US2031535A - Ram - Google Patents

Description

` E. KlEcKsEE RAM Mbo m m6.

Patented Feb. 18, 1936 PATENT GFFICE RAM Ernst Kiecksee, Leipzig, Germany,

assignor, by

mesne assignments, to YMeco-Brennkraft-Maschinen G. m. b. H.,

Germany Application August 17 tIn l'Germany 12 Claims.

The present invention relates to van internal combustion ram i. e., a ram in which a cylinder movable relativelyto a piston constitutes the ram block and in which the lcylinder `is urged upwardly by the explosion of fuel in lthe cylinder and then Afalls under the action of its ownweight.

According 'to `the invention a much more delicate Aand 1faci-le foon-trol of the ram is rendered `possible 'in that the fuel vis fed into the ramcylinder by means of -a pump -member which is connecedw'iiththe ram cylinder and 'is moved manually or by means of auxiliary springs. Such a pump member which can 'beconstituted by Va small piston -or conversely by "a small pump cylinder is very light landi-correspondingly responsive to lcontrol and if lthe pump member is subjected vto 'the action of a spring then the ram can operate in a completely automatic manner from the time that "it is started until it is stopped. Also in consequence of its small weight the pump member can readily be constructed for remote control. A further simplification of the manipulation is attained in the present invention in that-the'pump member is 'associated 4vwit-h an outlet for the combustion gases, the outlet being Vmanually controlled or automatically controlled from the pump member. A further Asimplification is Vattained in lthat the pump member is constructed to operate lat the same time as contact'maker for the ignition. A particularly compact and simple construction is atta-ined according to the invention in particular in that an auxiliary piston which is axially movable in the ram cylinder itself is provided las pump member and moreover vby accommodating the vaporizer inthe ram cylinder. In order that one and the same ram can rbe used 'both as stamper as well as rammer-log corresponding interchangeable -.foot pieces are provided .for attachment to the .rod of rthe working piston.

In the accompanying drawing:

Figs. 1 through 4 are longitudinal sectional views through an internal combustion ram constructed yin accordance with the invention and illustrating the various successive stages during operation thereof.

Fig. .5 is a detail view of an arrangement employed for securing a foot piece, and Y Fig. 6 is a detail view of a type of stamper foot which may be used with the device.

The ram consists of the `ram `cylinder I, the working piston 2 disposed therein and provided with piston rod 3 and a pump member 5 which in the example shown is in the form of a small Frankfort-on-the-Main,

, 1932, Serial No. 629,205 August 20, 1931 auxiliary piston arranged to be axially displaceable in the head of the cylinder of the ram.

In the embodiment according to Figs. 1-5, the Aauxiliary piston 5 is volisplaceable by means of .'a 'hand-grip 4 and a valver6 disposed on the piston 5 5 also participates in the motion of the hand-grip 4. The valve 6 is connected by a stem 6 to the rod 4 depending from the hand-grip 4. The rod 4 passes through a central aperture in the top of the ram cylinder l and is slidable ver- 1o tically with respect to the cylinder top. The stem 4' is guided in its vertical sliding movement by a spider 5 secured within the auxiliary piston 5. The spider 5 is provided with a central aperture through which the stem 4 passes.

A fuel 'vaporizer 28 is disposed in the lower part of the ram cylinder I. This vapoizer comprises a 'perforated disc or a sieve 2| from which wicks 22 hang into the liquid 23 which is to be vaporiZed. The vaporizer chamber is provided in 20 addition with an air inlet socket 24 with deilector surfaces 25 provided therein to prevent the liquid from being vthrown out on the'upward stroke of the ram cylinder I. By means of a conduit 28 containing a check valve 28 the vaporizer cham- 25 ber 20 is Aconnected with the space 1 in the cyl- 'inder head which contains the auxiliary piston 5. The conduit 28 is provided with a one-Way valve '28 near the point where it connects with the chamber 1. This valve permits fuel vapor to be 30 drawn into the chamber 1 but prohibits explosion gases from descending the conduit 28. The cylinder space 1 is connected with the main cyl- 'inder by way of an aperture 29 in a partition 29 which vseparates the two cylinder chambers from each other. A restoring spring 26 surrounds the kpiston 3. The lower end of the restoring spring 26 extends into an annular cavity 21 provided within the vaporizer chamber which enables the length of the restoring spring to be increased. If 40 the ram is to be used as a rammer-log then a foot piece 30 of the form shown in Figs. l to 4 for example is associated with the ram cylinder I and secured thereto by suitable means such as by the bolt 30.v The lower end of the piston 45 rod 3 carries a flanged collar 35. The extreme end portion of the lower end of the piston rod below the collar 35 is split. A nut 33 is secured to this end by screwing it thereon and this nut is retained in place also by a spreading screw 32. 34 is a buffer spring.

The reference numeral 36 represents a contact in the ignition circuit 31. This contact is normally closed. However, when the auxiliary piston is raised 11o its uppermost position, it is broken vso 55 as to cause the spark plug or other igniting means 38 to spark. 31 represents a battery or other source of electrical power for the ignition circuit and 38 represents the necessary spark coil. Such an ignition circuit is very common in internal combustion engine systems. l

The mode of operation ofthis form of the invention is illustrated in Figs. l to 4 which show the successive stages of operation.

The device is shown at rest in Fig. 1. To set the ram in operation the auxiliary piston 5 which in consequence of its own weight is resting on the partition 29 is raised by means of the handle 4. This stage of the operation is shown in Fig. 2. In this way vaporized fuel is drawn into' the cylinder space 1 from the vaporizer chamber 20 and simultaneously with the lifting of the auxiliary piston 5 the valve 6 is raised into the closed position. In other words, as the hand-grip 4 is raised the rod 4', the valve stem 6', and the valve 6 will also be raised. These elements are integral as described above. The rod 4 is slidable vertically with respect to' the top of the ram cylinder I and the valve stem 6' is slidable vertically in the spider 5 also as described above. As the valve 6 is raised the opening in the auxiliary piston 5 is closed thereby. Further upward movement of the hand-grip'4 results in a rising movement of the auxiliary piston 5. In its raised position the auxiliary piston 5 opens a contact 36 in the ignition circuit whereby the ignition of the fuel air mixture drawn into the space 1 is effected. Due to the explosion the ram cylinder I is thrown upwardly as shown in Fig. 3. The piston 2 and the piston rod 3, however, are arrested by the pressure due to the reaction. When the ram cylinder I is thrown upwardly the explosion gases ultimately escape through an outlet 8 provided in the cylinder I. At the same time the spring 26 is compressed and under the action of this spring the piston 2 moves upwardly relative to the ram cylinder I. Fig. 4 shows the highest position of the cylinder and the piston just before the whole device falls of its own weight so that the elements assume the positions shown in Fig. l. The workman operating the ram involuntarily moves the handle 4 downwardly following the downward motion of the cylinder I and in this way the valve 6 is allowed to open so that the combustion gases can escape through the aperture 29', past the valve 6 and through the auxiliary pisto'n 5. According to the amount by which the operator lowers the pump piston 5 before raising it again, (the lowermost position being determined by the partition 29), a greater or smaller quantity of fresh fuel is drawn into the cylinder space 'I and caused to explode and consequently the cylinder I is again urged upwardly against the action of the spring 26 and again allowed to drop and so on. The operator can regulate the weight of the blow of the ram by lowering the auxiliary piston 5 to a greater or less extent.

I n the embodiment shown in Figs. 1-4, as mentioned above a sleeve or collar 35 is provided on the end of the piston rod between the buffer spring 34 and the foot piece 3 secured to the cylinder I as described above and due to the action of this sleeve and the buffer spring 34 the impact of the foot piece 30 will initially be taken up somewhat resiliently. If on the other hand the ram is to be used as a stamper then, instead of the foot piece 30, the stamper head 3I of Fig. 6 is secured to the piston rod 3 by means of the nut 33. The stamper head is not secured to the main body of the device by any bolt such as by 30' as is the foot piece 30. The stamper head 3l, together with the piston rod 3 and the working piston 2, remains at rest during the upward and downward motion of the ram cylinder. Each time the ram cylinder drops the lower end thereof impacts against the stamper head 3I.

What I claim is:

l. In a portable manually operated internal combustion ram hand tool, a ram body having a cylinder therein, a working piston in said cylinder, said ram body and piston being mounted for relative movement in a direction axially of the cylinder, said ram body having a chamber communicating with said cylinder, a fuel feeding piston movable in said chamber, said ram body having a vapo'rizing chamber therein for holding liquid fuel communicating with said first chamber, said vaporizing chamber being located below said cylinder, said ram body having an annular chamber within said vaporizer chamber, a piston rod connected to said first piston and extending through said annular chamber, and a coil spring around said piston rod normally urging said piston into' said cylinder, said spring extending into said annular chamber.

2. In a portable manually operated internal combustion ram hand tool, a ram body having a cylinder like portion therein, a working piston in said cylinder like portion, said ram body and piston being mounted for relative movement in a direction axially of the cylinder like portion, a second cylinder like portion rigid with said first portion and having its axis parallel to the axis of said first portion and in communication therewith, a feeding piston manually movable in said second cylinder like portion axially thereof relative to said ram body, and a handle disposed above said ram body for holding and operating the device, said handle being connected to said feeding piston for operating the same.

3. In a ram as claimed in claim 2, means controlled by movement of the feeding piston to ignite the fuel.

4. In a ram as claimed in claim 2, outlet means in said feeding piston to permit the escape of combustion gases.

5. In a ram as claimed in claim 2, outlet means in said feeding piston to permit the escape of combustion gases, and valve means on said feeding piston to control said outlet means.

6. In a ram as claimed in claim 2, outlet means in said feeding piston to permit the escape of combustion gases, valve means on said feeding piston to control said outlet means, and common manual means for moving said feeding piston and valve means.

'7. In a ram as claimed in claim 2, said ram body also having a vaporizing chamber therein for holding liquid fuel and means to conduct fuel from said chamber to said second cylinder like portion.

8. In a ram as claimed in claim 2, said ram body also having a vaporizing chamber therein for holding liquid fuel and means to conduct fuel from said chamber to said second cylinder like portion, said vaporizing chamber being located below said first cylinder like portion, said ram body having an annular chamber Within said vaporizer chamber, a piston rod connected to said rst piston and extending through said annular chamber, and a coil spring around said piston rod normally urging said piston into said cylinder, said spring extending into said annular chamber.

9. In a portable manually controllable internal combustion ram hand tool, a ram body having a cylinder therein, a working piston in said cylinder, said ram body being mounted for movement in a direction axially of the cylinder when placed in normal work position, said ram body having a chamber communicating with said cylinder and rigid therewith, a partition between :said cylinder and said chamber having a central opening therein, a fuel feeding piston movable in said chamber in a direction parallel to the axis of said cylinder, and a handle disposed above said ram body connected to said piston.

10. In a ram as claimed in claim 9, outlet means in said feeding piston to permit the escape of combustion gases and valve means to control said outlet means.

l1. In a portable manually operated internal Y combustion ram hand tool having an explosion chamber, a fuel chamber below said explosion chamber, and means for conducting fuel from said fuel chamber to said explosion chamber, a piston slidable in said explosion chamber, a piston rod connected to said piston and extending downwardly through said fuel chamber, said ram having an annular chamber Within said fuel chamber, and a coil spring around said piston rod normally urging said piston into said explosion chamber, said spring extending into said annular chamber, a handle disposed above the device, and means connected to said handle for operating said first named means.

l2. In a portable manually controllable internal combustion ram hand tool, a ram body having a cylinder therein, a working piston in said cylinder, said ram body and piston being mounted for relative movement in a direction axially of the cylinder, said ram body also having a combustion space therein coaxial with said cylinder and communicating therewith, a partition between said cylinder and said chamber having a central opening therein, a feeding piston movable in said combustion space axially of the cylinder to feed fuel to said combustion space,

and a handle disposed above said ram body for l holding and operating the device, said handle being connected to said feeding piston.

ERNST KIECKSEE.

Images