DE115426C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

M 115426 CLASS 27h.

ADOLPH BERRENBERG in LONDON. Double acting vacuum pump.

Patented in the German Empire on October 14, 1898.

The invention relates to a vacuum pump in which the double action is achieved in that the air duct brought about by the hollow bodies to be pumped out opens into the pump cylinder approximately in the middle, in such a way that the through the The pump piston itself opened and closed this line shortly before it arrived same in its border positions respectively. takes place immediately after the start of its course. For the purpose of evacuating the air located under the piston when it descends the piston is fitted with a bottom valve and a hollow piston rod, while the Dissipation of the air above the piston when it is going up in a known manner Way happens through valves in the cylinder cover.

Two pumps will expediently work in such a way that the piston of one pump is in arrived at its lowest position, remained in it for so long and with pressure against it the cylinder bottom is pressed until the piston of the other pump is at its highest Situation arrives in which this also then as long under pressure against the cylinder cover is pressed until the piston of the first pump returns to its highest position and so on. In this way, no harmful space can arise in the cylinder itself, and it is given sufficient movement time to the diluted, carry air. Here one pump controls the other automatically, so that special auxiliary machines for control, too cumbersome and uneven to achieve a very high vacuum would be, are not necessary. Both pumps can be airtight together in containers be included.

An embodiment of the invention is shown in the accompanying drawing, and although the same illustrates two similar vacuum pumps in an indicated drive connection with each other in longitudinal section.

Both pumps are of exactly the same construction and each of them consists of a pump cylinder α with the power cylinder b adjoining it at the top. The hollow pump piston c, provided with a bottom valve c ¹ , moves in the pump cylinder and is connected to the drive piston d of the power cylinder b by a hollow piston rod e with holes in its upper part.

The air line connected to the hollow body to be pumped out opens into the pump cylinder in the middle of the stroke at f . The operating force of the pump is divided by oil, which is introduced under pressure into the slide cylinder g . The same is located directly on the side of the power cylinder, is open at the top and bottom and receives the hollow ring slide h , which controls the supply of the pressure medium through the openings ii ¹ in the power cylinder.

Versin German. Jncjenieure District Association a. d. nieiiöf en Ruhr.

Claims (1)

Which the pressure medium is supplied to a common pipe k by both pumps are / incorporated in a container which is to its cover plate l ^l filled with oil and sealed airtight. The extended piston rods and the slide rods are guided through the cover plate I ¹ in an airtight manner and the raised edge of the container allows these to be placed under oil as well. A mutually dependent operation of the two pumps is now achieved in that the slide control of the one pump with the mediation of a driver arm m respectively. Lever η is caused by the piston movement of the other pump. The pumps work as follows: Assume that piston c of pump B has just returned to its lowest position and all parts are in the position shown. While the named piston c is now pressed against the cylinder base under the pressure exerted on its drive piston, the pressure medium flowing in via the drive piston d of the pump A presses it down and thus the pump piston c. Right at the beginning of this downward movement, the pump piston closes the opening of the air suction line / and the air located under the piston is now through the bottom valve c ¹ and the oil that expediently fills the hollow piston through the hollow piston rod e and through the above in The openings e ^{1 located} in the same are pressed into the power cylinder b , from which they escape together with the pressure medium contained therein through the free cylinder ^{opening f 1} into the large container /. Shortly before the pump piston c reaches its lowest position, it releases the opening / the air suction line again and the air-diluted space created behind it when the piston descends is filled with the air flowing in through the opening / from the hollow bodies to be pumped out. At the same time, the arm m attached to the upper end of the piston extension rod ο meets with its guide eye on a lower adjusting ring of the slide rod ρ and takes it downwards, so that when the pump piston c of the pump A hits the cylinder base, the reversal of the Slide h of pump B is complete. While the pump piston of the Pumpet is now being pressed under pressure against the cylinder base, the pump piston c of the same goes up as a result of the valve reversal of the pump B that has taken place. Here, after the opening / has been closed by the pump piston, the air located above the same is pressed through the valves a ¹ located in the cylinder cover into the antechamber q and from here enters the oil container /. When the pump piston reaches its highest position, it again releases the air line /, and the air in this line can also fill the lower cylinder space again; At the same time, however, by means of the lever η, it also reverses the slide h of the pump A, in that the piston rod o ¹ with its reinforcement o ² hits the fork of the lever and thereby causes the slide rod p ^{1 to} move downward. The position which the parts of the two pumps now assume would be exactly the opposite of that shown in the drawing. In this highest position and in close contact with the cylinder cover, piston c of pump B remains until the piston of pump A has completed its stroke, which has the same effect as has just been described with reference to pump B. . When it reached its highest position (as shown), it also caused the valve of pump B to be reversed through the intermediary of the driver arm m, which this time hits the upper adjusting ring of the valve rod ρ , so that its pump piston c now descends, while that of the Pump A remains in its position against the cylinder cover until this decline is completed. The pressure medium discharged from the drive cylinders into the container / can be fed back to the drive pump through pipe r. The air drawn into the container by the pumps is advantageously sucked off through a line s by means of a special air pump. Pa ten τ-An Proverbs: ι. Double-acting vacuum pump, in which the double effect is achieved in that the air suction line (f) opens approximately in the middle into the pump cylinder (a) and is closed by the pump piston (c) itself immediately after the start of each stroke and shortly before it enters the limit position is opened again, the hollow piston (c ) provided with a bottom valve (c ¹ ) having a hollow piston rod / ej serving to discharge the air, in such a way that the discharge of the air under the piston when it descends through the bottom valve (O ¹ J and the hollow piston rod and the air located above the piston when it is raised through valves (a ^l ) in the cylinder cover. The drive connection of two pumps under ι. marked type in the way, that always the piston of the one reaching the highest or lowest position Pump causes the spool to change the direction of the other pump in the same or the other way and until after it has been switched off of the stroke of the other piston remains in this position, for the purpose of the cylinder to be completely freed from air and the diluted from the hollow bodies flowing in To give air enough time to move. For this purpose ι sheet of drawings.