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Publication numberUS430436 A
Publication typeGrant
Publication dateJun 17, 1890
Filing dateAug 14, 1889
Publication numberUS 430436 A, US 430436A, US-A-430436, US430436 A, US430436A
InventorsWinfield S. Richardson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 430436 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) 2 Sheets-Sheet 1.



No. 430.436. Patented June 17, 1890-.

(No Model.) 2 Sheets-Sheet 2.


No. 430,436. Patented June 17, 1890;

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SPECIFICATION forming part of Letters Patent No. 430,436, dated J' 11116 17, 1890. Application filed August 1 1889. Serial No. 320,713- (No model.)

To aZZ whom it may concern:

Be it known that I, WINFIELD S. RICHARD- SON, a citizen of the United States, and a resident of Camden, New Jersey, have invented certain Improvements in Pumps, of which the following is a specification.

The object of my invention is to impart short and powerful movementsio the plungers of a duplex pump from a single crosshead having a movement of greater extent than the movement of the plungers, but having a correspondingly less degree of power applied to it.

In the accompanying drawings, Figure l is a front elevation of a duplex pump and plunger-operating mechanism therefor in accordance with my invention. Fig. 2 is an end view of the same. Figs. 3, 4, and 5 are diagrams illustrating the action of said mechanism; and Fig. 6 is an end view of my invention as applied to a quadruplex pump for raising and forcing water from deep wells.

In Fig. 1, A represents the pump-barrel, of which a is the suction-pipe, and Z) the discharge-pipe, both of which are provided with ordinary check-valves a and 1), opening upwardly, these pipes communicating with the pump-barrel at or about the longitudinal center of the same. The barrel is of uniform bore throughout and has two plungers B B, each of which is connected bya link 01 to one arm of a lever D, hung to a frame f on the top of the pn mp-barrel, the upper end of each lever being connected by a link g to a cross head or slide F, guided on a vertical standard F, the mid-point of which is in a line drawn through the connections of the links 9 with the upper ends of the levers D, the extremes of movement being to a like extent above and below this line. The'consequence of this is that when the slide F is at one limit of its movement the plungers B of the pump are fully withdrawn, as shown in Fig. 3, while when the slide reaches the mid-position the plungers are fully projected, as in Fig. 4, and when it reaches the opposite extreme position are again fully withdrawn, as in Fig. 5, so that each back-and-forth stroke of the cross-head or slide effects two strokes of each plunger, these strokes being of course less in extent than the stroke of the slide, but being of much greater power, owing to the toggle or knee joint action of the links g, connecting the operating-levers D with the slide F.

In applying my invention to a qua-druplex pump two of the duplex-pump barrels A A forked at the lower ends, so as to be connected to the plungers of each pump-barrel, as shown in Fig. 6, for instance. In this case I prefer to use one of the pumps as an air-pump and the other as a water-pump, the pump being in this case especially adapted for raising water from deep wells and for forcing the water so raised to any desired height or for any distance, one pump A receiving air through its valved inlet-pipe a and discharging this air through the valved outlet-pipe 17 into the cased well 03, or into a tube extending down into the well, so that the air will act upon the surface of the water and cause it to rise in a pipe 3 extending to the bottom of the well and communicating at its upper end with the inletpipe Ct of the pump A, which thus acts as a forcing-pump and delivers the Water through the outlet branch 1).

Having thus described my invention, I claim and desire to secure by Letters P'atent The combination of the duplex-pump barrel and its plungers with operating mechanism for said plungers, comprising the opposite levers, the slide or cross-head, a connection between one end of each lever and its plunger, and links connecting the opposite ends of the levers to the slide or cross-head, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.




are placed side by side, and the levers D are

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4701107 *Apr 4, 1986Oct 20, 1987American Sigma, Inc.Two stage pump sampler
US6273681 *Mar 2, 2000Aug 14, 2001Advanced Technology Institute Of Commuter-Helicopter, Ltd.Rotor blade flap driving apparatus
WO1987005974A1 *Apr 2, 1987Oct 8, 1987American Sigma IncTwo stage pump sampler
Cooperative ClassificationF16H21/44