US2467942A - Pump - Google Patents

Description

April 19, 1949, 5, (3, MARCH 2,467,942

PUMP

Filed Sept. 25, 1947 ATTORNEY Patented Apr. 19, 1949 UNITED STATES PATENT OFFICE PUMP Simon Jonathan George March, Wellsboro, Pa.

. Application September 25, 1947, Serial No. 776,012

This invention relates to pumps for pumping water or other liquids. This application is a continuation of my application Serial No. 668,074 for Pump, filed May 8, 1946, now abandoned.

It is an object of the invention to provide an improved type of pump wherein a flexible section or boot is connected to the upper end of a supply pipe, which pipe in turn is connected at its lower end through an intake to the source of supply of liquid to be pumped, the supply pipe having a discharge conduit located between the boot and intake through which the liquid is discharged by the pump. The lower end of the flexible boot is secured to the upper end of the supply pipe and the upper end of the boot is provided with a plunger having an opening into a flexible tube. The flexible tube, of smaller diameter than the boot, is connected at its lower end to the boot and at'its upper end to a conduit which in turn is connected to a return pipe which extends into the source of supply of liquid to be pumped, this arrangement providing means for priming. The plunger, attached to the boot, is secured to a pump rod extending downwardly through the supply pipe and it may be reciprocated to operate the pump. The flexible boot and flexible tube to which it is connected is mounted within a chamber which may be sealed oif from the atmosphere. This arrangement, as explained later, facilitates the pumping operation.

Although the novel features which are believed to be characteristic of the invention will be pointed out in the claims appended hereto, the invention itself as to its objects and advantages and the manner in which it may be carried out may be better understood by reference to the accompanying drawing forming a part hereof, in which Fig. 1 is a perspective View in elevation of apump embodying the invention, and

Fig. 2 is a view in vertical section of the pump shown in Fig. 1.

Referring now to the drawing, in which like reference characters denote similar parts, the supply pipe 2 has a T 3| at its bottom end, the side outlet of which is connected to a check valve 3. The check valve 3 provides an intake for liquid to be pumped and it is connected so that liquid may flow into supply pipe 2, but not out of it in the opposite direction.

' The lower end of the T 3| is provided with a packing gland I through which extends a re-' ciprocable pump rod l8. The pump rod I8 is connected by a cross piece 32 to a vertically extending handle rod 33 provided with a handle 26.

6 Claims. (Cl. 103-148) The upper end of the pump rod ['8 is secured by a spider bracket 34 to a plunger 9, which is described in further detail hereinafter. The pump rod It may be kept centered in the supply pipe 2 by means of a hollow spider bracket 23 through which the rod may reciprocate, up and down.

Another T 35 in the supply pipe 2 provides an opening to which is connected the discharge conduit 2m of the pump. The discharge conduit is provided with a discharge check valve 4 and a shut-off valve 2|. The check valve 4 is connected so that liquid may flow outwardly from the supply pipe 2 but not in the opposite direction. The shut-01f valve 2i may be of any type which will fully close and open. The supply pipe is also provided with an openable and closable vent cock 25.

The supply pipe 2 extends upwardly through a flat disk ring 5 which is secured to the pipe by welding or in any other suitable way to make an airtight connection. This flat ring 5 provides an annular shoulder to support an air cylinder l9, later to be described. The upstanding open end of the supply pipe provides a nipple "I to which is secured a flexible boot 8 made of rubber or other suitable water resistant flexible and collapsible material.

The lower end of the boot 8 is stretched over the end of the nipple 7 of the supply pipe and is then clamped tightly to it by means of a split clamping ring 30. The upper end of the flexible boot 8 is stretched over a circular plunger 9 and secured tightly to it by means of a split clamping ring 36.

The plunger 9 is provided with an upwardly extending nipple l0 and is provided with a passageway 37 through the plunger. The lower end of a flexible tube H of smaller diameter than the flexible boot 8 is stretched over the plunger nipple I 0 and secured tightly to it by a clamp ring 38. The tube I I may be made of rubber or other suitable flexible material Which is resistant to water and it is of sufficient length to permit plunger 9 to move vertically the full length of the movement of the plunger when the boot 8 is caused to col-' lapse as later described.

The upper end of the flexible tube I l is secured to a nipple l2 which extends through a flat disk ring 40 which rests upon the cylinder I9. The nipple I2 is secured to the disk ring by welding or in any suitable way to make an airtight connection. The tube is stretched over the nipple and tightly clamped to it by means of a clamp ring 4|. y

The air cylinder 19 is provided with an annular 3 flange 42 at its bottom end and a similar annular flange 42a at its top end. The flange 42 is secured to the disk and the upper flange 42a to the disk 40 as by means of bolts 43. Suitable gaskets 46 are provided to insure airtight connections. The air cylinder I9 is also provided with an openable and closable vent cook 20. It Will be noted from the foregoing that the air cylinder I9 is constructed so that communication between the space 44 (in the cylinder outside the boot 8 and tube H) and the outside atmosphere may be closed ofi, thereby providing an airtight chamber.

A T I3 is secured to the upper end of nipple H. The upper end of the T |3 is provided with a nipple and check valve l4 and a shut-off valve I5. This check valve I4 is connected so that liquid can flow out of the T |3- but not through the check valve into the T. The valve I5 may be of any type which is openable and closable.

The side opening of the T H8 is connected to a return pipe 41 which is provided with a check valve it at its lower end and also a small vent hole N. This check valve I6 is connected to allow liquid to flow into the pipe 41 but not in the opposite direction.

The pump may be provided with a mounting flange or hanger 22 which may be secured to the supply pipe 2, thus providing means to mount the pump on a suitable support which is customarily provided at the source of the liquid to be pumped. For example, the hanger 22 may rest on the cover stone of a water well. The supply pipe 2 may be made of any desirable length within the limits of pumping and, of course, the intake 3 of the supply pipe and the lower end of return pipe 4"! must extend to below the surface of the water in the well or other source of liquid that is to be pumped.

The operation of the pump is as follows: It may be assumed, for purposes of description, that water is to be pumped from a well, although it will be understood that the pump is not limited to this use, it being understood that the pump will have utility in pumping other liquids under various conditions where there is a source of liquid to be pumped. It may be assumed further that the pump is mounted in a water well with the hanger 22 resting on the well cover at the top of the well and the intake of the supply pipe 2 and the lower end of the return pipe 41 is beneath the surface of the water.

To prime the pump, the discharge valve 2| is closed and the valve |5, vent and vent 25 are opened. The pump handle 26 is raised to its uppermost point. As shown in Fig. 2, the handle and pump rod are in their uppermost position or at the end of the up stroke. When the pump handle is in this position, vent 25 and vent 2B are closed when the boot 8 is in its fully expanded position. The pump handle 26 is then moved down and this pulls down plunger 9. This causes the flexible boot to collapse, thus reducing the interior space within the boot. Air can not enter the supply pipe through valve 2| or vent cock 25 because they are closed, nor can air enter the supply pipe through check valve l4 because it is connected to allow fluid to flow outwardly only. Hence the water enters the supply pipe either through intake 3 or check valve 16. When the boot is collapsed as much as it can be, that is, when the plunger reaches its full stroke in the down direction, the plunger is then raised to its upper limit to the end of the up stroke. Reciprocation of the handle, and in turn the pump rod l3 and plunger 9, is continued until water is raised out of the open valve I5. When this is observed the pump is primed. After the pump is primed, valve I5 is closed and valve 2| is opened. Upon continued reciprocation of the plunger, the Water is forced out of the supply pipe 2 through check valve 4 and valve 2|.

In order to facilitate the work of pumping, the atmosphere within the chamber l9, that is, within the space 44, may be made non-communicating with the atmosphere. Valve 20 is closed when the plunger is at its upper limit. When the boot 8 is collapsed by bringing the plunger 9 to the end of its down stroke, the atmosphere within the airtight chamber I9, that is, in the space 44, is rarified to the extent that the space 45 within the boot and within the tube II is reduced. Hence, the resistance to the return of the plunger 9 on its up stroke is correspondingly reduced. The load or weight of the plunger materially aids in the down stroke. The plunger is preferably made of sufficient Weight to produce the down stroke and it is automatically arrested when the back pressure is equal to the pressure caused by the weight of the plunger, so that the work put into the pump is done only on the up stroke and the work done on the up stroke is reduced by virtue of the rariflcation of the atmosphere in space 44 as above indicated.

While I have described a preferred embodiment of my invention and have described it in connection with the pumping of water, it will be understood that my invention may be embodied in pumps for pumping other liquids, and if desired, mechanical means may be used to reciprocate the pump rod. Accordingly, it will be understood that various modifications may be made by those skilled in the art without departing from the spirit of my invention, the scope of which, it is to be understood, is comprehended by the appended claims.

What is claimed is:

1. A pump for pumping liquids which comprises a supply pipe, the lower end of which extends below the surface of the liquid to be pumped, a check valve connected to said lower end of the supply pipe providing an intake, a flexible and collapsible boot connected at its lower end to the upper end of said supply pipe, a plunger having an opening inserted in the upper end of said boot, a flexible tube connected to said plunger with its interior connected to the interior of said boot, a return pipe connected at one end to said tube, a check valve at the opposite end of said return pipe which extends below the surface of the liquid to be pumped, a. valve connected to said return pipe to open and close the interior of said return pipe to the atmosphere, a check valve between said last mentioned valve and said flexible tube, a discharge conduit connected to said supply pipe between said boot and intake, a check valve in said conduit, a valve to open and close said discharge conduit and a reciprocable pump rod connected to said plunger to reciprocate the plunger and to move said boot to collapsed and uncollapsed position.

2. A pump for pumping liquids which comprises a supply pipe, the lower end of which extends below the surface of the liquid to be pumped, a check valve connected to said lower end of the supply pipe providing an intake, a collapsible boot connected at its lower end to the upper end of said supply pipe, a plunger having a passageway therethrough inserted in the upper end of said boot, a flexible tube connected to said plunger with its interior connected to the interior of said boot through said passageway, a return pipe connected at one end to said tube, a check valve at the opposite end of said return pipe which extends below the surface of the liquid to be pumped, a valve connected to said return pipe to open and close the interior of said return pipe to the atmosphere, at check valve between said last mentioned valve and said return pipe, a discharge conduit connected to said supply pipe between said boot and intake, a check valve in said discharge conduit, a valve to open and close said discharge conduit, a reciprocal pump rod connected at its upper end to said plunger to reciprocate the plunger and to move said boot to collapsed and uncollapsed position, and a packing gland in the lower end of said supply pipe through which said pump rod reciprocates.

3. A pump for pumping liquids which comprises a supply pipe, the lower end of which extends below the surface of the liquid to be pumped, a check valve connected to said lower end of the supply pipe providing an intake, a collapsible boot connected at its lower end to the upper end of said supply pipe, a plunger having a passageway therethrough inserted in the upper end of said boot, a flexible tube connected to said plunger with its interior connected to the interior of said lboot through said passageway, a return pipe connected at one end to said tube, a check valve at the opposite end of said return pipe which extends below the surface of the liquid to be pumped, a valve connected to said return pipe to open and close the interior of said return pipe to the atmosphere, a check valve between said last mentioned valve and said return pipe, a discharge conduit connected to said supply pipe between said boot and intake, a check valve in said discharge conduit, a valve to open and close said discharge conduit, a reciprocal pump rod connected at its upper end to said plunger to reciprocate the plunger and to move said boot to collapsed and uncollapsed position, a packing gland in the lower end of said supply pipe through which said pump rod reciprocates, and an airtight cylinder enclosing said tube and boot and means to vent said cylinder.

4. A pump for pumping liquids which comprises a supply pipe, the lower end of which extends below the surface of the liquid to be pumped, a check valve connected to said lower end of the supply pipe providing an intake, a collapsible boot connected at its lower end to the upper end of said supply pipe, a plunger having a passageway therethrough inserted in the upper end of said boot, a flexible tube of smaller crosssection than said boot and of a length to permit collapsing of said boot, said tube being connected at its lower end to said plunger with its interior connected to the interior of said boot through said passageway, a return pipe connected at its upper end to said tube, a check valve at the opposite end of said return pipe which extends below the surface of the liquid to be pumped, an openable and closable valve connected to said return pipe to open and close the interior of said return pipe to the atmosphere, a check valve between said last mentioned valve and said supply pipe, a discharge conduit connected to said supply' pipe between said boot and intake, a check :valve in said discharge conduit, a valve to open and close said discharge conduit, a packing gland in the lower end of said supply pipe, and a reciprocal pump rod passing through said packing gland and connected to said plunger to reciprocate the plunger and to move said boot to collapsed and uncollapsed position.

5. A pump for pumping liquids which comprises a supply pipe, the lower end of which extends below the surface of the liquid to be pumped, a check valve connected to said lower end of the supply pipe providing an intake, a collapsible boot connected at its lower end to the upper end of said supply pipe, a plunger having a passageway therethrough inserted in the upper end of said boot, a flexible tube of smaller crosssection than said boot connected to said plunger with its interior connected to the interior of said boot through said passageway, a housing surrounding said boot and tube and having an openable and closable vent whereby to make the interior of said housing non-communicating with the atmosphere, a return pipe connected at one end to the upper end of said tube, a check valve at the opposite end of said return pipe which extends below the surface of the liquid to be pumped, a check valve connected at the upper end of said supply pipe above said return pipe and a valve above said last mentioned check valve to open and close communication between the atmosphere and said supply pipe, a discharge conduit connected to said supply pipe between said boot and intake, a check valve in said discharge conduit, a Valve to open and close said discharge conduit and a reciprocal piunp rod connected to said plunger to reciprocate the plunger and to move said boot to collapsed and uncollapsed position.

6. A pump for pumping liquids which comprises a supply pipe, the lower end of which extends below the surface of the liquid to be pumped, a check valve connected to said lower end of the supply pipe providing an intake, a flexible and collapsible boot connected at its lower end to the upper end of said supply pipe, a vent cock in said supply pipe below said boot, a plunger having a passageway therethrough inserted in the upper end of said boot, a flexible tu be longer than said :boot and of smaller cross-section connected to said plunger with its interior connected to the interior of said boot through said passageway, an air cylinder surrounding said boot and tube and having an openalble and closable vent whereby to make the interior of said chamber non-communicating with the atmosphere, a return pipe connected at its upper end to said tube, a check valve at the opposite end of said return pipe which extends below the surface of the liquid to be pumped, a vent in said return pipe adjacent said last mentioned check valve, a check valve above said cylinder and return pipe to provide communication between the atmosphere and said return pipe and supply pipe, an openable and closable valve above said check valve and communicating with the interior of said last mentioned check valve to close the interior of said return pipe and supply pipe to the atmosphere, a discharge conduit connected to said supply pipe between said boot and intake, a valve to open and close said discharge conduit, a check valve between said supply pipe and last mentioned valve, and a reciprocal pump r-od connected to said plunger to reciprocate the plunger and to move said boot to collapsed and uncollapsed position.

SIMON JONATHAN GEORGE MARCH.

No references cited,

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