US199380A - Improvement in force-pumps - Google Patents

Description

W. F. RA'YIVIONIDl Force-Pumps.

' No. 199,380. Patented Jan. 22,1878.

'neeb'. I HJMH A Qnvuov. E www,

Qrkrm UNITED STATES PATENT OEEICE.

WILRUR E.' RAYMOND, OE BROOKLYN, ASSICNOR To EiMsELE, CHARLES A. ALLEN, or NEW YORK, AND AUSTIN'C. FOSTER, or SENECA FALLS, y

NEW YORK.

IMPROVEMENT IN FORCEQPUMPS.

Specification forming part of Letters Patent N o. 199,380, dated January 22, 1878; application led June 25, 1877.

To all whom it may concern:

Be it known that I, WTLRUR F. RAYMOND, of Brooklyn, Kings County, in the State of New York, have invented certain new and useful Improvements relating to Pumps, of which the following is a specification:

My improvements may be applied with some success to many kinds of pumps, but I have in my experiments applied it only to portable pumps. Il believe that it will be by far the most usefulin pumps of that class.

I have succeeded in devising .an arrangement and construction wherebya strong and continuous stream is thrown with a very com pact and reliable mechanism. y

"The accompanying drawings form a part of this specication, and represent what I consider the best means of carrying out the invention. A p

Y Figure l is a central longitudinal section, and Fig. 2 is one of the details on a larger scaledetached.

Similar letters of reference indicate'like parts in all the gures. j

The barrel is marked `A. It is contracted at its lower end, forming a seat for the lower valve B, and extends a little distance below this valve-seat in a slightly -tapered extension, A', on which tapered part is fitted a short length of rubber tube, M, with a broad rubber ilange or annular rim, M', the func-A tionsv of which will presently appear.

The top of the barrel is contracted, with a packing and provisions for adjusting it. ThroughV the packing works a polished tube or hollow piston rod or plunger, D, the upper part of which is adapted to be grasped by the hand for operating it. The extreme top carries a changeable tip or nozzle, which connects with a smaller tube, D',

extending down the interior of the hollow rod.

D vto about the extent indicated. Y

This tubeD is peculiarly formed and equipped at and near its lower end. At the bottom is a contraction, D2, forming a seat for a ballvalve, C. A little above the tube is contracted suddenly in diameter, and is continued of that reduced diameter a compressing and Sufficient length to form thereby a seat, on which the loose annular piston E may freely play within certain limits. This piston E may be mainly of metal packed with a soft fibrous material, and forming a practically-tight it on its inner edge against the contracted part D3 of the tube D, and at its outer edge against the interior of the barrel A.

I can employ one or more Washers of rubber, G, fitting against slight extensions or anges D4 D", which aid in making a tight fit when the annularpiston E presses against the same.

A Series of holes, d, are made through the tube near 4the upper end of the contracted portion D3.

I form an annular water-chamber, z', around the exterior of the barrel A by inclosing it within an exterior casing, H. A series of holes,l a, near the top of the barrel, put the upper end in communication withthe annular chamber c'. f

The exterior casing'H is extended downward below the extension A'of barrel A, and adapted to receive a hose or other Suitable connection, as may be'required. Within it, alittle above the base, is a Short tapering tube, H2, supported by means of an internal flange, H, which latter is liberally perforated'with holes h, and forms the seat for the annular valve M', before referred to.

When the pump is adjusted for use, the rubber portion M forms a tight-fitting connection betweenVv the extension A' at the lower end of the barrel and the internal tube H2. l

The exterior casingH is formed with a screwcoupling, H3, which, on screwing down, forms a tight joint by the aid of a slight rubber ring, H4, applied as represented. On connecting the coupling H3,-the parts come to a tightbearing on the rubber H4 at the same moment as the tapering extension orv socket A' cornes to a tight bearing in the rubberpacked interior of the tube H2.

To allow for want of mathematical perfection in this respect, the tube H2 and the extension Al are made with only a slight taper,

Vso that by the yielding'f of the rubber Mbetween them the' l socket or extension Al may be thrust deeper down or may be arrested higher up, and still the joint be tightly maintained by the rubber M within considerable limits. 4

I provide screw-connections with other suitable couplings at the top, and at other convenient places, if desired. The exterior of the structure, being more exposed to injury from blows and otherwise than the internal parts, is liable to become bruised and defaced. n The annular chamber between the exterior casing H and the barrel A performs a double function of allowing vconsiderable indentations in the exterior casing without affecting the barrel, and also of affording aliberal water-passage for the water to reach the holes a'. v

I prefer ball-valves of rubberor other suitable material for the valves B and O, and in such case I can cage them, respectively, by extending a pin across a little above each, as represented.

I propose, in most cases, to employ an additional valve, F, in the position lrepresented,

also caged by a pin above, which serves as a check. t

Operation: The parts being applied efficiently together, and the pump lled with water, pressing down the hollow piston-rod D causes the valve B to close and the valve C to rise and receive water from the lower por- .tion ofthe barrel into the hollow piston-rod, and to be discharged through the nozzle or tip at the top. The loose piston E, during the early portion of the descending movement, rises both by the friction of its exterior against the barrel and by the pressure of the water below to the upper end of -the contracted portion D3, in which position it covers the `holes d, and constitutes for the time being an absolutely tight piston, which, as it descends, not only compresses the water in the barrel below and forces it out through' the nozzle at the top, but also draws in water into the upper part of the barrel through the holes a, which water is received freely through the annular space between the barrel and the exterior casing H by the lifting ofthe flexible flange or valve M. A t

So soon as the hollow piston-rod D has reached the lower end of its motion, andthe force of the hand at the top is applied to draw it upward again, the valve B rises. to receive water into the lower portion'of the barrel, the valve C closes the. lower endof the piston-rod, and the valve M'.y :drops onto its perforated seat, preventing any-back iiow through the holes a, and imprisoning the water in the upper part of the barrel. I 'At thesame time the annular piston E is shifted tothe. lower end of the contracted portion D3, and vexposes the holes d, through which the water in the upper part of the barrel is received freely to be discharged through the nozzle `at the top. There is thus a discharge at the top, both with the descent and with the ascent of the hollow piston-rod.

In order to maintain a continuous stream, I provide an air-'chamber by utilizing the upper portion yof the hollow piston-rod D exterior to its inclosed tube D1. Gare. must be taken that in charging the pump it be held upright, so as to retain air in the space referred to.

In pumping rapidly, or forcing the water to any considerable height through a hose coupled on the nozzle, under any conditions where the pressure in the pump is considerable, the water will rise around the lower end of the interior tube D1; but it will never rise to the top. It will always retain an annular chamber of air, which, by its elastic compressions and expansions, keeps the current of water practically uniform.

Various modifications may be made in the details. Thus, for example, I can vsolder or otherwise permanently join the upper ends of the .internal -tube H2 th the hollow pistonrod D, and thus reduce the chances of leaking the air from the air-chamber.

l I-can provide a cross-handle adapted to receive both hands, and can equip the pump with a base adapted to receive the feet of the operator. This may be desirable in some peculiar situations; but I prefer the parts Vas here specified. Y

Some of the parts may be useful without the others. t

For general miscellaneous use all the principal parts should be of brass, and as light as consistent with the proper strength.

The valve F, mounted in the hollow pistonrod D, performs the duties simply of a check- `valve, to aid theother valves in resisting a backward flow when the pump is at rest. It may be dispensed with altogether when desired.

I claim as my invention- .1. The valve G, mounted below the movable piston E, in combination with the hollow plunger D,having the holes d, and with the barrel A, having the holes a, and a suitable exterior casing, H, and valves B and M, as herein specified. v

2. The valve M', with its tubular part M, and the means for confining it between the extension Al and the tube H2, extending downward from the seat H1 h, as herein specified.

3.The combination of the screw-coupling H3 and its packing 'H4 in the exterior casing Hwith the tapering tube H2, rubber valve M M and tapering exten sion A exten ding downward from the barrel A, as and for the purposes herein specified.

4. In combination with the barrel A, ex-

terior easing H, hollow plunger D, and hol- In testimony whereof I have hereunto set low movable piston E, the delivery-valve C my hand this 19th day of June, 1877, in the belowand the cheok-valvel above said piston, presence of two subscribing witnesses.

and. carried therewith on the hollow plunger, WILBUR F. RAYMOND. and with suitable valves B and M' seated on Witnesses:

the xed parts, as and for the purposes speci- THOMAS D. STE'rsoN,

GHAs. 0. STE'rsoN.

Images