US2200199A - Internal combustion engine - Google Patents

Description

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INTERNAL COMBUSTION ENGINE Filed Nov. 33, 1958 4,Sheets-Sheet 1 In ventor Blaine W Br n y 1 May 7, 1940.

INTERNAL CDRBUSTI 0N ENGINE Filed Nov. 8, 1938 4 Sheds-Sheet 2 I m I Inventor Blaine WBraw/wle, I o By 5 May 7, 1940.

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INTERNAL COMBUSTION ENGINE 4 Sheets-Sheet 3 Filed NOV. 8, 1938 Inventor I Bid/Z w e Wfirwgxoigj:

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. 1mm colmus'non ENGINE V 7 Filed Nov. 3; 193a 4 Shots-Sheet 4 e WBrwqfmiq Inventor a Patented May 7, 1940 UNITED. STATES PATENT OFFICE j 1 INTERNAL COMBUSTION ENGINE Blaine W. Bradfute, Jr., Bloomington, Ind. Application November 8; 1938, Serial No. 239,576 v 1 Claim. (01. 123-56) This invention appertains to new and useful improvements in internal combustion engines and more particularly to an engine constructed in such a manner to eliminate a number of the parts of the present-day types of engines, thus reducing the cost and operating expenses.

An important object of the present invention is to provide an engine of the aligned cylinders type wherein the pistons are associated and conl0 structed in such a manner as to eliminate connecting rods.

Another important object of the invention is to provide an engine of the character stated which will be smooth-running and not susceptible to the ready development of defects.

These and various other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the engine. I

Figure 2 is a longitudinal sectional view on line 2-2 of Figure 1.

Figure 3 is a longitudinal vertical sectional view taken substantially on line 3-3 of Figure 2.

Figure 4 is' an end elevational view.

Figure 5 is a perspective view of one of the eccentric riders.

Figure 6 is a fragmentary detail sectional view showing one of the pintles.

Figure 7 is a side elevational view of one of the gears.

Figure 8 is a sectional view taken substantially on line 88 of Figure 2 showing only the eccentric.

Figure 9 is a fragmentary top plan view of the eccentric.

Figure 10 is a top plan view of the pistons as sembly.

Figure 11 is a sectional view taken substan tially on line of Figure 10.

Referring to the drawings wherein like numerals designate like parts, it can be seen that the invention includes the two aligned cylinders 5 and 6 each provided with heat-dissipating fins 1. The outer end of each of these cylinders 5-6 is provided with an intake shell construction 8 and an exhaust shell structure 9, each of which has a valve stem I0 apertured therethrough and with one stem equipped with the inlet valve and the other with the exhaust valve l2. These stems are provided with rockers |3 for operating the same, the rockers of the valves being operated by the rods l4, while the rockers of the valves |2 are operated by the rods l5.

As shown in Figure l, the eccentric oil case consists of the pair of semi-cylindrical sections l6 and I1 flanged and bolted together as at l8 and as can be further seen, the inner ends of the aforementioned cylinders 5 and 6 are secured by 5 screws I9 to the case sections l6 and I1.

Numeral 20 represents the drive shaft (see Figure 2) which has the cam disk 2| thereon operating within the confines of the pistons assembly generally referred to by numeral 22. This 10 assembly consists of the two aligned piston heads 2324, each having its skirt portion 25, and these skirt portions are provided with tubular extensions 26-46 slotted as at 21 and 28 so that when they are joined together as shown in Fig- 16 ure 10 elongated slots are formed through which the eccentric can operate and also through which the drive shaft 20 can operate.

As can be seen in Figure 11, the adjacent end portions of the extensions 26 are reduced and 20 interlapped as at 29 and in this interlapping position secured together by screws 30.

The pistons 23 and 24 are placed within the cylinders 5 and 6 respectively, and inside of each of the pistons 23 and 24 is a diametrically dis- 25 posed bridge 3| which is channeled to form the pocket 32 for receiving the grooved block or rider 33, in the groove a of which rides the ring 34, which ring is formed with a transversely convex peripheral surface for even riding engagement 30 in the grooves a of the said blocks or riders 33. As shown the groove a in each block or rider 33 is of substantially trough shape in cross section, the walls of which conform tothe convex peripheral surface of the ring or eccentric strap 5 34.

The peripheral portion of the eccentric disk 2| is formed with the circumferentially extending channel 35 (see Figure 9) for receiving the roller bearings 36 thus affording anti-frictional means m between thedisk 2| and the annulus 34.

'As can be clearly seen in Figures 2 and 3, the backside of; the riders.33 are each provided with a pair of threaded members 31 for disposition through openings in the corresponding bridge 3|. 45 The threaded members are provided with nuts 38 to prevent displacement of the riders. I

At each side of the engine construction is a casting 39 which has a bearing construction 40 at its intermediate portion through which the 50 reduced portion 4| of the drive shaft 2|! extends. The casting 39 is provided with side walls 42 through which the pitmans 43 are operative, these pitmans 43 being connected to'the corresponding rods l4 and I5. 55

.mesh with the pinion 46 carried by the corresponding reduced portion 4| of the drive shaft 20. These gears 45'carry cams 41 which ride against the corresponding ends of the pitmans 43 to result in the operation of the same.

As can be seen, each cylinder is equipped with a spark plug 48.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention .what is claimed as new is:

An engine comprising a pair'of aligned cylinders, a pair or pistons in the cylinders, meals I for connecting together the inner ends of the pistons, a shaft passing between the inner ends oi! the pistons, an eccentric on the shaft, an eccentric strap surrounding the eccentric, a transverse member extending across each pistonadjacent its inner end and having a channel in that part which is adjacent the eccentric strap, said channel extending transversely, a block of elongated form fitting in each channel and having a iongitudinally extending groove in its outer edge,

said groove being of substantially trough-shape in cross section to provide arcuate walls and the outer circumference of the strap being of arm-- ate shape in cross section to engage the arcuate' BLAINE w. BRADFUTE, Jn.

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