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Publication numberUS13559 A
Publication typeGrant
Publication dateSep 11, 1855
Publication numberUS 13559 A, US 13559A, US-A-13559, US13559 A, US13559A
InventorsJ. De Yampert
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Double-acting force-pump
US 13559 A
Abstract  available in
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Description  (OCR text may contain errors)




To aZZ whom z5 may concern Be it known that I, THOMAS J. DE YAM- rERT, of the city and county of Mobile and State of Alabama, have invented certain new and useful Improvements in Double- Action Force-Pumps; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure l represents a vertical section in the line l, 2 and Fig. 2 a vertical section in the line 3, 4.

The letters of reference indicate the same parts in the different figures.

The nature of my invention consists in constructing and arranging the various parts of a double action force pump as hereinafter fully described by which means I am enabled to increase the effect of the pump without increasing the length of the stroke or area of the plungers.

The following is a description of the construction and operation of my improvement.

A, is a water tight chamber of the shape represented in the drawing, or of any other convenient form. It communicates with a vertical cylinder (B) placed below it, and with another of the same dimensions above (C). The axes of B and C are in the same vertical plane. Above the cylinder C is an air chamber or receiver D, from which proceeds the ejection pipe E. The cylinder B, is secured to a suitable platform and communicates with a reservoir or other source of supply by means of an induction pipe F, furnished with a valve (a). An induction pipe having a valve (b) leads from the reservoir to the upper part of the cylinder Each cylinder is furnished'with a solid plunger (c, and d). C has a piston rod (g) attached, which passes upward through the bottom of the air chamber D, and through a stufling boX in the top of the same, where it is pivoted to the end of the lever or brake H which has its fulcrum at I. There is an opening (f) between the cylinder C, and receiver D closed by a valve (6,). The chamber A, has an induction pipe K, communicating with the reservoir, and closed by the valve ZL, and an ejection pipe (L) closed by a valve The cylinder B, has also an ejection pipe (M) leading to the receiver D, and furnished with a valve Zr. A pivot (N) passing transversely through the center of the chamber A, serves as the common fulcrum for the crossed levers O and I). To the extremities of these levers are jointed four connecting rods Z, Z, and m, m one pair of these rods Z, Z, is pivoted to the under side of the plunger c, at n, and the (tther m, m, to the upper side of the plunger The pump constructed, and arranged as above and in the position shown in Fig. l, the chamber, cylinders and pipes filled with water is put in operation by depressing the outer end of the lever I-I. This elevates the plunger c, which by drawing on the rods Z, Z, brings the upper, and lower extremities of the levers O, and P, toward each other, causing the connecting rods m, m, to force the plunger (Z downward, thus forcing the contents of the cylinders into the receiver D, through their respective ejection passages before described. In the mean time the above motion of the plungers creates a partial vacuum in the chamber A, which is filled by water from the reservoir, through the induction pipe K. Upon elevating the lever H the two plungers again approach each other forcing the contents of thecylinders into t-he chamber A, and thence through the pipe L into the receiver D, the two cylinders B and C being at the same time i'illed by means of their respective induction pipes.

The water which passes into the receiver D is ejected through the pipe E when the pump is in operation, the elasticity of the air in the upper part thereof causing the water to issue in a steady and unbroken stream in the usual manner.

This pump possesses great power and steadiness of action combined with facility of operation.

By my peculiar arrangement as shown in the present instance, I can, with a stroke of one inch, produce an effect equal to that produced by a stroke of fourrinches in a common pump with a plunger of the same area; while this proportion can be increased (within convenient limits) by adding more cylinders radiating from the center of the chamber A, and connected with the crossed levers by suitable connecting rods.

sire to secure by Letters Patent is,-

in 5 opterated in the intermediate or central chamber A, and When combined With two radiate from the Central axis or fulcrum of said levers, substantially in the manner, and for the purposes herein set forth.


What I claim as my invention and de- The system of crossed levers, and connect- 0' rods herein described, when placed and VVit-nesses:


more pistons, Working in cylinders which S. W. FoRREsT.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5252045 *Apr 26, 1991Oct 12, 1993Toyo Engineering CorporationDual piston reciprocating vacuum pump
Cooperative ClassificationF16H21/04