Traveling motor compressor

March 16, 1937.

2,074,293

J. WOHLMEYER

TRAVELING MOTOR COMPRESSOR

Filed May 2, 1934

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Patented Mar. 16, 1937

2,074,293

UNITED STATES PATENT OFFICE

2,074,293 TRAVELING MOTOR COMPRESSOR Josef Wohlmeyer, Vienna, Austria Application May 2, 1934, Serial No. 723,593 In Austria December 2,1933

Claims.

This invention relates to a new and improved motor compressor of the type driven by an internal combustion engine and adapted to travel as an independent unit, and has for its object 5 to effect a very considerable saving of weight in the construction of such traveling motor compressors.

In order to enable traveling or portable motor compressors, and more particularly the road10 traveling type, to be built with light weight it has hitherto been proposed to raise the speed at which the same works, and to provide a single crank shaft common to both engine and compressor.

A further reduction in weight has also been achieved in the designing of machines of this type by using the air receiver as a base on which to mount both the engine and the compressor, the engine being arranged with its crank-shaft ₂₀ parallel to the longitudinal axis of the air receiver cylinder.

In the known types of construction the arrangement is such that the longitudinal axis of the air receiver cylinder lies in the direction of 2g travel of the unit, so that the axles of the road wheels are at right angles thereto, and skids or runners, if such be employed, are disposed parallel thereto. In either case special outriggers or brackets must be provided for the trunnions of ₃₀ the road wheels or for the skids.

In accordance with the present invention the compressed air receiver is disposed with its longitudinal axis at right angles to the direction of travel, so that it is adapted to serve as a trans_3g verse bearer in the skeleton structure of the machine.

In accordance with the invention there is further attached to the air receiver the main frame which, in contrast to the hitherto known types 40 of construction, can be made very light, since it is only required to carry the shafts or handles, the side walls or casing, and the cover or hood if such be used. The radiator and the fuel tank, the latter being arranged, if desired to take the 45 place of a cover or hood, are mounted on this main frame, but subject the same to very little strain since they are mounted directly over the air receiver. These parts can also be mounted in the same position but directly attached to the air 50 receiver.

By this novel arrangement the cylindrical air [ receiver, which is of very great strength in consequence of its shape, is made to serve as the backbone of the unit, so that the main frame and 55 the axles can be made very light.

(Cl. 230—3)

In consequence of the described principle of design which results in the crank-shaft of the compressor unit being disposed transversely of the traveling unit and the bulky air receiver well out of the way beneath the engine, the radiator 5 can be placed closely adjacent the fly-wheel which can therefore be constructed as a blowerfan, with the result that the hitherto usual fan with separate drive can be dispensed with, thereby effecting a further saving of weight and in- 10 crease in reliability.

The set of the air receiver transversely to the direction of travel enables the unit to be designed with such contours that it can easily travel over the usual obstacles, particularly hollows, ditches, 15 and the like, without its progress being impeded by projecting parts. Protruding obstacles are also readily negotiated by virtue of the rounded shape of the cylindrical air receiver. The latter also prevents the unit from sinking too far into ₂o bog, sand, snow, and the like.

In place of or in addition to running wheels there can also be provided skids for the sliding movement of the unit and also to· prevent the road wheels from sinking too far into soft ground. 25 Skids of this nature can be used alone as a foundation for the unit when standing.

The construction according to the invention permits of the complete motor compressor being dismantled and taken apart into a few portable 30 units, for example for mountain transport. These units form tidy packages which are not liable to become soiled or damaged. The parts can be reassembled simply and rapidly.

A form of construction embodying the inven- 35 tion is shown by way of example in the accompanying drawing, in Fig. 1 in side elevation, and in Fig. 2 in end elevation.

Fig. 3 is a plan view;

Fig. 4 is a central horizontal section through 40 the compressed air receiver I and shows also the mounting of the wheel axle.

Referring to the drawing there is mounted on the cylindrical compressed air receiver I, which is disposed transversely to the direction of travel, 45 the motor-compressor-unit 2 with its communal crank-shaft parallel to the longitudinal axis of the compressed air receiver I. To the two ends of the latter there are attached, either rigidly or resiliently, the trunnions 3' for the road wheels 50 4. Figs. 1, 2, and 4 show constructional examples in which the wheel trunnions or axle are supported resiliently, i. e., with the interposition of springs.

As shown in Fig. 1, a tube 11 can be passed with 55

2,074,293 packed joints lengthwise through the air cylinder, and, in the case of non-resilient mounting, the trunnions 3 may be attached to this tube. The two suspension springs 13 can either be at₅ tached to the ends of the cylinder, or, as shown in the drawing, can be articulated to brackets or the like I ί attached to the casing of the cylinder.

On the air receiver I there is further mounted the main frame 5 which carries the shafts 6, the 10 side walls and casing 7, and the radiator 8. The fuel tank 9 is arranged to serve as a hood over the engine and compressor. The fly-wheel 12 is constructed as a blower fan.

To the frame 5 or to the air receiver I there 15 can also be attached skids 10.