my co-pending application, Serial No. 689,157, filed August 8, 1946, and entitled Pressure Water System, now abandoned.

It is the most important object of the present invention to provide a fluid pump that is relatively small yet compact and eflicient in its operation in that the same is capable of producing a continuous flow of fluid and operates at a capacity that equals many more complicated, large and expensive pumps presently in use.

Another important object of the present invention is to provide a fluid pump having a compartmented, hollow body wherein one wall thereof constitutes a flexible diaphragm separated by a partition that presents the compartments of the body, the diaphragm having two means for flexing the same, one on each side of the partition and the two portions of the diaphragm flexing in alternating opposite directions when the pump is in use. 7

Another important object of the present invention is to provide a fluid pump of the above mentioned type, wherein the two compartments or cylinders covered by the diaphragm, receive fluid from a common inlet pipe and discharge such fluid through a common outlet pipe, there being provided a number of chambers and passageways, together with a plurality of check valves, all novelly arranged to permit such operation.

Another object of the present invention is to provide a fluid pump wherein the two cylinders of the pump head are each provided with an inlet and outlet valve, the two inlet valves communieating with an inlet pipe and the two outlet valves communicating with an outlet pipe whereby a continuous flow is established and oncethe pump is placed in operation, the same will not get out of prime.

Other more minor objects will be made clear or become apparent as the following specification progresses, reference being had to the accompanying drawings, wherein:

Fig. l is a side elevational view of a fluid pump made in accordance with my present invention, parts being broken away for clearness.

Fig. 2 is a top plan view thereof, parts being broken away and in section to reveal details of construction.

Fig. 3 is a fragmentary, cross-sectional view 2 taken on line III-III of Fig. 1 looking in the direction of the arrows.

Fig. 4 is a fragmentary, cross-sectional view taken on line IV--IV of Fig. 1, looking in the direction of the arrows.

Fig. 5 is a fragmentary, detailed, cross-sectional view taken on line V-V of Fig. 2; and

Fig. 6 is an enlarged, elevational view showing one end of one of the piston rods per se.

A horizontal support [0, is illustrated in Figs. 1 and 2 of the drawings, having a plurality of legs I2. up-standing panel I4 upon which is mounted a 'base I6 for an electric motor or like prime mover [8.

The panel M has a pair of outwardly extending perforated lugs l9 at the uppermost edge thereof for receiving complementary lugs 20 on the proximal edge of the base l6.

Pivot pins 22 interconnect proximal lugs l9 and 20 for swingably mounting base l6 upon panel I4 of support ID. The base l6, therefore, overlies the support ID in spaced relationship thereabove and that end of base I6 opposite to the hinged mounting therefor, is supported by an up-standing bolt 24 carried by the support l0, bolt 24 slidably receiving the base l6 itself and it being provided with a pair of opposed nuts 26 and 28 for adjustably receiving base 16.

Support It) carries a pair of spaced apart bearings 30 and 32 for rotatably receiving an elongated shaft 34. Shaft 34 in turn receives a pair of spaced apart eccentrics, one only of which is illustrated in Fig. 6 of the drawing and designated by the numeral 36. The eccentrics 36 receive heads 38 and 40 of a pair of spaced piston rods 42 and 44 respectively. Rods 42 and s4 extend toward the plate [4 in perpendicular relationship to the shaft 34 and terminate within a hollow body. broadly designated by the numeral 46.

Shaft 34 is provided with a sheave 48 that is in turn operably connected with drive pulley 56 of motor 18 through the medium of a continuous belt 52. The hollow body 46 is elliptically-shaped as is a portion of the panel 14 to which body 46 is secured through the medium of a plurality of bolts 54.

The panel 14 is provided with a pair of open ings 56 and 58 for clearing the rods 42 and 44 respectively. Hollow body 46 is divided into a pair of compartments 60 and 62 in alignment with openings 56 and 58 respectively by a partition 63, the two compartments 60 and 62 being circular as shown in Figs. 1 to 4 inclusive. The open face of the compartments 60 and 62 proxi- Support I!) is L-shaped to present an 3 mal to the panel I4 is covered by a continuous flexible diaphragm 64 that is interposed between the hollow body 46 and the panel I4, thereby also closing the openings 56 and 58 in panel I4. Accordingly, the diaphragm 64 is held in place through the medium of the bolts 54.

Piston rod 42 is provided with a pair of spaced apart discs 66 and 68 disposed on opposite sides of the diaphragm 64, the disc 66 being within compartment 60 and the disc 68 being'exteriorly thereof. Discs 66 and 68 are threadably received by the proximal end of the rod 42 and are held in tight clamping relationshi with respect to the diaphragm 64 by a nut I0.

It is to be noted that the diameters of discs 66 and 68 are slightly less than the diametersof compartments 60 and the adjacent opening 56 in panel I4. The circumferential edges I2 of discs 66 and 68 are rounded and the sides of these discs 66 and t8 converge as the edge I2 is approached; Thus, as is particularly clear" in Fig. 3 of the drawings, the identical discs66 and 68 have substantially dome-shaped innermost and outermost faces and these faces each: consist of a flat, central surface and a beveled, marginal surface that surrounds the flat surface thereof. The two beveled surfaces of each of the discs 66 and 68, converging as the roundededge I2 is approached, present a working or flexing space for the diaphragm 6.4- between the discs 66 and 68 as is clear inv Fig. 3. The innermost,

flat surfaces of the. discs are clamped tightly against the diaphragm 64' when the nut. is drawn tightly against the, disc. $6, and the diaphragm 04 engages the proximal marginal edges of the discs alternately as the piston. rod 42reciprocates. Accordingly, whenthe piston rod. 42. reciprocates through rotation of shaft 34 and'by virtue of the eccentric 35, that portion of the diaphragm covering compartment 60. and opening 55, will flex to afford the pumping action. The particular formation of the discs 66 and 68 afford protection for the diaphragm 64, render ing the same long-lasting and not likelyv to wear at the points of flex.

Obviously, the piston rod 44 is likewisepro,

vided with a pair'of discs 74 and 76 of identical. formation to discsfit and 68 and'held in place by a nut 78 adjacent compartment 52' and opening 58.

A hollow member, broadly designated by the numeral 80, is formed integrally with the hol low body 46 and disposed in partial overlying relationship thereto. The hollow member 80" is divided into a pair of passages 82 and 84 by a portion 86 of the partition 63; and bottom wall 88, common to the passages 82' and 84 is provided with a pair of openings'eil and 92'.

Opening 90 places the passage 82 into direct communication with the compartment 60- on one side of the partitiontIi-fit and opening SZ-placeS the passage 34 in register with the compartment 52 on the opposite side of partition 63-85.

An external arcuate' web d integ-ral with the partition 63-86 provides supporting'means for that part of the hollow member 60 that extends outwardly beyond the hollow body 4-6.

A- hollow case broadly designated by the numeral 9t overlies the hollow member 89' and is secured directly thereto through the medium of a plurality of bolts 98. Case efiisdivided intoa pair of air chambers Hi0 andv I02 by a vertical dividing wall I 04 that is disposed-in a. plant that is perpendicular to a plane through: the

partition 63--86 and the web 94; The aiiichamav her I00 of case 96 is provided with an inlet pipe I06 adapted to connect with a source of fluid to be pumped (not shown).

The air chamber I02 has an outlet pipe I08 that may lead to a point of delivery of the fluid to be pumped.

A valve plate III} is interposed between the case 96 and the member 80, forming the bottom wall of the former and the top wall of the two passages 82 and 84 of member 80.. The plate H0 is provided with fouropeni'ngs, two of which communicate with the chamber I00 and the other two of which communicate with the chamber I02. These openings are provided with check valves H2, H4, H6 and H8 respectively. The valves just mentioned are of identical character in that the same are provided with a resilient disc I20, reciprocably mounted on a stem I22 and yieldably held in the closed position through the medium of a spring I24 coiled about the stem I22. Furthermore, the plate I-I0 has an air'vent slot I 26. adjacent each disc I 20 respectively-..

The two valves H2 and II4- are-disposedin the manner illustrated in Fig. 5' showing valve" H2. only. In other words, the discs I20 of valves: H2 and II 4 are within the passages 82- and 84 respectively. Fig. 5 also illustrates valve' I I0 and the manner in which both valves II 6" and H8: have their discs I20 within-.thechamben I02. It is clear therefore, that the check valves :II2 and H4 will permit passage of. liquid: in-on'ly' one direction, i. e. from chamber I 00to themembers 80. In the same-manner, check' valves H6 and: H8 will permit passage of: fluid only from the member to the chamber I02;

The passageways 82 and 84.- are. provided with check valves I28 and'I30respectivelyin theusual manner for admittance of air under pressure;

. flow downwardly through valve- I-I'2 into passageway 82 through opening 'andintocompart-- ment 60. On the=pumping stroke,piston rod '42 will move that part of' diaphragm 64 associated" therewith inwardly of the compartment BIL to force such liquid in the'compartment 60 out-- wardly through opening Bil-and into the chamber I02 by way. of valvev I Ifi for ultimateflow tea point of use by way of outlet I08.

The portionof'diaphragm M joined to rod' 44 operates in .thesame manner uti1izing.iinlet'clieck' valve .5 it and outletcheck valve H8.

'It is clear from the foregoing that a continu-- ous flow. of fluid' from inlet I06 to outlet I08 takes .place once the fluid pump i'splacedinopew ation and that priming. Will takeplacewnlyto initially start thexpumping: action. The stroke ofrthe pistons 42; short as illustrated and the speed may be adjusted; by: use: of: the support 24. and

the comparts 60 and 62of:'the; hollow I8 is energized i and 44 will beireciprocatedrbeoauseofithein and? 44' need only: be 1 relatively of shaft 34- through proper selection of pulleys 48 and 50. Through use of a single diaphragm 64 there is a more positive assurance that the same will stay in place between the body 46 and the panel 14 since any pulling action will be compensated by opposite portions of diaphragm 64 corresponding to rods 42 and M respectively,

The entire pump is easily manufactured and is extremely compact and arranged in a manner to provide balance and symmetry not only in appearance but in operation and handling.

While only one modification of the pump has been illustrated and described, the same is manifestly subject to many changes and modifications and those that fairly come within the scope of the appended claim, are contemplated hereby.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

In a fluid pump, a hollow body having a compartment provided with a pair of opposed walls, a flexible diaphragm forming one of said walls of the compartment, and a fluid opening communicating with the compartment; a reciprocable piston rod extending through the diaphragm; and means attaching the piston rod to the diaphragm including a pair of opposed discs mounted on the piston rod and having the diaphragm clamped therebetween, said discs each having a transversely rounded circumferential edge and a pair of opposed, substantially domeshaped faces, presenting a pair of opposed, flat central surfaces and a pair of opposed, beveled, marginal surfaces surrounding the flat surfaces and converging as said edges thereof are approached, each disc having one of its flat surfaces engaging the diaphragm.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,083,073 Loeber June 8, 1937 2,117,563 McMillan May 17, 1938 1,157,132 Joy May 9, 1939 2,240,371 Linch Apr. 29*, 1941 2,491,230 Theis Dec. 13, 1949 FOREIGN PATENTS Number Country Date 267,962 Italy Sept. 27, 1929 322,117 Italy -1 Oct. 29, 1934 958,262 France Mar. 6, 1950

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