US1476600A - Pump - Google Patents

Description

W. DICKENS Dec. 4, 1923.

PUMP

Filed Sept.'25 1920 mmvrax.

TGRNEY.

Patented Dec. 4, 1923.

elQl N-IITl2.-D STATES 1,476,609 PATENT ()F'F'EQE;.;

WILLIAM DICKENS, or PHILADELPHIA, PENNSYLVANIA; EoB'EErDIcKENs, ADMIN- ISTRATOR or SAID'WILLIAM DIcxENs, DECEASED, AssIGNoR oE'ONE IH'IRD T MAMIE A. BARNES AND ONETEIRD T0 EDWARD BARNES, BOTH or PHILADEL- 'PHIA, ,PENNSYLVANIA.

PUMP? Application filed September 25, 1920. Serial No. 412,674.

The invention comprehends among other features a pump of a simple construction and which is substantially of a duplex nature in that a plurality of pistons are employed on a single rod or shaft in a cylin- 20 der, to compress and force air outwardly through a nozzle.

In the further disclosure of the invention reference is to be had to the accompanying drawings, constituting a part of 25 this specification, in which similar characters of reference denote corresponding parts in all the views, and in which,

Figure 1 is an elevation of the pump;

Figure 2 is a vertical sectional view taken through the pump, and

Figure 3 is a horizontal sectional view taken on the lines 3-3 in Figure 2.

Referring more particularly to the View I provide a cylinder seated in a suitable base 11 with an auxiliary cylinder or tube 12 extending upwardly from the base adjacent to the cylinder 10, the lower end of the tube being seated in an oflset portion 13 of the base with a cross passage 14 connecting the interior of the cylinder 10 at its lower end with the tube 12. The upper end of the tube extends into a block 15 rigidly secured to the cylinder 10 by an encircling band 16 and the block 15 carries a nozzle 17 which may be in the nature of a pipe for the attachment of a flexible tube or hose 18 thereto, the block 15 having a passage 19 communicating with the tube 12 and the nozzle 17 r A piston rod 20 having at its upper end a cross handle 21, is mounted to reciprocate in the cylinder and is guided by a cap 22 through which the said piston rod loosely extends, said cap being threaded on to the upper end of the cylinder to close the same. The cylinder is preferably provided with an inlet opening 23 near its upper end and the piston rod 20 carries a plurality of pistons 24:, one of which near the lower end of the stem is termed the lower piston, and the other of which is termed the upper piston, the latter being situated about onehalf way up the piston rod, and secured in position by an encircling tube 25 arranged to encircle the lower part of the piston rod and interpose between the two pistons, serving as a spacing and securing member therefor. The pistons may be of any desired construction and it will be seen that when the stem is moved into its uppermost position, its upward movement will be limited by its upper piston striking the cap 22 and at this time the lower piston, in its uppermost position will be disposed slightly lower than the nozzle 17 and which through the medium of a cross passage 26 has connnunication with the interior of the cylinder at this point. The cylinder 10 is divided by a partition or disk 30, and an air entrance is provided at 31 for the lower portion. It will be apparent that when the stem is moved upwardly, the air above the upper piston will pass out through the bleed opening 23, while the air intervening the pistons 24 will be forced through the nozzle 17 and tube or hose 18. Now when the piston rod 20 is pushed downwardly the air admitted by the opening 23 will be compressed by the descending upper piston and forced out through the nozzle 17 by way of the pas sage 26, and at the same time the air compressed by the descent of the lower piston will be forced into the passage 14 and thence up through the tube 12 and out through a the nozzle 17. 1

WVith this arrangement it will be seen that a substantially double acting pump is provided which although compressing air when the-cylinder is operated in one direction only, is of a duplex nature by reason of the provision of the two pistons, and thus with such a structure the plurality of the pistons will co-act to compress a large quantity of air and force it through the nozzle 17.

l Vith this arrangement furthermore, theusual leathers 27 which act as washers do 7 not wear out as quickly as the structure for each piston is about onehalf of the ordinary structure of a piston of the type now generally used, the compression of the air be ing distributed between the two pistons thus 5 preventing the parts from quickly Wearing out.

Having described my invention, I claim- A pump comprising a cylinder, a trans verse partition therein, a separate piston in each section or". said cylinder, a single piston rodcarrying both of said pistons, a nozzle, and means for conducting air from both sections of said cylinder to said nozzle simultaneously.

In testimony whereof I afiix my signature.

WI LIAM "DICKENS.

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