US1016070A - Press. - Google Patents

Description

E. HONEGGER.

PRESS.

APPLICATION FILED 001. 2,

Patented Jan. 30, 1912.

2 SHEETS-SHEET 1.

E. HONEGGER.

PRESS, APPLIOATION TILED 00'1.2, 1909.

Patented J an. 30, 1912.

2 SHEETS-SHEET 2.

UNITED STA11$ S PATENT OFFICE.

EMIL HONEGGER, OF OERLIKON, SWITZERLAND, ASSIGNOR TO MASCI-IINENFABRIK OERLIKON, F OERLIKON, SWITZERLAND.

PRESS.

Specification of Letters Patent.

Patented Jan. 30,1912.

To all whom it may concern:

Be it known that I, EMIL HONEGGER, a citizen of Switzerland, residing at Oerlikon, Switzerland, have invented new and useful Improvements in Presses, of which the following is a specification.

This invention relates to a hydraulic press for riveting, punching, stamping and the like, which according to the known arrangement, has between the press cylinder, pump, and reservoir, a system of pipes com letely filled with water, and has for its ob ect to provide a float in the reservoir enabling the use of the press in any position.

In the accompanying two sheets of drawingsFigure 1 is an elevation, and Fig. 2 a plan of an electro-hydraulic press to which my invention is applied, while Figs. 3, 4 and 5 are diagrams showing the flow of the liquid and the subject of my invention more particularly.

Similar letters refer to similar parts throughout the several views.

In carrying out my invention and referring t0 the Figs. 1 and 2, 1 is the body of the press carrying on its lower arm the fixed tool 2 and on its upper arm the piston cylinder 3. In the latter moves the piston 4 carrying at its lower end the tool 5 moving therewith. The piston cylinder 3 is connected with a reservoir 6 closed outwardly air tight by means of a float 7.

On the top of the press body is mounted the worm gear 8 consisting of a worm coupled to the motor and a worm wheel driven by the worm which gear. by means of the piston rod 10 transmits motion from the motor 9 direct to the piston of a differential pump 11. The differential pump 11 which is of the known type and is diagrammatically shown in Figs. 3, 4 and 5, consists of two cylinders of diflerent diameters, in which works a ram 28 having two diameters corresponding with those of the cylinders.

' The supply and delivery pipes are connected to the larger cylinder and have respectively a suction valve and a delivery valve. The delivery pipe is also connected to the smaller cylinder.

Adjacent to the motor 9 is arranged its switch 22. The liquid conveyed by the suction pipe 13 from the reservoir 6 to the pump 11 and by the latter passed on, is distributed by a piston valve gear 12. In accordance with the position in which the valve gear lever 15 is set, the valve gear conveys the liquid coming from the pressure pipe 16 either into the pipe 17 over the piston 4 to move it downward or through the pipe 18 below to raise it again. Below the piston valve gear 12 is arranged a safety valve 14 as pressure controlling valve by means of which the piston pressure can be varied at will.

The whole of the press is suspended by means of the ring 19 and the curved arm 20 and rendered turnable around the shaft 26 by means of the hand wheel 23 having a worm 24 and the worm wheel 25. The press may however also be suspended by the ring 27 at the end of the shaft 26.

The operation of the press'is as follows The motor 9 drives the worm gear 8 and the worm wheel shaft thereof forming a crank shaft, by means of the two connecting rods moves the piston of the differential piston pump 11 upward and downward, the pump drawing the liquid from the reservoir 6.

When the pump piston 28, Figs. 3, 4 and 5, moves upward the liquid passes the suction valve 29 and when the piston then moves downward the suction valve will close and the liquid pass through the pressure valve 32, one half of the liquid being conveyed over the pump piston 28 and the other half according to the position of the valve gear lever 15 and valve 30. over or below the piston of the press.

The path of the liquid in the two end positions of the valve gear lever 15 is as follows 1. Valve gear lever in its lowermost position. Diagram Fig. 5.The pump draws the liquid from the reservoir 6, through suction valve 29 and forces it through the delivery valve 32 partly to above the pump ram and partly through the pipe 34 into the space left by the downwardly moving press piston 4. The liquid underneath the press piston 4 being thereby displaced, passes through the pipes 35 and 42 into the reservoir and from there again to the pump. Owing to the available area below the piston being smaller than that above the same, the surface of the water in the reservoir 6 will sink when the press piston descends. The float 7 being air tight will be forced to follow the surface by the atmospheric pressure acting on it. When the piston 4; descends the pipe 36 will become closed. As soon as the press piston discontinues to descend, the whole of the pipes leading from the delivery valve to the top of the cylinder are placed under pressure, hence also pipe 38, the safety valve 39 being held against its seat by a controllable spring. If the pressure of the liquid becomes greater than the pressure exerted by the spring 40, the safety valve 39 is forced open and the liquid escapes from the pipe 33 to the pipes i1 and- 42 which are in open communication with the reservoir 6.

2. VaZoe gear in its uppermost position. 1 Diagram Fig. i.The liquid circulates from i the reservoir 6 through the suction valve 29 I and pressure valve 32 partly to above the pump piston 28 and partly through pipe 33, between the valve gear pistons 30 to the; pipe 35 and below the press piston i which i is thereby moved upward and displaces the liquid above it which passes through pipes E 3st, tl and 42, into the reservoir 6. Owing to the available area above the piston being larger than that below the same, the surface of the water in the reservoir will rise when the press piston ascends. The float 7 will j be forced outward by the liquid. The 1 safety valve acts in the manner described 5 under position 1.

"Copies of this patent may be obtained for five cents Circulation of liquid. Diagram Fig. When the press piston has reached its highest position it will open the pipe 36. The liquid will now circulate from pipe 36 35 pass through suction and pressure valve to pipe 33 between the valve gear pistons 30 to pipe 35 below the press piston at and back to pipe 36. The pump therefore causes the liquid to continuously circulate when the 40 valve gear lever and valve gear piston are in their highest position until the said lever and piston are brought into their lowest position again, when the liquid will circulate again as described in reference to Fig. 3. 5

I claim:

In a portable hydraulic press for riveting, punching, stamping and the like, the combination of a cylinder, plunger, pump, reservoir, and system of connecting pipes adapted to be kept filled with liquid, with an air tight float in said reservoir subject to atmospheric pressure and acting as and for the purpose set forth.

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

EMIL HONEGGER.

Vitnesses CARL GUBLnn, EMIL CONRAD Rnonvonn.

each, by addressing the Commissioner of Patents,

Washington, D. G.

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