US1213707A - Pneumatic pump. - Google Patents

Description

1. Wi. SWMSTROM.

PNEUMATIC PUMP.

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APPLICATION FILED AUG.2. 1913. RENEWED SEPT.21| 1916.

Lmfi Patented Jan.23,1917.

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PNEUMATIC PUMP. APPLICATION FILED AUG.2. 1913- RENEWED SEPT. 21 I9|6.

w'o msnm Jan. 23,1917.

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PNEUMAUCPUMP.

APPLICATION FILED AUG. 2. ISIS. RENEWED SEPT. 2l. 1916.

Patentd Jan. 23, 1917.

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o 94 I9/ /2 938588 I JOHN M. SWAN'STROM, OF CHCAG, LLINOS.

PNEUMATIC PUMP.

Specification of Letters Patent.

Patented Jan. 23, 1931?..

Application filed August 2, 1913, Serial No. 782,732. Renewed September 21, 1916. Serial No. 121,510.

To all whom it may concern.'

Be it known that I, JOHN M. SwANsTRoM, a citizen of the United States, residing at Chicago. in the county of Cook, State of illinois, haveinvented certain new and useful Improvements in Pneumatic Pumps, of which the following is a description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to devices for raising water by the action of compressed air sometimes known as pneumatic pumps and it has for its object to simplify the construction of such devices, to relieve strain on working parts and to protect the working parts against clogging or injury more effectively than has heretofore been done.

`With these ana other objects hereinafter described in view my invention consists in the construction and combination of parts hereinafter set forth and particularly pointed out in the claims.

Referring to the drawings: Figure 1 is a vertical sectional view through the center of the left hand water chamber shown in Fig. 2. Fig. 2 is a vertical sectional view on a line passing through the centers of the two water chambers. Fig. 3 is a vertical sectional view on the same plane as Fig. 2 showing the operating mechanism on an enlarged scale. Fig.y 4 is a top plan view partly in section, of the casting at the upper end of the water chamber. Fig. 5 is a top plan view of the operating lever and the frame which carries it. Fig. 6 is a bottom plan view of the frame which carries the operating lever. Fig. 7 is a vertical sectional view on line a.-a of Fig. 5; and Fig. 8 is a vertical sectional view on line b-b of Fig. 4.

Referring to the drawings 1 and 2 are respectively the left hand and right hand water chambers of the device, each comprising a cylinder having a head casting 3 at their upper ends and a bottom casting 4 at their lower ends. The head casting 3 has groove 5 formed in its edge to receive the upper edges of the cylinders 1 and 2 and the bottom casting 4 has similar grooves 6 to receive the lower edges of the cylinders. The upper and lower castings are secured together by rods 7 secured at their upper ends in openings 8 in lugs 9 on the head casting and secured. at their lower ends in similar lugs 10 on the bottom casting.

- The bottom casting 4 is formed with inlet opening 11 preferably protected Vby screen 12 and, concentric with each cylinder, the casting has an opening 13 in which is arranged an inwardly passage 15 connects the inlet 11 with the water chamber 16 beneath the valve. passage 17 leads from the interior ofeach of the cylinders to the outlet 18 which is provided with a check valve 19 and has con- 65 nected with it delivery pipe 20.

The head casting 3 has a depending flange 21 and between the cylinders 1 and 2 has a downward projection 22. Above this projection 22 on the upper casting is formed an upward extension 23 having formed therein valve chambers 24 and 25. Through the walls of the projection 22 are formed openings 26 and 27 communicating respectively with the water 7 5 chamber 1 and valve chamber 24, and with the water chamber 2 and valve chamber 25. Valve seats 28 and 30 are formed in the bottoms 0f the valve chambers 24 and 25 respectively and through these passages and 31 lead from the valve chambers 24 and 25 to passage 31 which leads tothe air supply pipe (not shown). In the upper ends of the valve chambers 24 and 25 are fitted rings 32 and 33 respectively holding g5 in place below them packing rings 34 and 35 respectively.

Over the top of the extension 23 is secured a cover plate 36 which is hollowed out on its under side and has sage 37 for an air outlet to the outer end yof which is preferably secured air discharge pipe 38.

Within the valve chambers 24 and 25 are arranged valves 39 and 40 of which the 95 valve 39 is adapted when in raised position to seat at its upper end against packing ring 34 and when in depressed position to seat at its lower end against valve seat 28 and similarly when the valve 40 is in raised 100 position it seats at its upper end against packing ring 35 and when in depressed position it seats at its lower end against valve seat 30.

The valve chambers 24 and 25 are, in cross 105 section, roughly triangular as shown in Fig. 4 with suiiicient bearing surfaces formed on the arc of a circle to guide the valves in their up and down movement so that the air can pass valve from the water chamber when the valve .is in depressed position, and out opening valve 14. A

face of the head formed therein a pas- 9o freely about the fio .through the opening in packing ring 34er 35, as the case may4 be, through the passage y37 to the air outlet.

The valves 39 and 40 each consists of an outer cylinder 41 closed at its upper end and having about its upper end a raised portion 42 adapted to seat against the packing ring 34 or 35. Fitting within this cylinder 41 is a cylinder 43 closed at 1ts lower end and provided on the outer face of its end with a rim 44 within which 1s held a packingl disk 45. The cylinder 43 at its upper edge has an out-turned flange 46 bearing at its periphery against the interior of cylinder 41. A collar 47 screwthreaded into the lower end of cylinder 43 serves as an abutment for the flange 46. A. spring 48 within the cylinder 43 bears at one end against the head of cylinder 41 and at the other end bears against the head of cylinder 43 and serves to press them yieldingly apart.

When the valve is free to move upward the pressure of the air through passage 29 or 31 will lift the valve from valve seat 28 or 30 and the spring 48 will cause the head ot' cylinder 41 to be quickly brought in con-l tact with the packing ring 34 or 35 closing the outlet for the air, the valve being held in this position until forcibly displaced.

Forward of the valve chambers 24 and 25 are check valve chambers 50 and 51 closed at their upper ends by plugs 52 and 53. Concentric with these valve chambers are openings 54 and 55 extending through the top casting. Into these openings within the water chambers 1 and 2 are inserted tubes 56 and 57 having valve seats 58 and 59 near their upper ends to receive long stemmed valves 60 and 61. The stem of valve 60 is pivoted at its lower end to a lever 62 which is fulcrumed in a bracket 63 carried at the lower end of tube 56. To the other end of lever 62 is connected a link 64, the lower end of which is connected to a lever 65 which is fulcrumed on a rod 66 extending downward from the top casting. To the other end of this lever 65 is pivotally connected a float 67.. The mechanism connected withthe ,valve 6l is the same as that above described as connected with the valve 60.

In the bottoms: of the check valve chambers are formed valve seats 68 and 69 about the openings 54 and 55. Check valves 70 and 71 having central projections 72 andv 73 on their upper ends and downwardly extending stems 74 and 75 non-circular in cross section on their lower ends are arranged in the check valve chambers 50 and 51. In the walls of the check valve chambers 50 and 51 near their upper ends are phragms 91 and 92. The upper end of the air tubes 82 and 83 extend through openings in the lower plate 85 and the sheet of lexible material into communication with passages 93 and 94 formed in the upper plate 88 and which lead respectively into the concavities 89 and `90.

The low-er plate 85 has concentric with the concavities 86 and 78 downwardly extending hollow projections 95 and 96 having openings 97 and 98 in their lower ends. Through these openings extend stems 100 and 101 to the upper ends of which are secured disks 102and 103. Surrounding and carried by the stems 100 and 101 are cylinders 104 and 105 which fit and slide vertically in the interior of the hollow projections 95 and 96. Springs 107 and 108 bear at one end against the inside of the end of projections 95 and 96 and at the other end bear vagainst the inside of the head of cylinders 104 and 105 and serve to press the disks 102 and 103 upward.

The cover plate 36 is provided with laterally extending arms 110 and 111 and with lug 112 midway between these arms. To lug 112 are pivoted by a pin 113 two levers 114 and 115, the central portion of the lever 114 being formed inverted U-shape in cross section and the lever 115 being inclosed between the sides of the inverted U. In the ends of lever 114 are carried rollers 116 and 117 in the path of movement of the stems 100 and 101. Against the pins 118 and 119 on which rollers 116 and 117 are mounted to rotate bear heads 120 and 121 of tubes 122 and 123 into which extend rods 124 and 125 having at their outer ends heads 126 and 127 which are adapted to bear against cylindrical pins 128 and 129 carried by upwardly extending lugs 130 and 131 on the arms 110 and-,111. Springs 132 and 133 bear at opposite ends against the heads 120 and 126, and 121 and 127 respectively.

The lower lever 115 is so formed that its upper edge is not in contact with the under face of the top of lever 114 so that it will not move with lever 114 When the latter begins to move in either direction but as soon as the under face of lever 114 comes against the upper face of lever 115 will force the latter to move with it.

In the ends of lever- 115 are mounted rollers 134 and 135. These rollers are arranged to bear against the upper ends of rods 136 and 137 which are mounted to slide vertically in openings in the top plate 36 and bear at their lower ends against the heads of cylinders 41 of the valves 39 and 40.

1n the operation of the device above described the parts being in the position in which they are shown in Figs. 1, 2 and 3, water chamber 1 being filled with water to, or nearly to,-the top casting, the valve 39 is lifted from the valve seat 28 and air under pressure enters through the passage 29 and openings 26 into the upper end of water chamber 1 forcing the water through passage 18 into discharge pipe 20 lifting check valve 19. While this is going on water chamber 2 is filling with water through the inlet at the bottom, the valve 14 lifting to permit the water to enter, the valve 40 being, as shown, in depressed position being held down by the pressure of the roller 135 of lever 115 on the rod 137 which in turn bears against the head of cylinder 41 holding the head of cylinder 43 against valve seat 30 shutting off the air supply and at the same time holding the head of cylinder 41 away from packing ring 35 so that the air in chamber 2 may escape freely.

When the water in water chamber 1 has been so far discharged that the float 67 drops, the valve 60 will be drawn down and air under pressure from the water chamber will pass through the opening 54, passage 78, opening 80, air tube 82 and passage 93 and, acting against the upper face of the diaphragm 91, will force it downward. rlhis forces the disk 102 downward and causes its stem 100 to force the left hand end of the lever 114 downward. As soon as the inner face of the inverted U shaped portion of this lever strikes the upper face of lever 115 it carries it downward with it causing its roller 134 to act upon the upper end of rod 136 to cause its lower end to press the head of cylinder 41 downward until the head of cylinder 43 is pressed against valve seat 28 shutting off the air' supply and at the same time as the head of cylinder 41 `is forced away from packing ring 34 the air above the diaphragm 91 is allowed to escape through passage 93, air tube 82, opening 80, assage 78, opening 54, past the check valve O, through opening 76, through valve chamber 23 out to the air discharge, so that the diaphragm 91 almost instantly collapses upward and permits the disk 102 and its stem 100 to be lifted by spring 107. The check valve 70 prevents any air pressure from passing back into the water cylinder 1.

rlhe movement of the levers 114 and 115 as above described relieves the rod 137 from pressure and permits the valve 40 to be lifted by the air pressure to cause the upper end of its cylinder 41 to seat against the packing ring 35 thus closing the air outlet. This operation continues so long as the air pressure is kept up the dropping of the float in one air chamber as the water 1s forced out of it by the air pressure, causing the levers 114 and 115 to be operated to shut od the air supply from one cylinder and turn it on to the other cylinder. The springs 132 and 133 serve to carry the lever 114 and with it the lever 115 to the limit of their movement and to hold the levers in position until by the action of the diaphragms they are again moved. rThese springs acting in opposite directions on the lever 114 relieve the pivot 113 of strain.

By arranging the levers 114 and 115 so that the lever 114 moves an appreciable distance before causing the lever 115 to strike the rod 136 the effect of a quick blow is produced upon the valve causing it to act quickly to shut off the inflow of air and open the outlet. ln this way escape of air is prevented which might happen by a slow movement of the valve. So also with the valve which is to be permitted to rise. By the quick movement given to the lever 115 the pressure on the valve is instantly released and the air pressure instantly raises the valve bringing its upper edge against the packing ring, this quick action being aided by the action of the spring in the valve.

At the instant at which lever 114 in its downward movement comes in contact with lever 115 it is nearly horizontal and as it continues its movement passing the horizontal plane of the axis of its pivot the springs 132 and 133 act to insure quick and positive movement. The springs 132 and 133 act in opposite directions and at the time the lever 114 is on the horizontal plane of the axis, by reason of this opposing action of the springs, there is no strain on the pivot of the lever and at other times the strain on vthe pivot is diminished. The springs'132 and 133 are of such strength that they hold the lever 115 and with it the lever 114 in the positions to which it is thrown by the action of either diaphragm and thus hold the valve which has been depressed firmly against its valve seat against the force of the air pressure thus completely shutting off the supply of air when the valve is down.

The concavities 86 and 87 of the lower plate of the diaphragmchambers are provided with openings as shown to permit the water in which the device is submerged in use to pass freely in and out as the diaphragms move up and down so as to permit them to move freely. rli`he upper plate 88 is imperforate and protects the diaphragms and to some extent the other working parts from any hard substance falling from above which might injure or clog these parts.

lt will of course be understood that the device may be used for raising other liquids than water and of course gaseous substances other than air may be used as the operating means. i

It will be further understood that I do not desire to be limited to the precise construction or arrangement shown as it is obvious that many changes in details of construction and arrangement may be made without dey parting from the spirit of the invention.

Having thus described my invention what I claim is :h

1.In a device for raising water by compressed air, a water chamber having an air inlet opening in its u; per end, a valve adapted to close the air inlet opening against the air supply pressure, means operated by the air pressure within the water chamber for causing the valve to close the air inlet opening against the air supply pressure, and means independentJ of the valve closing means for holding the valve in closed position. 2. In a device for raising water by compressed air, a water chamber having an air inlet opening in its upper end, an inwardly opening valve adapted to close the air inlet opening against the air supply pressure,

means operated bythe air pressure within the water chamber for causing the valve to close the air inletopening against the air supply pressure, means independent of the valve closing means for holding the valve in closed position, and means also operated by air pressure for releasing the valve..

3. In a device for raising water by compressed air, two water chambers arranged side by side, each having an air inlet in its upper end, a valve for closing each air inlet opening against the air supply pressure, a lever pivoted between the air inlet openings, and means operated'by the lever for causing the valve to close the air inlet openings against the air supply pressure alternately, means for swinging the lever past its dead center and resilient means arranged to swing the lever to position to cause it to effect the closing of a valve.

4. In a device for raising water by compressed air, water chambers arranged side by side, each having an air inlet opening in its upper end, valves adapted to close the air inlet openings against the air supply pressure, a lever pivoted betweenthe air inlet openings and means operated by the lever for causing the valve to close the air inlets of the chambers against the air supply pressure alternately, means for swinging the lever past its dead center, and resilient means arranged to swing the lever to position to cause it to effect the closing of a valve, comprising a resilient device having one end in engagement with the lever and the other end in the plane of the pivot of the lever.

5. In a device for raising water by compressed air, two water chambers arranged side by side, each having an air inlet opening 1n 1t s upper end, a valve for closing each air inlet opening :against the air supply pressure, a leverpivoted between the air inlet openings and means operated by the lever for causing the valves to close the air inlets of the two water chambers against the air supply pressure alternately, means for swinging the lever, and a resilient device bearing` at one end against the lever and having its other end arranged inline with the pivot of the lever.

G. In a device for raising water by compressed air, two water chambers arranged side by side, each having an air inlet opening in its upper end, a valve for closing each air inlet, a lever pivoted between the air inlet openings and means operated by the lever for causing the valves to close the air inlets of the two water chambers alternately, means for ,swinging the lever, resilient devices each bearing at one end against an end of the lever and having their other ends in the plane of the pivot of the lever.

7. In a device for raising water by compressed air, two water chambers arranged side by side, each having an air inlet opening at its upper end, an inwardly opening valve for each air inlet opening, a lever` pivoted between the two air inlet openings, means operated by the lever for causing the valves to close the air inlets of. the two water chambers alternately against the air pressure, means `for swinging the lever and a. spring for holding the lever in position to hold one or the other of the valves in closed position.

f8. In a device for raising water by compressed air, two water chambers arranged side by side each having an air inlet opening in its upper end, each controlled by a valve, a lever pivoted between the air inlet openings, means operated by the lever for causing the valves to close the air inlet openings of the two water chambers alternately, a second lever above the first lever pivoted on the same axis therewith and having its under surface spaced apart from the upper surface of the first lever, and means for swinging the second lever to cause it to effeet the swinging of the iirst lever.

9. In a device for raising water by compressed air, two water chambers arranged side by side, each having an air inlet opening in its upper end,each controlled by a valve, a lever pivoted between the air inlet openings, means operated by the lever for causing the valves to close the air inlet opening of the two water chambers alternately, a second lever above the iirst lever pivoted on the same aXis therewith and having its under surface spaced apart from the upper surface of the first lever, and means for swinging the second lever to cause it to' Laisser eifect the swinging of the first lever, and means connected with the second lever for holding it in the position to which it is swung.

10. ln a device for raising water by compressed air, two water chambers each having a lwater inlet at its lower end and each. having a valve chamber at its upper end communicating with the water chamber, an air inlet and an air outlet leading from each valve chamber, a valve in each valve cham ber adapted when in one position to close the air inlet and when in its other yposition to close the air outlet, and means for alternately moving the valves into position to close the air inlet leading to their valve chambers comprising a lever pivoted between the chambers.

11. ln a device for raising water by compressed air, two water chambers each having a water inlet at its lower end and each having a valve chamber at its upper endv communicating with the water chamber, an air inlet and an air outlet leading from each valve chamber, a valve in each valve chamber adapted when in one position to close the air inlet and when in its other position to .close the air outlet, and means for alternately moving the valves into position to close the airrinlet leading to their valve chambers, `comprising a lever pivoted on a line between the valve chambers, rods arranged to be. operated by the lever, and means for operating the lever.l

12. In a device for raising water byv compressed air, comprising two water chambers each having an air inlet and valve therefor at its upper end, operating rods for the valves, a lever arranged 'to bearat its ends against the op- "erating rods, a second lever pivoted .on the same axis with the first lever and arranged to bear thereon, and means forswinging the second lever on its pivot.

13. In a device for raising water'bycom-I pressed air, comprising -two water chambers each having an air inlet and valve therefor at4 ,its upper end, operating rods for the valves, a lever pivoted between the levers arranged to bear at its ends against, the operating-rods, a `second lever pivoted between the levers pivoted on the Same axis with the first lever and arranged to bear thereon, and means operated by the air pressure for swinging the second lever on its pivot.

14. In a device for raising water by compressed air, comprising two water chambers each having an air inlet and valve therefor at its upper end, operating rods for the valves, a lever pivoted between the levers arranged to bear at its ends against the operating rods, a second lever pivoted on the same aXis with' the rst lever and arranged to bear thereon, and means operated by the air pressure controlled by floats within the water chambers for swinging the second lever on its pivot. f

15. ln a device for raising water by compressed air, two water chambers each hav` ing an air inlet and valve therefor at its upper end, operating rods for the valves, a lever pivoted between the operating rods arranged to bear at its ends against the operating rods, a second lever pivoted on the same aXis as the first lever arranged to bear thereon `but to be capable of initial movement without moving the first lever, and -means for swinging the second lever on its pivot.

16. In a device for raising water by compressed air, two water chambers each having an air inlet and valve therefor at its upper end, a lever for operating the valves, van inwardly acting resilient device at each end of the lever havingfits outer end arranged in line with the axis of the lever, and means for swinging the ends of the lever past the line of the outer ends of the resilient devices.

17. ln a device for-raising water by compressed air, a water chamber having an air inlet, a valve adapted to close the air/inlet 'against the air pressure, means operated by air 'pressure to close the air inlet, and independent means forholding the valve closed.

rlhis vspecification signed and witnessed this 15th day of August, A. D. 1912.

Clans. BROWNING, RALPH N. WEBSTER.

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