US43637A - Improvement in double-acting hollow-piston pumps - Google Patents

Description

Unire@ STATES l PATENT erica..

FRANCIS A. CHASE, ORJORDAN, Nnw vonk.

IMPROVEMENT IN DOUBLE-ACTING HOLLOW-PISTON PUMPS.V

Specification forming part of Letters Patent No. L13,637, dated July 2li, 1564.

To all whom t may concern-.-

Be it known that I, FRANCIS A. CHASE, of Jordan, county ot' Onondaga, and Stateot'New York, have invented a new and Improved Pump; and I do hereby declare that the following is a full, clear, and exact'description thereof, reference being hadl to the accompanying drawings, making a part of this specitication, in which- Figure l is a vertical diametrical section through my pump. Fig.2 is a horizontal section taken through the middle of the pump. Fig. 3 is a side View, a part ot' which is shown in section to expose the ports. Figs. 4 and 5 represents the double-wing supply-valve and its seats.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to certain improvements on that class of pumps having a hollow piston-rod, through which thewater is forced by the alternate reciprocating movements of the piston, as will be hereinafter described.

To enable others skilled in the art to makel and use my invention, I will describe its construction and operation.

The main portion or body of the pump con-A sists of a cylinder, A, closed at its ends by.

means of heads B B', and having passages C G' formed on one side, through which latter the water enters the cylinder A. The induction-passages C C' are separated from each other by a central partition, a, between which and the transverse division of the 'port-box D a double-wing supply-valve, E, is pivoted, as shown clearly in Figs. l and 2.' The box D is constructed with two openings or ports, b b', through it, communicating with the respective induction-passages C C', and that portion of this box which lits within said passages is ground smoothly in order to form seats for the valve E. This box DY is removable-z'. c., it is secured in position over the entrance to the passages C C' by means of screw-bolts c c, by the removal of which the box D, together with the double-wing valve E, can be taken olf and inspected. The faces of the valve E form au obtuse angle to each other, and at this angle the pin e passes through the connectionfof the two wing's and pivots them between the lugs g g which project from the transverse division of the box D, as clearly represented in Figs. 1, 4, and 1The ports b b', which coniln unicate with the ind notion-passages (l C', will be alternately opened and closed by the wings of the valve E, acting against their respective seats and working within their respective induction-passages,as will behereinafter further explained.

The piston-rod F, which is hollow, passes through the head B ofthe pumpcylinder, and has a circular disk,'G, suitably secured on its end, as shown in Figs. l and 2. The diameter ofthis disk Gis somewhat less than that ofthe cylinder within which it works, and on the face of said disk are three or more projections, k k lc, which are tapped for receiving screw-bolts jjj, that are used to secure a disk, G', corresponding in dia-meter to G, on the ends of said projections. The opposite faces of the two disks G G' should be parallel to each other, and their edges should be beveled, as represented in Fig. 1, for the purpose of receiving the beveled surfaces ot' a metallic ring-piston, J, which is introduced between the two connected plates in such manner that when the d pump is in operation this beveled ring will alternately form and close a passage above or below said piston communicatingV with the hollow piston-rod F.

The ring J is constructed so as to work tightly within the cylinder A, and the disks G G', between which this ring works, should be sufciently small to allow the water above and below them to rush between them andin-to the hollow piston-rod freely and unobstructedly at proper times.

The operation of my pump is as follows: As the piston rises the water flows in through the lower, front, or side chamber-passage, C, and fills the cylinder. As the piston decends the lower wing ofthe supply-ValveE closes., asindicated in red lines, Fig. l, opening the port of the upper passage, C', and allowing the water to iiow'in and lill said cylinder outside of the piston-rod. Simultaneously with the inlinx of water into the upper chamber-passage, O', the water that was lirst received into the cylinder A escapes between the lower plate, G', and ring J through the piston to the hollow rod F. As the piston again rises the water above it escapes through the space made between the piston or ring J and the upper disk, G, and rushes into the hollow rod F, as

before. Thus the operation continues, the waer continually passing through the piston and being supplied alternately from above and below thesarne, keeping up a constant discharge through the pipe until the motion ceases.

It will be seen that the valves, by being connected to the piston in the manner described, do not obstruct the passage-Way of the water to the hollow rod, their narrow or small legs k lc affording a free passage to the hollow rod and obviating the obstructionwhich is offered by a central winged leg, as in other pumps of this particular character.

It will also be seen that the annular piston, by being beveled at top and bottom, in connection with the beveled disks or valves, enables me to secure a tight joint between the valves and the piston at such periods as may be necessary during the operation of the pump.

I am aware that a three-chambered cylinderl is not new per se or in combination with a pump-piston. Therefore I do not claim such as my invention; but

What I do claim as my invention, and desire to secure by Letters Patent, is-

l. The arrangement consisting of the threechambered cylinder or case, hollow piston-rod, double-acting piston, and double-acting oscillating supply-valve, substantially in the man* ner and for the purpose described.

2. Connecting the piston-valves directly to the hollow pistoirrod by means of separated legs k k, substantially as described.

3. The doubled-beveled ring J, Working between two beveled disks, G G', applied to the piston-rod F, substantially as and for the purposes described..

4. The combination of the metallic wing` valve E,'doubleaoting piston-valve, ring-piston, and hollow piston-rod with a three-chan bered pump, substantially as described.

5. The detachable port-box D, valve E, and division a, in combination with side passages or ports, C C', constructed substantially as and for the purposes described.

FRANCIS A. CHA SE.

lith esses:

A. D. FOSTER, PETER M. COLE.

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