US2086705A - Valve for internal combustion engines - Google Patents

Description

July 13, 1937. G. ELLIS 2,086,705

VALVE FOR INTERNAL comsusnou ENGINES Filed June 9, 1956 (It umu;

?atented July 13, 1937 UNITED STAT gates PATENT 1? EFECE VALVE FOR INTERNAL COMBUSTION ENGINES 6 Claims.

This invention relates to valves for internal combustion engines and is particularly adapted to automobiles, tractors and truck motors.

The primary object of this invention is to provide a valve that will not have to be ground after it is once fitted to the seat because it is a sellseating type of Valve thereafter.

Another object of the invention is that it en ables the combustion chamber to be directly over the piston head.

Further object of the invention is that there is no adjusting of tappets required after the valves have once been timed to the motor.

A further object of the invention is that due to the design of the valves the ports can be opened and closed rapidly.

I And a still further object of, the design of this valve is that it is self-adjusting at all times in regards to clearance, due to expansion and contraction.

These andother incidental objects will be apparent in the following specification and claims.

Referring to the drawing:

Figure l is a side elevation of a motor, partially broken away, having my new and improved valves installed therein.

Figure 2 is an end sectional View, partially broken away, of Figure 1, taken through the exhaust valve port showing the exhaust valve closed.

Figure 3 is a fragmentary sectional view taken through the intake port, showing the valve in open position.

Figure 4 is a perspective end view of one of my new and improved valves.

Figure 5 is a sectional end view of the valve assembly support and adjusting means, taken on line 5-5 of Figure 1.

Figure 6 is a fragmentary side view of the valve supporting bar.

In the drawing:

l is an internal combustion motor, having the usual cylinders 2, pistons 3 and connecting rods 4. The combustion chamber is indicated at 5. Each of the cylinders have one exhaust valve 6 and one intake valve 7. These valves are mount ed upon a shaft 8 running longitudinally of the motor. The shaft 8 is fixedly mounted upon the bar. 9 by upwardly extending bearing supports it. The valves 6 and "l have bearing sleeves ll within the downwardly extending legs I2 forming a bearing support for the main body I3 of the valve. The valves consist of half or semi-circle bodies, havin counter sunk portions I l, which provide a by-pass for the gases when registered with the proper ports.

Referring to Figures 1, 2 and 3. In Figure 3 the intakevalve is shown open. sunk portion being registered with the intake port 65 from the fuel supply, not here shown, and the port it leading to the combustion chamber 5. The valve was placed in this position by the cam shaft l'l actuating the push rod is, contacting the under side is of the valve with its rounded bearing end 29. At the same time the push rod 2i was forced downward against the spring tension 22 which will return the valve to the starting position when the push rod i8 is allowed to lower by the action of the cam ll.

Referring to Figure 2, the valve 6 is shown having the counter sunk portion M out of registry with the ports 23 and 2d of the exhaust line. The valve operating mechanism is the same as heretofore described. The valve bodies have flanged ends 25 which fit into grooves 25 of the block and tend to seal the gases within the chambers. These flanges are tapered, best shown in Figure 1 at 21, therefore they are self sealing when the valve body is forced upward into the block.

The valve supporting bearing shaft 8 is drilled for the passage of oil as shown at 28. The valves have oil passageways 29 for directing the oil for lubrication purposes over the surfaces of their seats by the grooves 30. In order to remove the valve assembly or replace it the push rods l8 and 2| are removed from the motor by removing the screw 3! and cap- 32 of the valve guide supports The valve assembly supporting bar 9 rests in the floating adjustable bearing blocks 34- and 35, one of these sets of blocks being located on either end of the motor within the housings 36 and 31. Adjusting bolts 38 and 39 center and adjust the blocks 34 and 35 so that the bearing supporting bar 9 will be in the proper position relative to the valves and their seats. The bearing blocks 34 and 35 straddle the end Ml of the bar 9. The adjusting screws 33 ext-end part way into the blocks having a flexible element 41! directly in contact with the block and against the shoulder 42 of the adjusting screw. This flexible element permits a limited movement to take care of expansion and contraction of the valve assembly and is very important. In order to remove the valve assembly, as stated before, the valve push rods are first removed after which the bars 44 are removed allowing the bearing block and the valve supporting bar 9 to be pulled towards the The counters left of Figure 5 and the whole assembly dropped down and out through the side of the motor after the plate 45 has been removed.

I do not wish to be limited to this particular form of construction as my invention may take other mechanical embodiments still coming within the scope of the claims.

What is claimed to be new is:

1. An internal combustion engine having a valve chamber formed with a plurality of semicylindrical valve seats arranged in pairs for each cylinder, a semi-cylindrical valve cooperating with each seat, said valve being formed with a peripheral depression, the inlet port and exhaust port of each cylinder being closed when the valve is in one position and opened through the de pression in the Valve when the valve is in another position, a shaft for supporting all the valves, and removable means for supporting the shaft, said means including a bar terminally extended beyond the valve chamber and means for adjusting the bar vertically to thereby maintain appropriate contact between the valves and their seats.

2. A construction as defined in claim 1, wherein the bar adjusting means is constructed to automatically compensate for expansion and contraction of the valve assembly.

3. A valve mechanism for internal combustion engines, including a valve chamber formed with a plurality of semi-circular valve seats arranged in pairs for each cylinder, a valve supporting bar extending lengthwise the valve chamber and beyond the ends of said chamber, means beyond each end of the valve chamber for vertically adjusting the bar, a shaft supported by the bar within the valve chamber, a series of valves supported for rocking on said shaft, said valves cooperating accurately with the respective valve seats, with each valve sealed against the adjacent valve, the periphery of each valve being formed with a depression, the inlet and exhaust ports from the cylinders opening through the respective valve seats and being closed by the normal periphery of the valve and opened through the depression in the valve, a cam-operated valve stem for each valve and operative under the influence of the cam to rock the valve to a position to cause the depression in the periphery thereof to open the particular port, a spring-pressed valve stem cooperating with each valve and operating the valve when free of the influence of the camoperated stem to a position to cause the normal periphery of the valve to close the particular port, and means in the valve chamber for removably supporting the respective valve stems for each valve.

4. A construction as defined in claim 1, wherein the valve adjusting means includes blocks embracing the ends of the bar and means for adjusting the blocks toward and from each other, said adjusting means being yieldingly connected with the blocks to permit expansion and contraction.

5. In combination, an internal combustion engine formed with a valve chamber and with a cylinder service port, the continuity of the service port being interrupted at the margin of the valve chamber to provide two distinct sections of such port, both of which open into the valve chamber, a rocking valve mounted in the valve chamber and formed with a cylindrical surface to accurately fit the valve chamber and with a fiat side, means for pivotally supporting the valve in the plane of the fiat side, an element free of connection with the valve and bearing on the fiat side in one direction beyond the pivot, and means bearing on the flat side in the opposite direction from the pivot to normally maintain a closed position of the valve with respect to the cylinder service port, the operating means serving to move the valve to cause the valve depression to register with both sections of the service port to complete the continuity thereof.

6. A construction as defined in claim 5, wherein the means for operating the valve is longitudinally adjustable to control the accuracy of valve movement in establishing communication between the sections of the service port.

GEORGE L. ELLIS.

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