US1437686A - Pump - Google Patents

Description

C. HLSELIN.

PUMP.

APPLICATION FILED MAY 28, 1921.

Patented Dec. 5, 19.22.

2 SHEETS-SHEET l.

C. H. SELfN.

PUMP.

APPLICATION FILED MAY 28, I921.

Patented Dec 5, 1922.-

2 S HEETSi-SHEET 2.

.dererl simpler, less expensive and others yatented Dec. 5, i922.

stares Allan lABLtdfi CHARLES H. SELIN, 0F BROOKLYN, NEKV YORK.

Application filed. May 28. 1921. Serial No. 473,423.

ments in pumps and it is an object of the,

present invention to provide a novel and improved device of this general character canbodying a structure wherein the main val ve and the pilot valve are enclosed in a single casting.

Another object of the invention is to provide a novel and improved device of this gen eral character wherein the pilot valve is normally held to its seat by a spring together with means whereby the tension oi the spring may be varied or regulated in accordance with the requirements of pra ctice. An additional object of the invention is to provide a novel and improved device o'l this general character embodying a main valve opening under pressure and whereinis enihodied a vent with which coacts a normally open valve closing by pressure controlled by a pilot valve.

The invention consists in the details of construction and in the combination and arrangement of the several parts ol my improved pump whereby certain important a lvantages are attained and the dev ce roumore convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed. v

in order that my invention may be the better understood, 1 will. now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view partly in section and partly in elevation illustrating a pump constructed in accordance with an embodiment of my invention and in applied position with. respect to a drainage tank or. reservoir.

Figure 2 is an enlarged view partly insection and partly in elevation oi my improved pump as herein disclosed.

Figure 8 is a view in elevation of my improved pump as herein disclosed and viewing the same substantially at right a: ,QlGS to the elevation in Figure 2: I

Figure l is a sectional view taken between the valve heads of the pilot valve.

. As disclosed in the accompanying drawings, T denotes a tank or reservoir 01 a gen eral type employed in connection wi 11 the drainage aboard vessels and particularly seagoing ships, although'it is to be understco-:l that said tank or reservoir T may be employed in connection with stationary work on land.

The lower portion of the tank or reservoir T in a side wall thereof is provided with an intake 1 under control oi acheckvalve 2, and

a second wall of the tank or reservoir T in its lower portion is provided with a discharme 3, with which is associated a check valve The tank or reservoir T includes a removable top orcover member M provided with a vent or port 5. I i I T he centralportion oithe top or cover M is provided with an opening 6 in which is suitably engagedthe lower end portion of an upstanding tubular member '7 through which is slidably di posed a rod8. The lower portion of the'rod 8 extends within the tank or reservoir T and terminates at a point normally in relatively close proximity to the bottom o it said tank or reservoir T. Secured to the loweror inserted end portion of the rod 8 is a head or disk 9., In the present emh'odiment of my invention, the head or disk 9 is secured to the rod 8 by a clamping screw 10 or the like whereby the postion oi said head or disk 9 upon the rod 8 maybe varied or adjusted as the requirements of practice may prefer. ornecessitate. i

The lower or inserted end portion of the rod 8 also passesthrough a sleeve ll substantially defining the opening 6 and which sleeve 11 is provided at its upper end with an upstanding flange 12 whereby the sleeve 11 may be effectively secured to the top M.

The sleeve 11 is provided in its upper portion with the longitudinally disposed slots i l, through which freely extend the elongated clamping screws 15. These screws 15 are threaded through an annular member-3 or collar 16 surrounding the sleeve 11 and havtion on the rod 8. The slots 1 1- provide means whereby the position 01' the collars l6 and 17 may be adjusted as preferred or required in a direction lengthwise of the rod 8,

lVhile Figure 1 or" the drawings show two clamping screws or members 15, it is to be understood that they may be 01" any desired number.

F denotes a buoyant member or float of an annular type providing a central opening 18 through which the sleeve 11 extends and whereby the float F has free sliding move ment lengthwise of the sleeve 11. The sleeve 1]. is of particular importance and advantage when my device is employed on sea going vessels, as the said sleeve pro vides an effective guard against breakdowns due to rolling and pitching of the vessel.

The movement of the float F lengthwise oi" the sleeve 11 is limited by the head or disk 9 and the annular member or collar 16, as will hereafter be explained, and said head or disk 9 and the annular member or collar 16 also provides means, to be explained later, whereby the flo t F operates to impart endwise movement to the rod 8.

Bolted or otherwise secured to the top or cover M is a relief valve body or casing 19, the bore of which being in communication with the vent or port The body or casing 19 is provided with an internal valve seat 20 and said body or casing 19 outwardly of the internal valve seat- 20 has in communication therewith a vent 21 adapted in communication with the atmosphere.

Coacting with the valve seat 20 is a plunger valve 22 snugly extending through a guide septum or plate 23 within the body or casing 19. The portion of the body or casing 19 outwardly of the septum or plate 23 constitutes cylinder 2 1 in which is snugly fitted a piston 25, said piston being carried by the outer end portion of the plunger valve 22. It is to be particularly noted that the area of the piston 25 is greater than that of the valve seat 20.

The outer end of the body or casing 19 and more particularly the cylinder 292- is open and saidopen end is defined by an outstanding annular flange 26 to which is bolted or otherwise SQilllGCl, as at 27, an outstandin flange 28 defining the lower open end. or a cylinder 29 formed in the easing C. Tnterposed between the flanges 26 and 28 is a gasket 30 so that the joint between said flanges will be pressure proof.

The inner head 31 of the cylinder 29 separates said cylinder from the chamber In communication with the chamber 32 is a pressure outlet 38 from which leads a pressure line {it in communication with the tank or reservoir T through a port 35 provided in the top or cover M.

Casting C outward of the chamber 32 is provided with a pressure inlet 36 in comder 29.

munication with the chamber 32 through an opening or port 37. The outer portion of the opening or port 37 is provided with a valve seat 38 with which cooperates a valve 2-39. The valve 39 is provided with an inwardly directed stem 40 which slidably disposed through the head 31 of the cylin- Snugly fitting within the cylinder 29 and secured to the stem 10 is a piston 41. The outer or top wall of the inlet 36 comprises pressure regulating cap 12 in ireaded engagen'ient with the casting C as particularly illustrated in Figure 2 ol? the accompanying drawings. Comprised in the c: ting C is a substantially cylindriwrl body d3 iaving disposed axially thercot a bore the opposite end portions of which being enlarged as at 4% and 4% Threaded within the lower portion i lis a member or body havinga central opening or port Also threaded within the portion l of the member of the body L3 is a cap 1-4, the applied cap 4:? and the member or body being spaced to allord chamber 4:8 therebetween.

Threaded within the portion 1 1 or": the member 4 1- of the body 13 is a cap 49 provided with a depending annular flange or skirt 50 which coacts with the inner all of the enlarged portion 11 3 and which is spaced from the side wall of said. enlarged portion whereby an annular chamber is provided. The lower or free marginal portion of the flange or skirt 5O COllSrl 1 valve seat 52 to be hereinafter referred to. The flange or skirt 50 is also spaced from a valve stem slidably disposed through the cap and said flange or skirt spaced 1'. from said stem to provide an annular chamber 54-. The chambers 51 and 54 are in communication one with the other through the ports provided in the flange or The chamber is in communication with the atmospl'iere through the port 56 provided in the wall 01" the body 43 The inserted end portion of the stem 53 is provided with the longitudinally spaced valves or heads 57 and 58, the same being connected by a reduced portion 52 of the stem.

The valve 5'7 cou ts with the valve seat 52 hereinbeifore referred to, while the valve 58 reacts with the opening or'port 1-6 hereinbefore referred to, i-issociated with the valve or head 5'7 is a guide disk 59 and a similar disk 60 is associated with the valve or head 58. The peripheries of the disks 59 and 60 are provided with the grooves or channels 61 for-a purpose to be hereinafter more particularly referred to.

The outer end portion of the stem 53 is provided with an enlargement 62 provided with oppositely directed trunnions (53 which are pivotally enqaged with the lifting arms 64 at a point in relatively close proximity to the pivotal connection 65 of said arms with the casting C so that upon swinging movement of the arms 6% corresponding endwise movement will be imparted tofthe stem 53 and the valves or heads and 53 can ried therebyv i 5 Extending transversely of the arm (hi-and positioned abovethe stem is a cross member 66 provided at itsl entral portion with a depending conoidal member or head 67 said member or head having direct contact with the adjacent'or outer end of the stem 53. Secured to the opposite end "portions or" the cross member 66 are the bars 68 which extend downwardly at opoosite sides of the body as and terminates'a desired distance therebelow. Connecting the lower extremities of the arms or bars is a second cross nenibe'r' 69. Threaded, upwardly through the central portion oi? the member 69 is a bolt or shank 70. The upper end portion of the shank 70 contacts with a head 71 carried by the lower or outer end portion of an elongated member or shank "l2 the member 72 telescoping within the cap 11' sothat said member 72 may be adjusted lengthwise lnterposed between the cap 4C7 and the head 71 is an expansible member or coil spring 73 encircling the elongated meniber or shank '72 and which operates to constantly urge. the'bars 6S and thehead 66 downwardly whereby the valve or head 58 normally closes the opening or port 426 and whereby the valve or head 57 is normally in an open position with respect to its seat 52. The

tension of the member or spring 73'1nay be regulated or varied as desired by proper adjustment of the bolt or shank 70.

The cylinders 242 and 29 are in continuation one of the other and the portions of said cylinders 24 and 29 between the pistons 25 and 4:1 constitute an expansion chamber E. In communication with the chamber E and the bore 4A oil the body 4-3 a port or passageway 74, the communication between. said port or passageway 74 and the bore 4&- being normally at a point between the valves or heads 5'? and 58 hereinbeforere- Ferred to. "ii second port or passageway 75, indicated by dotted lines in Figure '2, leads from the pressure inlet 36 to the chamber 18. 3

The plunger valve 22 hereinbeitore re.- ferred to is constantly urged into open position by an expansible member or coil spring 76 encircling the valve 22 and interposed between the piston '25 and the septum or plate 23. I

i lntending between the outer end portions of the arms 64: is the upper end portion or" the rod 8 and secured to the rod8 and above and below, the arms 64:" for, contact there with are the collars or sleeves 77 held in desired position upon'the rod 8 by the clamp ing screws 78 orthe likeQ The pressuremay be air, steamer other pressure will then pass from the inlet 36 throughthe passageway or port to the chamber 48 and from the chamber 48" through the port 46 into the bore 44; and through the peripheral grooves 61 in the lower disk or head 60 to the port or passageway 57. The pressure passes through the port or passageway 57 to the chamber E between the pistons and 4-1. The pressure will build up inthe chamber lil forcing the piston 25 downwardly to seat the valve 22 and thereby close the vent 21. At the same time the piston d1 will move iiipwardly and unseat the valve 395. The pressure will then pass from the inlet 36 into the chamber 32 and through the port 33 and the line 34 and will enter within the tank or reservoirT through 'theport 35 in the top or closure, member M and above the liquid within said tank or reservoir. Admitting the pressure on top of the water, sewerage or other liquids admitted within the tank or reservoir T, which is of a closed type, results in such liquid being expelled through the discharge 3. As the level within the tank or reservoir Tlowers the float 1 will move downwardly and when the sa ncomes into contact with the head or disk 9,

the weight of the float F will result in the rod 8 moving downwardly with a corresponding movement to the stem This downward movement of the stem 53 returns the valve orhead58'to its seat and moves the valve or head 57 into open'position; This cuts off the pressure in the chamber E and such pressure escapes through the passageway of the member lathrough the peripheral groove 61 in the disk or head 59 into the chamber 54 and from the chamber 54: through the port 55 into the chamber 51 and to the atmosphere through the port 56.

is the pressure is reduced in the chamber E the valve 39 returns to its seat and the ve 22 moves into open position. With the valve 22 in open position the pressure within the tank or reservoir T is discharged through the vent 21; The valve 22 moves from its seat by two forces namely by the pressure within the tank or reservoir T after the valve or head 58 seats, and also by the aetion'ot the expansible member or spring 7 The valve 22 remains open during the refilling of'the tanker reservoir T.

The cylinder 29 inwardly o the piston fiizl and thechamber 32 are in communication by a port 7 9 provided inthe head 31 and this port 79' serve's to prevent balancing the pressure on opposite sides of the piston fill;

ixed to the rod 8, by the bindingscrew or the like, in relatively close proximity the member '7 is a collar 81. interposed O1 and the adjacent end to between the collar or of the member 7 ani-ixpansible member or coil spring; encircling the rod 8. This' ansiblc member or spring 82 is particuarly adapted for use in the event the rod 8 and various collars carried thereby exceed a predetermined weight and preferably in ex cess of two pounds.

' is lea rly illustrated in Figure 2, the

extends in 'ardly ot the cylinders and whereby an abutment is prolimiting the upward or inward. l; oi the piston 25.

It is also to be understood that the arms 6% have suflicient freedom of movement with respect to the trunnions 63 to prevent bind ing when the arms are moved upwardly or downwardly as hereinbetore erred to From the foregoing description it is thought to be obvious that a pump constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason l do not wish to be understood. as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying, out my invention in practice except as hereinafter claimed.

I claim:

1. In combination with a closed tank provided with an inlet and an outlet and with a vent, a member provided with an expansion chamber and with a second chamber in communication with a pressure inlet, said member being; also provided with a vent in communication with the vent or" the tank, a valve controlling the flow through the vent ot the member and extending within the expansion chamber, the portion of the valve within the expansion chamber constituting a piston, means for normally urging the valve into an open position, a normally closed valve member controlling the communication between the pressure inlet and the second chamber and also extending within the expansion chamber, the portion of the valve member within the expansion chamber constituting a piston, and means operating upon the rise of the fluid level within the tank to admit pressure from the pressure inlet into the expansion chamber between the pistons to cause the first named valve to move into closed position and a second named valve to move into open position, saidmea-ns operating upon the fall of the liquid level to shut off the pressure into the expansion" 65 chamber and to vent the same,

2. In combination with a closed tank provided with an inlet, an outlet and with a vent, a member provided with an expansion chamber and with a second chamber in communication with a pressure inlet, said member being also provided with a vent in communication with the vent ot the tank, a valve controlling the flow through the rent or the member and extending within the expansion chamber, the portion of the valve within the expansion chamber constituting a piston, means within the expansion chamber and co-acting with the piston tor urging the valve into open position, a normally closed valve member controlling the coup munication between the pressure inlet and the second chamber and also extending within the expansion chamber, the portion of the valve member within the expansion chamber constituting a piston, and means operating upon the rise of the fluid level within the tank to admit pressure from the pressure inlet into the expansion chamber between the pistons to cause the first named valve to move into closed. position and a second named valve to move into open position, said means operating upon. the fall of the liquid level to shut off the pressure .into th expansion chamber and to vent the same.

3. In combination with a closed tank provided with an inlet and an outlet and with a vent, a member provided with an expansion chamber and with a second chamber in communication with a pressure inlet, said member being also provided with a vent in communication with the vent oi the tank, a valve controlling the flow through the vent of the member and extending within the expansion chamber, the portion of the valve within the expansion chamber constituting a piston, means for normally urging the valve into an. open position, anormally closed valve member controlling; the communication between the pressure inlet and the second chamber and also extending within the expansion chamber, the portion ot the valve member within the expansion chamber constituting a piston, means operating; upon the rise of the fluid level within the tank to admit pressure from the pressure inlet into the expansion chamber between the pistons to cause the first named valve to move into closed position and a second. named valve to move into open position, said means operating upon the fall of the liquid level to shut. off the pressure into the expansion chamber and to vent the same, and means within the expansion chamber for limiting the movement of the first named valve in a direction away from its seat.

t. In combination with a closed tank provided with an inlet and an outlet and with a vent, a member pro *ided with an expansion chamber and with a second chamber in communication with a pressure inlet, said member being also provided with a vent in communication with the vent oi the tank, a valve controlling the flow through the vent of'the member and extending Within the expansion chamber, the portion of the valve Within the expansion chamber constituting a piston, means for normally urging the valve into an open position, a normally closed valve member controlling the communication between the pressure inlet and the second chamber and also extending Within the expansion chamber, the portion of the valve member Within the expansion chamber constituting a piston, means operating upon the rise of the fluid level Within the tank to 15 admit pressure from the pressure inlet into the expansion chamber between the pistons to cause the first named valve to move into closed position and a second named valve to move into open position, said means op erating upon the fall of the liquid level to shut, off the pressure into the expansion chamber and to vent the same, a Wall of the pressure inlet constituting a pressure regu' lating cap.

In testimony whereof I hereunto affix my signature.

CHARLES H. SELIN.

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