US1469689A - Hydraulic press - Google Patents

Description

Oct. 2, 1923. l 1,499,999

J. S. PRIUS HYDRAULI C PRES S original Filed Nov. 14, 1919 s'sheets-s'heet 1 J: Prius oct. 2,1923. "1,469,689

J. S. PRIUS HYDRAULIC PRESS O rignal Filed Nov, 14. 1919 5 Sheets-Sheet 2 fig. 2

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77x25 Aff/727 JOSEPH SEGIMON PRIUS, 0F BARCELONA, SPIN.

HYDRAULIC PRESS.

Application filed November 14, 1919, Serial No. 338,128.

To all whom t may concern:

Be it known that I, JOSEPH SEGIMON PRIUs, subject of the King of Spain, residing at Barcelona, in the county of Barcelona and State of Spain, have invented certain new and useful Improvements in Hydraulic Presses; and hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this'specification.

My invention yhas for its object to ensure the movements ofi the ram or movable platen or press head to be always parallel, thus doing away with or reducing the guides and other'devices so far employed for the purpose, and which made the construction of lar e presses to be very expensive. Y

o this end my invention consists in certain novel features and combination of parts which I will now proceedto briefly describe and particularly point out in the claims.

Fig. 1 is a side elevation of the press.

ig. 2 is Va vertical transverse section thru the central cylinder of the press showing a section of the valve for controlling the cylinders with a plan thereof-in 'relative position above the section.

Fig. 3 is a detail view ofone of the valves.Y

Fig. 4 is a partial side elevation showing a modification of the device, in which the rack bars are shown separated from the supports.

Fig." 5 is a sectional view showing the same arrangement as Fig. 4.

Fig. 6 is a side elevation of showin another modification.

Fig. gis a transverse sectional view of the modification shown in Fig. 6.

Fig, 8 is a side elevation showing still another 'modification ofthe device.

In the figures of the accompanying drawth'e press ,ings areshown the toothed racks (4) placed in front of and behinl,thesupport1ng standards or columns (15).-5Meshing with the toothed racks are two pinions of the same diameter (5) fastenedto the free ends of each .of the axles (7) which are mounted along eachside of the rammer or movable platen (16). 'When this platen or press head is caused to move up and down by the cylinders, al1 the pinions of the axle meshlng with the fixed racksare made to turn, and as the rotatin motion is imparted from one end to the oter, the axle and the movable platen fixed to it, are bound to descend to a levelfandy in a their movements are always parallel and the developed pressure is therefore equal at their full length, with the great advantage, that by -means of such a device, the need of guidin vthe. pistons or bot can be dispensed with altogether in .a length sufficient to keep 'a perfect equilibrium while working; and as a cpnsequence any guides or other like means may be suppressed or reduced to the size of the cylinders and their pistons may be the structure of the press can be simplified to the utmost, specially in those of large span. Consequently, provement, besides ensuring constant and perfect parallelism in all the movements of the movable platen, it results that all the presses and mostly those of large 'width between columns, can be constructed under far more economical conditions than has been heretofore possible. y

The rammer or platen (1'6) is mounted below one, two or more hydraulic cylinders (1', 2', 3) the pistons in two sections of different diameters.- .(The diameter of the upper section (2) of lar er size, is equal to the bore of the cylin er. The lower section (3) has a smaller diameter and consequently there remains a hollow space between the piston and the` wal1.of the cylinder (1) which is closed by the cylinder head (1.7) with a suitable packing. Y

This hollow space is full of water supplied from' the hydraulic main, by means of a. pipe (8) connected directly to the main or through a valve gear, thus giving rise to an upward pressure for the return stroke of the whole system of pistons and rammer or platen, when the upper part of the cylinders remains without pressure and the outlet or the movable platen by the described *iin-v horizontal position, so that their minimumf.

just long enough for the stroke, and..

of which are turned in Figure 3 of the drawings, are distin-.

guished by their quick working simply through a kind of lever switch. rlhe valve disk (11) opens or closes the hydraulic supply, when it is moved up and down by means of a vertical spindle (19) placed below. Each valve is combinedv with another, y

both constituting one pair (20) the arrangement being such that the spindle of one of them is coupled to an end of a two armed lever (21) and the other to the opposite end of same. rlhis lever swings in either direction around an axle in its centre, by means of another lever (10) coupled to said axle. In such a'manner, when one of the two spindles is thrust upwards by one of the ends of the lever (21), the other is pulled down by the opposite end of same, thus opening and closing the respectivevalves of the pair. One of these two valves connects one cylinder or group of them, to the hydraulic main, and the other connects them tothe water tankf B Swingin the lever (10)in one direction, tlie hydiau ic inlet to the cylinder is opened and the outlet closed, so that the ccylinder pistons with the movable platen are caused to descend. B55 turning the said lever in the opposite direction, the Jhydraulic main inlet to the cylinders is closed Ivand 'the outlet for the water opened, so that the cylinder pistons with the movable platen are caused to return upwards through the counter-pressure of the hollow spaces (1) off-the cylinders. By, placing the lever in the centre, both valves of the pair are closed so that the cylinder pistons remain stationary on account of the outlet of water being closed.

It isobvipus that the principle of my invention 'may be modified in many ways, for instance, the toothed rackspinstead of being fitted to the supporting pillars, might be mounted, in a vertical position extending downwardly and secured to the top traverse and the axles with their pinions, on the press head or platen, so that by the meshing ofthe toothed racks with the pinions of the axle, the result-would be quite the same (see Figures 4 and 5). Neither would the efliciency of the invention be affected if the toothed racks, instead of. being rstationary (since they are fitted to rigid parts of the press), and the axles with their pinions movable ,(on account lof their being Leccese mounted on movable parts of the press),u

pinions underneath the cross beam of the frame. In this manner, when the rammer moves up and down, the toothed racks partake of the same motion, and as they engage with'the p-inions fastened at the ends and along the stationary axles, they are bound to move uniformly and the rammer or movable platen is therefore caused to also move evenly. rlhe same result would be attained if all the axles were omitted and all the toothed racks verticgally mounted on the rammer were t'o be connected with each other, through some intermediate pinions or toothed wheels fitted along the top beam of the frame or any other rigid part of the press, where this purpose could be attained. (SeeUFigure 8 of the drawing).

'A three cylinder press is shown in the annexed drawing; the cylinders of. both sides forming a group, and that of the centre independently, are connected to the system of valve gear. The pair of valves on the right hand side corresponds to the centre cylinder, and that on the left to the group of cylinders of both sides. 0f the three cylinders, the centre one is made with the piston turned in two sections for the -water tank.

Having now particularly described and lascertained the nature of my-invention and in what manner the same is to be operated,

-what 1 claim as new and ofmy own invention is 1. ln a hydraulic press, the combination of a frame, a plurality of cylinders mounted thereon, pistons movably mounted in the cylinders, a platen slidably mounted in the frame and connected with the pistons, stationary members 'and connected rotatable members, adapted to engage the stationary members, one set of said members being mounted on the frame and the other set of members on the platen and movable therewith.

2. In a hydraulic press, the combination of a frame, a plurality of cylinders mounted thereon, pistons movably mounted in the cylinders, a platen slidably mounted in the frame and connected with the pistons, toothed bars, and connected rotatable gears adapted to engage the toothed bars, said bars and gears being mounted so that one vec 1,469,689 A si is secured to the platen and the other to the frame. l

3. In a hydraulicU press, the combination of a frame, a plurality of cylinders mounted thereon, pistons movably mounted in the cylinders, a platen mounted on the pistons and slidable in the frame, shafts rotatably mounted on the platen, gears mounted on the shafts adapted to rotate therewith and rack bars mounted on the frame and in toothed engagement with said gears, whereby the gears being mounted to turn with the shafts and engaging the racks, will cause the platen to'have an even movement in all points thereof.

In testimony whereof he has signed his name to this specification in the presence of two subscribing witnesses.

JOSEPH SEGIMON PRIUS.

Witnesses: FERNANDO PERMIO,

DENERI T. DRUEM.

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