US2255851A - Pump assembly - Google Patents

Description

Sept-16, 1941- K. E. LUNDIN 2,255,851

' PUMP ASSEMBLY Filed Oct. 21, 1940 3 Sheets-Sheet 1 KWTE. A u/vw/v,

1 N VE N TOR.

' 77'ORNEX Sept. 16, 1941. K. E. LUNDIN PUMP ASSEMBLY Filed Oct. 21, 1940 3 Sheets-Sheet 3 Kmart. lu/va/Al,

1N VENTOR.

Patented Sept. 16, 1941 PUMP ASSEMB Y Knut E. Lundin, Los Angeles, Calif., assignor to Radial Pump and Compressor Company, Los

Angeles, Calif.

Application October 21, 1340, Serial No. 362,089

3 Claims.

This invention relates to pumping devices and particularly to a pumping assembly which is an improvement upon the pump structure for pumping either air or water or a combination of both, described in my co-pending application, Serial No. 330,518, filed April 19, 1940.

By the present invention the meritorious features of the piston structure set forth in my said application are maintained and a more sturdy dependable means is provided for supporting the multiple pump and its operating means, so that the vibration resulting from the rotation of the driving shaft and parts gyrated thereby does not tend to cause an injurious effect upon any part of the apparatus.

Stating more in detail the objects and advantages of the present invention, thereby an improved pair of castings is provided, the lower casting of the pair being adapted to form the basal and underlying support of the whole apparatus and at the same time serying as a supply means for the air and water, the upper casting serving as an outlet means for the fluid pumped thereupinto from the lower reservoir; and improved spacing and securingmeans being provided whereby said reservoirs are maintained at a proper vertical space from each other, thus providing room between them for the pump struc-, ture, which is superimposed upon the lower casting and is housed in a thoroughly protected manner between the two castings.

Still another object of the invention is to provide an improved piston cylinder head structure for each of the piston cylinders and at the same time utilize such structure as a part of an improved housing means for the pumping structure. With the foregoing and other objects in view,

the invention resides in the novel arrangement 7 and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of the subject matter claimed without departing from the spirit of the invention.

Referring to the accompanying drawings, which illustrate what is at present deemed to be a preferred embodiment of the invention,

Fig. l is a side elevationof the-complete apparatus.

Fig. 2 is a transverse section thereof, the plane of section being indicated by the line 22 on Fig. 1.

Fig. 3 is a vertical mid section of the complete apparatus except that the motor casing which surmounts the structure illustrated is shown in side elevation.

Fig. 4 is a stepped transverse section, the plane of section being indicated by the angular line 4-4 on Fig. 3.

Fig. 5 is a perspective of one of the water piston cylinder heads, all of which are of the same design and serve as spacers between the upper and lower hollow castings. I

Fig. 6 is an end view of one of the water piston cylinder heads, shown in Fig. 5.

Referring in detail to the'drawings, the structure shown comprises as to its main parts enumerating them from below upwardly, a lower casting Hi having foot portions II for resting upon a horizontal support, an upper casting l2, a series of combined piston cylinder heads and spacers I3, |3w which serve to separate said castings vertically to a sufiicient extent to provide room between them for the pump structure M, a gear case or gear housing l5 resting upon said upper casting l2 and containing gearing l6, and a motor housing ll which is supported by said gear case I5.

Thelower casting I3 is of a six arm, stellate character and contains a lower chamber 2|] and an upper chamber 2|, these chambers .being in the present embodiment respectively used for water and air, thewater entering the chamber 23 through a supply pipe 22. Said chambers 2| and 22 are separated by a partition wall 23, the air supply conduit 24 for the chamber 2| being shown in Fig. 3.

The stellate character of the chambers 20 and 2| is well illustrated in Fig. 2 where the lower chamber 20 is shown furnished with three radi ally extending arm portions 213a, 2017, and 200, and the upper chamber 2| is shown furnished with radially extending arm portions 2|a, 2lb, and 210, the arm portions of one chamber alternating symmetrically with those of the other chamber;

The central portion of the lower casting is furnished on'its upper side with a flat circular rise 26 and upon this rise is superimposed the central portion of a pump housing frame 21 which includes a series of six pumping cylinders, three of which 3|, 32 and 33 are shown for pumping airand alternating other three 34, 35 and 36 for pumping water. Said cylinders occupy substantially the same horizontal plane and are circumferentially arranged in relation to the center of the frame 21 with their axes extending radially. The three water pumping cylinders and their pistons P and adjacent parts are shown as being of identical construction and, therefore, are all letter-ed in the same manner.

The upper hollow casting I2 in the main is shaped similarly to the lower casting I and contains an air reservoir 201' and a water reservoir 2Ir. Said casting engages the upper side of the frame 21 in a similar manner to said casting I0, being furnished with a depressed wall portion 44 which fits into a circular depression provided for it in the upper face of the pump frame 21. Said frame is hexagonal and its open top and bottom, in the assembled structure, are closed respectively by the upper casting I2 and the lower casting I0. V

The upper casting I2 has a flat top throughout its central part, and on this flat part rests the aforesaid gear case I5, said gear case, in turn, supporting the motor casing II. ing- I2 has a tubular central portion 45 within which is abearing sleeve 46 which receives a vertical shaft41, said shaft 41 is driven by the motor ,I'Im, the motor shaft 48 operating the primary member49 of the reduction gearing I6,

the final member 50 of said gearing being secured to the power delivery shaft 41 already mentioned. .The, reduction .gearing construction ineludes-a transmission-shaft! and a pinion 52, the latter pinion being in mesh with aforesaid gear 50. The lower end of the shaft 41 carries a crank disk 53 which gyrates an eccentric pin 54 which in-turn gyrates a piston operating head 55 ,with which. the inner end of each of the piston;rods,is pivotally connected, except the master rod 51, which is secured in a fixed relationjto said head, i

,Eachjwater, pumping piston cylinder and its related. parts, well shown in section in the righthand portionof Fig. 3, includes the piston cylinder.35 havi ng fitted within it a piston head 38, toithe outer face of which is attached a leather gasket33 having a flexible peripheral-lip 40 which is directed away from the outer end of the piston. 'Within the cupped portion of the gasket is nested the rubber disk 39a which is maintained in a compressed relation thereagainst to provide adeak proof. condition between said peripheral lip 4Iljandits cylinder wall by means of the follower plate39 b and cap screw 39c,

1 Against the'outer ends of the piston cylinders 34, "35.and 36 abut, in a fluid tight manner the pistoncylinder heads I3w. Each of said heads has extending through it a vertical passage 4I withan expanded lower inlet portion 4Ia and at its upperend an expanded outlet portion 4Ib, these expanded portions respectively containing the ball check ,valves, 42 and 43. Above the ba 11,4 2 is a stop pin 42s and above the ball 43 is astop pin 435.- The central portion of the passage 4! is kept in communication with thepiston jiylindenbymeans of aspacious horizontal funnel shapedpass age 4Ic which is located centrally of the head I310 and which hasits large end directed toward the piston cylinder.

' gTh head I3 'w of each water" piston cylinder has a plug 58 screwing into the outer end portion of thelpas'sageflcgthis'passage being of sufficient size to afford access for anoperating tool intoandthrough "theheadl so that the workman need not detach 'the he'a'd to obtainaccess' to theiriterionthjereof in order to apply the tool tdithe capiscrewfific. All six' piston cylinder heads 'are shown held in'place by cap screws 59. filt order: tomake room for'the heat radiating fins fortheair cylinders each arm of the lower The upper cast-,

directed mouth portions 25y;

casting Ill has its upper side in a downwardly spaced relation to said fins, while the corresponding arm of the upper casting I2 likewise has its lower side in an upwardly spaced relation to the subjacent fins.

The flanged mouth portions 20.1: of the lower six arms all lie in the same horizontal plane which is on a level with the bottom faces of the piston cylinder heads I3 and I3w. The similarly flanged mouth portions 201 of the upper six arms are correspondingly arranged, being directed downwardly to the level of the upper faces of the piston cylinder heads I3, I3w. Said upper mouth portions are identical in construction with those shown in plan in Fig. 2.

The piston heads I3 for the piston cylinders 3|, 32 and 33 that contain air, are constructed somewhat differently from those of my aforesaid pending application, containing an upwardly directed lower inlet passage 60 which communicates with the adjacent piston cylinder through a valve sleeve BI that is screwed into a threaded collar 64 against which operates a compression spring 65 tending to hold the valve to its seat. The valve operates through a spider structu're'66 carried internally by the sleeve 6|. Downwardly into the upper portion of the piston cylinder head I3 leads an intake passage 61 which communicates with the inner end of a valve cage 68, having near its right hand end an internal valve seat for the head of the valve 69. The latter valve is provided with a stem I0 which'slides within a socket II provided for it in the head I3. A spring 12 completes "this part of the structure and tends to hold the valve 69 upon its said seat. 7 With the lower passage 60 communicates one ofthe three arms of the lower air supply chainber, whereas with the upper passage 61 communicates one ofthe three arms of the upper air reservoir.

The aforementioned piston operatinghead,

said pin, and into this socket screws a screw 16,

the head of which engages a washer or disk 11' which engages the lower end of said bearing to keep it in place.

The air reservoir of the upper casting I2 is furnished with an air delivery outlet pipe I8, and the water reservoir of said upper casting is provided with a water delivery pipe 79.

Around the upper part of the lower casting Ill extends a hexagonal flange and a like flange 8I extends around the lower part of the upper casting I2. Cap screws 82 extend through these flanges into the corner portions of th'ehexa gonal frame 21 to secure together the parts I0, I2 and I4. The piston cylinder heads-I3 and I3w. are provided at their outer ends with upper flanges 83 which (except for an intervening gasket) abut against the flanges of the downwardly and lower flanges 84 which, (except for an intervening gasket) abut against the flanges of the lower mouthp'or-' tions 201:. There are six upper and lower mated flanges, which are securely held together in each instance by an outer spanner bolt 85 and the side spanner bolts 86. When it is desired to tighten the cap screw 390 it is necessary to remove the spanner bolt 85 before access may be had to the plug 58.

The gear housing I is secured to the flat top wall of the upper casting l2 in any suitable manner, for example, by screws 81.

Upon the flat top of said gear housing is superimposed the motor housing the latter housing having a peripheral basal flange 88 provided with suitable apertures to receive screws 89 whereby the motor housing is secured to said gear housing.

It will aid in understanding the operation of the apparatus, to point out the course the water follows through the passages shown in the right hand portion of Fig. 3 on its way from the water chamber 20 up to the water reservoir 211*. 7

As the pin 54 of the crank disk 53 continues its gyratory movement from the position of Fig. 3 it, in turn, imparts a gyratory movement to the piston operating head 55, thus causing the master rod 51 (which is in this instance substituted for a piston rod like the rod 55 at the opposite side of the head 55) to start the piston head 38 on its leftward travel. Thewater, which has previously entered chamber 20 through supply pipe 22, is now entrained from said chamber upwardly past valve 42, through the passage 41 and Me into the piston cylinder 35. After the piston head completes its leftward movement and moves toward the right, the water is ejected from the cylinder 35 through the passage 4| and, passing upwardly from said passage past the valve 43 enters the superjacent arm of the stellate shaped water reservoir 2lr. During the outward movement of the piston head 38 the compressed water in advance thereof will tend to additionally expand the gasket structure and cause its peripheral lip 40 to make a more liquid tight fit. Wear upon the gasket is thus compensated for.

While the water is thus being pumped upwardly through the right hand portion of the structure shown in Fig. 3, the air, through an opposed cycle of operations, is being pumped upwardly in the left hand portion thereof, this air pumping operation being similar except for a difference in the passage which communicate with the piston cylinders 3i and in the valves mounted in said passages. From the air chamber 2| th air is entrained through the passage 60 and thence enters the left end of the sleeve 6! within which the valve 62 operates. The suction of the adjacent receding piston head will then entrain the air past the valve 62 into the piston chamber 3i and the return movement of said piston head will expel the air past the upper valve 69, thence through the sleeve 58 and into the air reservoir 251' via the vertical passage 10.

From the foregoing description of portions of the operation, the simultaneous functioning of the other four pistons and their related parts will readily be understood.

What is claimed is:

1. In a pumping assembly, a lower water chamber of a stellate character, the points or arms of said chamber extending in generally horizontal directions, a lower air chamber overlying said water chamber, said air chamber being also of a stellate character and having its arms arranged in alternation with the arms of said water chamber, a pump structure superimposed upon the structure of said chambers, said pump structure having piston cylinders provided with pistons radiating from a common center, alternate piston cylinders being in valve controlled communication with the arms of said water chamber and the intervening piston cylinders being in valve controlled communication with the arms of said air chamber, a stellate shaped water reservoir overlying said pumping assembly and having its arms in communication with the piston cylinders which pump water, a stellate shaped air reservoir overlying said water reservoir and having its arms arranged in alternation with the arms of said water reservoir and in communication with the pump cylinders which pump air, and a driving shaft operatively connected with the inner ends of said pistons.

2. The subject matter of claim 1 and, said driving shaft extending downwardly through said upper reservoirs and terminating above said lower air chamber.

3. In a pumping assembly, a lower casting having foot portions to rest upon a horizontal support, said casting having upper and lower wall portions with a space between them and a transversely extending partition between said wall portions dividing said space into an upper and a lower chamber for air and water, a pump structure superimposed upon said lower casting, said pump structure having a plurality of piston cylinders containing pistons radiating centrally therefrom, the outer ends of said cylinders having heads, valve controlled passages within said heads, an upper casting superjacent to said pump structure, said upper casting having within it reservoirs to receive air and water delivered from said valve controlled passages, said cylinder heads serving as spacing members between said castings to maintain them sufliciently separated vertically to provide room for said pump structure, and securing means for said cylinder heads to aid in maintaining the entire structure in a properly assembled relation, said valve controlled passages communicating with said piston cylinders to complete a pumping means for forcing air and water upwardly from the chambers of said lower casting to the reservoirs of said upper casting.

KNUT E. LUNDIN.

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