US2054851A - Power ram - Google Patents

Description

p -22,1936. R. DORNFELD ET AL 2,054,851

POWER RAM Filed NOV. 14, 1934 Patented Sept. 22, 1936 PATENT OFFICE POWER RAM Reinhold llornfeld and Konrad Haage, Esslingen-on-the-Neckar, Germany Application November 14, 1934, Serial No. 753,018 7 j I In Germany December 5, 1933 Claims.

Our invention relates to rams and more especially to a power ram controlled by hand. It is an object of our invention to provide a ram of this kind which is more efficient than similar devices hitherto suggested.

being shifted after each'blo-w.

In rams exclusively operated by hand this does not offer any difficulty. If such rams are operated by power in orderto render them more efficient and to save labour, the controlling and shifting of the ram is still rendered possible as long as the weight and dimensions of the rams remain below a certain limit. However in such cases the possibilities of power operation cannot be utilized to the full extent. The demand for guidability of the ram must necessarily interfere with the high weight and large size of the ram so that heavy blows over an extended area cannot be realized any more.

The present invention is designed to overcome these difficulties by offering means for increasing the weight and the area covered by the ram without the handling and more especially the guiding of the ram being thereby rendered difficult. This is obtained according to this invention by making the ram very large and low, whereby its centre of gravity is lowered, and combining it with -a separate stamping member, the axis of the power cylinder of the ram being however inclined to the striking surface of this member. Consequently, if the ram is lifted off the ground, it rises not at right angles to the stamping surface, but at a pointed angle thereto, and in consequence thereof the centre of gravity of the ram will move onwards from the initial position and during the free flight and following free fall will drop down onto another area of the ground surface than that from which it has been just raised. Such a ram can be directed by means of rods or shafts extending to the rear of the ram and which enable the workman to turn the ram, preferably during the free flight, in such manner, that the progress of the ram after each blow takes place in the desired direction.

In the drawing affixed to this specification and forming part thereof a ram embodying our invention is illustrated diagrammatically by way of example.

In the drawing,

Fig. 1 is a side elevation of the ram at rest on the ground;

Fig. 2 is a vertical axial section showing the power system of the ram during the first lifting phase, and

Fig. 3 is an elevation illustrating the ram at the highest point of its flight, the path described by the ram during the flight being indicated by dash lines.

Fig. 4 is a plan view corresponding to Fig. 1.

Referring to the drawing, the ram here shown is of the kind, in which the working cylinder a of a power engine is formed as part of the heavy surrounding main body I), while the-working piston c, when at rest, is shown resting on the surface ofthe ground to be acted upon by means of the foot d, so that the gas pressure developed in the working cylinder at by means of compressed air or by the explosion of a mixture of air and fuel causes the cylinder and the structure fixed to it to be lifted, while the piston is prevented from rising. However after the exhaust has taken place a spring 6 or the like causes the piston and the member (1 to follow or imitate the ascent of the cylinder and main body of the ram structure and, after the free flight of the whole system has come to an end, to drop again. The cylinder and ram structure connected with it are guided in a rod ,1 mounted on the ram foot or block d, which is fashioned to be broad, deep and heavy. A cavity g in the bottom of the ram structure I) is so formed and arranged that it is enabled to accommodate the member (1 in such manner that the wall of this cavity, which exerts the blows on the foot member 01, on descending onto this foot member, will snugly apply itself to this latter.

According to the present invention the bottom surface of the foot member, which deals the blows, is inclined to the directionof lifting of the ram which is determined by the cylinder and piston axis.

As long as the foot member d is resting on the ground, that is as long as the portion marked 1' in Fig. 3 of the free flight of the ram is gone through, the ram structure will move upwardly in a straight line inclined relative to the ground.

. If now the pressure medium is exhausted from the cylinder a and the spring e begins to move the foot member (1 towards the lifted ram'structure, the ram as a whole first rises further through the distance marked 70 in Fig. 3 to thereafter drop freely, the path described by each point of the stamping surface being parabolic as indicated by way of example by the dash line h. The centre point of the ramming surface,

which was at first located at m, has now been shifted to n, and the ram as a Whole has thus been shifted through the desired distance without the workman governing the ram having been required to use any manual power for this advance movement.

For the purpose of controlling the ram a sys-- tem of rods 10 and a handle q is provided, which is pivoted to the ram structure by means of horizontally arranged pins 0. By means of these rods the workman is enabled to turn the ram,

preferably while it is in free flight, in such manner, that the shifting movement in the direction me-n takes place in the desired direction either forwards or sideways or forward and partly sideways. The rods p being pivoted to the ram structure, the handle q need not follow the up and down movements of the ram.

We wish it to be understood that we do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

In the claims afiixed to this specification no selection of any particular modification of the invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

We claim:

1. A power ram comprising a stamping member, a ram structure vertically movable relative to said member, and a rod fixed to said member and serving to guide the vertical movement of said ram structure, the bottom surface of said member being inclined to said rod, said ram structure being formed with a cavity arranged to exactly fit said stamping member and to be similarly inclined to said rod.

2. A power ram comprising a ram block, an

relative axial displacement, a pressure spring in said cylinder below said piston and a rod attached to and extending at a pointed angle up- ,wardly relative to the bottom of said block into said cylinder and connected to said piston.

.4. A power ram comprising a ram block, an engine arranged above said block for upward movement relative thereto, means connected with said block for guiding such engine for movement at an angle to the vertical and means arranged to force said block to follow the upward movement of said engine and to be lifted off the ground.

5. A power ram' comprising a ram block, an engine cylinder mounted above said block for reciprocatory movement towards and away from said block, a piston. arranged in said cylinder for relative axial displacement and a rod attached to and extending upwardly from said block into said cylinder and connected to said piston, said cylinder, when lowered onto said block, being seated thereon with its centre of gravity arranged eccentrically to the vertical erected on the point where said rod is attached to said block.

REINHOLD DORNFELD. KONRAD HAAGE.

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