US 3349995 A
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Description (OCR text may contain errors)
v0d. 31, 1967 J, M sHEEsLEY 3,349,995
RECIPROCATING BOOSTER PUMP Filed sept. a, 1965 2 sheets-sheet 1 l Arme/ VU Oct..31`, 1967 Filed Sept. 2, 1965 J. M. SHEESLEY RECIPROCATING BOOSTER PUMP 2 Sheets-Sheet 2 Job/7 JeeJ/ey I N VENTOR.
BY 19M w /LL/V United States Patent Otiice 3,349,995 RECIPROCATIN G BOSTER PUMP John M. Sheesley, R0. Box 14604, Houston, Tex. 77021 Filed Sept. 2, 1965, Ser. No. 484,647 3 Claims. (Cl. 230--52) This invention concerns booster pumps, and specifically those pumps in which gas or air under one pressure is 4received and in turn provided to distant points at a pressure greater than said one pressure.
The uses, in industry for pressurized fluids, including air, or other gases, are so numerous as to be legion. Moreover, the particular pressure, at which the pressurized fluid performs at its optimum, may well vary, depending on the particular use or on the particular device to which the fluid is supplied. Additionally, some operations are economically limited in the character of the pressureproducing equipment that may be provided at particular points or locations.
For the reasons discussed generally above, numerous -attempts have been made to produce economical pressure gener-ating or increasing pumps which can multiply the fluid pressure beyond that present in the line supplied to the pump. Examples of such prior devices include those disclosed in U.S. Patents Nos. 657,160; 1,161,787; 1,615,- 133; 1,740,924; 2,800,924; 2,977,040; and 3,053,435. However, for one or more reasons such prior devices have not proved to fully satisfy the wants or demands of the users.
Therefore, the device of this invention has as its principal object, the provision of a pumping mechanism which is capable of receiving tluids under pressure and, after operation thereon, providing fluids at a pressure up to substantially double that of the uids as originally provided. As herein used, the terrntluid includes all gases.
A further object is the provision of such a device that is 'both economical to produce and simple in construction and operation. These and still further objects will be seen to be accomplished after considering the following description and drawings, in which:
FIGURE 1 is a perspective of the assembled pump, parts being cut away to reveal the interior mechanism;
FIGURE 2 is a partial horizontal section taken along 2-2 of FIGURE 1;
'FIGURE 3 is a partial section taken along 3-'3 of FIGURE 1, showing the interior of the poppet valve mechanism;
FIGURE 4 is a partial section taken along 4 4 of FIGURE 1, .showing the air paths to gauges;
FIGURE 5 is a View partly in elevation and partly in section showing the interior of a four-way Valve.
Consider rst FIGURE 1, wherein the numeral designates, generally, the entire pump, which is in turn, divided into two separate, but substantially identical, cylinders 11 and 12. Said cylinders are axed to opposite sides, respectively, of central body block 13. Each of said cylinders are closed at their ends away from block 13 by heads 14 and 15, respectively. Ailixed to each of said heads and extending therebetween is tie rod 16. The means of attaching said rod to heads 14- and 15 may take the form of the bolt assembly depicted outside of head 14 in FIGURE 1, with similar undepicted members outside head 15, no specific type of junction being critical other than the requirement that said rod extend between said heads and afixed thereto. Within the enclosure defined lby cylinder 11, block 13 and head 14, the tie rod is seen to pass or be journaled through piston 17, creating enclosed areas 18 and 19 on either side of said piston. Within cylinder 12, piston 20 divides the interior of said cylinder into like compartments 21 and 22. Sleeve 23 is 3,349,995 Patented Oct. 31, 1967 seen to link pistons 17 and 20 into one unitarily acting body, said sleeve encompassing and slidingly engaging rod 16. The portion of sleeve 23 between heads 17 and 20 slidably reciprocates through a central opening or bearing portion 200 in block 13. Thus, in a manner hereinafter described, pistons 17 and 20, together with sleeve 23, may move as a unit transversely within pump 10, along and guided by rod 16.
Aflixed to one side of block 13 is plate 40, said plate being bolted to the block by connectors such as those designated by numerals 41. A similar plate 42 is so attached to the opposite face of block 13. Interior of block 13 a 4-way valve is displaced and operates in a manner hereinafter described.
Air or gas from the supply line will enter the pump 10 through input 50, said input communicating with aperture 51 in the block portion 1'3 (see FIGURE 2) as well as with a central -annulus 61 in the piston 62 of a 4-way valve designated as `60. Although specific placement is obviously not critical, the 4-way valve might be horizontally placed tow-ard the upper portion of block 13, as seen in 'FIGURE 1. The passageway surrounding annulus 61 may communicate with aperture 51. Of course, input 50 may branch in an ordinary manner so as to serve a separate opening in block 13 and connect directly with aperture 51, the object in either instance being to supply gas at line pressure to annulus 61 and aperture 51. Thus line air will initially pass through aperture 51, thence to tunnel 52 and out either end thereof to cavities 53 and 54, compressing spring biased check valves 55 and 56 and thereafter pass through apertures 57 and 5S in plates 40 and 42 to finally enter enclosed areas 19 and 21, equalizing the pressure therein.
Air from the same source 50, will also, on entering the area partially dened by annulus `61, follow the path devlined by arrow MM, said path connecting with cylinder port conduit 70 and thereafter with area 18 of cylinder 11. At this time it should be pointed out that piston 62 may naturally be shifted as hereinafter described to a further position wherein the line supplied air would be limited `by annulus I6101 and follow the path described by dashed line NN to enter cylinder port conduit 71, thereby flowing into area 22 of cylinder 12.
Initially, then, pressure would be equalized in chambers 19 and 21, while air from the supply line would circuitously enter chamber 18 through conduit 70. This would cause pressure to increase within chamber 18, tending to move piston 17 to the right as seen in FIGURE 1. Further, since the supply air would continue to enter charnber 21 through aperture 58, pressure would be exerted against piston 20, tending to displace it toward the right as seen in FIGURE 1. Build-up in pressure within charnber 19 would cause check valve 55 to close the juncture of tunnel 52 with cavity 53. Thus, the line pressure would be exerted against both pistons 17 and 20. Since said pistons are unitarily linked by sleeve 23 the effective force exerted is double that which would be caused by pressure build-up against one piston face alone. As piston 17 moves toward block 13 the pressure within cavity 19 may `reach approximately double that of the line pressure. This compressed air or gas may then pass through exit port 100, compress the spring biased exit valve 101, and pass into an exit line (not shown) connected to terminal port 102. Further compressed gas within chamber 19 may pass through aperture 75, duly restricted, if desired, by some check valve (not shown) and exit through opening 76 to operate gauge means as desired (see FIG- URES 1 and 4). Pressure tending to build up within chamber 22 is overcome in that gas would ilow counterclockwise, according to FIGURE 1, through conduit 71, as limited by annulus 61a to finally exit through exhaust port 77, i.e. along the path deemed Q-Q in FIGURE 5. As piston 17 approaches block 13, it will press against spring biased pin 80 of one of the two poppet valves shown in FIGURE 3. On said pin being compressed, the air trapped between piston 17 and plate 40 of block 13, may escape through port 81, which port is, in turn, connected, by means of tubing, to a port 82 in head 83; a further port 84 is shown in head 83, to illustrate the possibility of connecting exit port 81 to the 4-way valve in a number of manners. Or course on said air under pressure entering port 82, piston 62 will shift to its alternate position, wherein the cycle will be repeated with the pistons 17 and 20 moving to the left as viewed in FIGURE 1. [During this return trip, line supplied air would pass through line 50, along dashed-line path NN of FIGURE 5. This would build up pressure within area 22. Further, line gas would enter area 19 through aperture 51, tunnel 52, cavity 53, and aperture 57. Both of these pressure build-ups would tend to cause linked pistons 17 and 20 to move toward the left, as seen in FIG- URE 1. Gas within area 18 would move, via conduit 70 along path RR, to exhaust through port 90. As pressure within area 21 increases to substantially double that of the line pressure, spring biased'pin 110 would be compressed permitting the compresed gas to pass through port 102 as described earlier. Gauge readings may be caused by pressurized exiting of gas through apertures 130, 111 in block 13 (see FIGURE 4) aperture 111 being connected to the oppositely disposed counterpart of a gauge associated with port 76 of FIGURE 1. As piston 20 approaches plate 42 of block 13, it would compress pin 121 of the right-hand poppet valve shown in FIGURE 3, permitting high pressure gas to exit through port 122 to a connecting member leading to head 130, said head having apertures therein, such as 131 or 132, permitting the air pressure to force piston 62 of the 4-way valve to its initial position. lObviously the entry port 131, or 132, just as with the counter-part 82 and 84, may be plugged when not being used.
Thus, in connection with a description of the structure of this invention, the operation has been described. In summation, air or other gas from a supply line is caused to exert a pressure against similarly aligned faces of two pistons in two separate chambers. Since the pistons are linked together, and since there is pressure build-up within one of the chambers decreasing in size by virtue of piston displacement, the line pressure is caused to be increased. The movement of the pistons is then permitted to then reverse, and by virtue of valve and piston action, to have the same cycle occur. Although this invention has been described in terms of a single embodiment, it is obvious that numerous modifications may be made by one skilled in the art, it being the desire to limit the invention only by the following appended claims in which I claim:
1. In a pump for increasing the pressure of gas in a supply line, the combination of:
means for providing said supply line gas to a partitioned cylinder;
unitarily linked piston means for forming more than three chambers within said cylinder, the size of said chambers each being a function of the position of said piston means relative to one end of said cylinder, said piston means being slidably engaged with tie rod means, said tie rod means being fixed to opposite ends of said cylinder and extending therebetween and passing through a central block; and
valve means in said central block for reversing the directional motion of said piston means.
2. In a pump, the combination of:
chamber means having a iixed, 4-way-valve-encompassing portion centrally thereof;
rod means provided in said chamber means, said rod means being Xed to opposite ends of said chamber means and extending therebetween;
sleeve-connected pistons slidably mounted on said rod means;
means directing gas from a single source into a plurality of areas formed in said chamber means by said valve encompassing portion and said pistons; and
means for changing the direction of said gas.
3. In a pump for boosting the pressure of gas supplied,
the combination of:
an enclosed chamber;
a plurality of linked pistons movable within said chamber;
rod means positioned Within said chamber permitting the mounting thereon of said piston means, said rod means being fixed to opposite ends of said chamber;
means centrally disposed in said chamber for directing gas from a supply line against similarly facing sides of each of said pistons,
means for evacuating air at a pressure higher than that present in said supply line from said chamber; and
means for causing said higher pressure gas to emanate from diverse portions of said chamber on said pistons changing the direction of their movement.
References Cited UNITED STATES PATENTS 255,222 3/1882 Wang 230--54 756,903 4/ 1904 Spencer et al. 230-54 1,448,486 3/ 1923 Garraway 230-54 2,336,446 12/ 1943 Tucker et al. 103-52 3,162,133 12/1964 Smith 103-52 FOREIGN PATENTS 1,213,304 3/1960 France.
ROBERT M. WALKER, Primary Examiner.