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Publication numberUS422936 A
Publication typeGrant
Publication dateMar 11, 1890
Filing dateAug 1, 1888
Publication numberUS 422936 A, US 422936A, US-A-422936, US422936 A, US422936A
InventorsB. Hanson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 422936 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) 4 I'. B. HANSON.


Patented Mar. 11, 1890n m vf,

A y mm.

...Im .n



SPECIFICATION forming part of Letters Patent N o. 422,936, dated March 11 1890.

Appiimicnlnea August 1, 188s. serial No. 231,661. (No model.) f

To o/ZZ whom t may concern.- l

4Be it known that I, FRANK. B. HANSON, a citizen of the United States, residing at New York, county and State ot NewYork, have.

` of valve located between the air-chamber and the forcing cylinder or chamber of the pump or water-raising part of the ram, the same consisting of a tube having its exit end beveled inwardly and a disk of leather or other pliable material secured at its central part at or near the exit end of the tube with its side near the periphery resting on the beveled edge of the tube. By this arrangement a very sensitive and quickacting valve is produced, responding quickly to the varia-` tions of pressures above and below it, and thereby holding a greater percentage of the Water forced through it thanvalves heretofore used in this class of water-raising devices;

but to describe my invention more particularly I will now refer to the accompanying drawings, forming part of this specification, in which-m Figure 1 is a vertical section of a hydraulic ram embodying my improvements, and Fig. 2 is a detached sectional view of the improved valve.

The ram shown in the drawings is constructed and operates in the ordinary manner. The drivingehamber a is at its lowest part, the foul or waste water entering the same through the inlet b and discharging therefrom at the escape-valve c. At the upper side of this chamber is an orifice d, covered by means of the flexible diaphragm e, which is held and rigidly clamped at its edges between the plate f and the lower side of the water-raising chamber g. The central part f of the plate f and the central part g of the lower side of the chamber g are concave iu form and provided with perforations forming a double-converted space, in which the diaphragm e is free to play.

At the inlet-oriiice 7L of the chamber g is located the foot or check'valvei'. of ordinary construction, and above the outlet-orifice j, at its upper side, is placed my new valve, the fiange of which is clamped between the top of the chamber g and the bottom flange of the air-chamber 7a. This new valve comprises the tubular portion or valvecasing Lprojecting upwardly from the flange m and beveled at its upper end inwardly, which beveled end forms the valveseat. The bridge n, extending across the tubular part Z, is provided with 'a central stem o, having a shoulder about in line with the lower inner edge of the beveled end of the tubular part Z, and on this shoulder is clamped by means of the nut p the disk q, of leather or other suitable pliable material. The valve-disk is iiat before being secured in place, and is not formed or pressed into shape to fit the beveled seat,but is caused to adapt itself thereto by its central part being forced against the shoulder of the stem 0, so that it retains its natural elasticity and bears with a uniform pressure on all parts of the seat. This valve responds instantly to slight excess of pressure below it, the valve-disk q leaving the beveled seat but a short distance, as shown at Fig. 2, to allow the uid to pass through it, and closes promptly as soon as there is an equal pressure above and below it, thus holding all, or nearly all, the fluid passed through it.

The action of the ram will. be readily understood. The drivin g-water entering and tilling the chamber d closes the escape-valve c and raises the diaphragm e up against the perforated concaved retainer g', thereby forcing the fresh water to the extent of the displacement of the diaphragm out of the chamber g, up through the valve Z q, into the airchamber 7e, from which it passes to the place of delivery through the outlet 7c. The water in the chamber a having come to a state of rest, the valve c falls, aording a passage for the escape of water from the chamber a, the diaphragm e being thereby drawn down against the lower retainer f ,as shown in the to force'water out of the chamber g as before.

Vhile the improved valve was especially designed for and is particularly adapted to retain thewater in the air-chambers of hydraulic rams, it is evident that valves constructed on this principle may be used for other Vpur- 4 poses. It is also evident that the general form of the body of the valve may be changed and the angle of the beveled seat of the valve,

which is shown in the drawings as of about forty-five degrees, may be varied to suit the requireinelntsof the case withoutI departing from` my invention.

'av-ing now described :my invention, whatl 5 claim, and desire to secure byLetters Patent, 1s-

The combination, substantially as hereinbefore set forth, of the tubular valve-casing beveled inwardly on its inner upper edge to l forma valve-seat, a valve-support within the casing, between which and the casing an opening is left on all sides, a pliable disk secured ati its center only approximately on a line with the lower edge of the beveled valve-seat and having an annular upturned or beveled Aedge conforming with the valve-seat.

`In- Witnesswhereof I have hereunto set my hand, at New York, county and State of New York, this 25th day of July,.1888.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4911613 *Oct 24, 1988Mar 27, 1990Larry A. CoxHydraulic ram-type water pump
US6669455Sep 9, 2002Dec 30, 2003Elmer Scott WelchFluid-pumping system employing air-driven pump and employing at least one pulsation dampener
US6837693Aug 6, 2003Jan 4, 2005Ashear, Ltd.Fluid-pumping system employing piston-driven pump and employing at least one pulsation dampener
US8366667Feb 11, 2010Feb 5, 2013Baxter International Inc.Flow pulsatility dampening devices
US8449500Nov 16, 2007May 28, 2013Baxter International Inc.Flow pulsatility dampening devices for closed-loop controlled infusion systems
WO2011161435A2 *Jun 17, 2011Dec 29, 2011Water Powered Technologies LimitedFluid pressure amplifier