US1225916A - Rotary disk valve for gas-engines. - Google Patents

Description

T. ARMSYRQNQ ROTARY MSK VALVE ma GAS melma 2 SHEETS-*SHEET lL ,if fr rw s. Y,

f) fewer? I //UWi k/ W T. ARMSTRONG. HGr/WY DISK` VALVE Fam GAS ENGINES.

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www@ May 15, 1917.

EDWIN T. ARMSTRONG, 0F ADRIAN, MICHIGAN'.`

ROTARY DISK ALVE FOR GAS-ENGINES.

Speclcation of Letters Patent. Patented May 15, 191'?,

y Application led November 8, 1916. Serial No. 130,288.

To all whom t may concern.'

Be it known that I, EDWIN T. ARM- STRONG, a citizen of the United States, residing at Adrian, in the county of Lenawee and State of Michigan, have invented a new and useful Rotary Disk Valve' for Gras-Engines, of which the following is a specification.

This invention relates to new and useful improvements in rotary disk valves for in- ,ternal combustion engines.

The principal object of the invention'is to produce a simply constructed noiseless valve which'may be operatedA Without the use of springs creams, to take the place of the usual puppet or sleeve valves.

A seconda-ry object is to produce a valve, the operation of which will be mechanicallyy positive at all times and will not be affected by the deposits of carbon. l

Still another object is to provide a valve which, while having large gas passageways,

`'will be so constructed that it will be absolutely gastight except when the ports are opened.

With these and other objects in view the invention resides in the novel features of construction, combination and arrangement of parts which will be hereinafter more particularly described and claimed, and shown in the drawings wherein:

Figure l represents a vertical transverse sectionthrough a portion of an internal' combustion engine, certain parts of which,

including the top plate, are removed for the sake of illustration;

Fig. 2 is a bottom plan View of the uppermost valve disk;

Fig. 3 is a similar view of the ring which surrounds the rotary valve head;

Fig. 4 is a top plan-view of thelowermost disk;

Fig. 5 is 'a similar view of the valve head;

and

Fig. 6 is a vertical sectional view through the several parts of the invention.

In the preferred embodiment of my invention which is illustrated in the accompanying drawings, wherein similar reference characters designate like parts throughout the several views, it will be noted that the valve is in the casing C of the engine adjacent the inlet and outlet to andfrom the cylinder C in which the piston P reciprocates. Fig. l shows the inlet 1 from the intake manifold and the outlet 2 leading to the exhaust manifold on the same side of the engine, these openings lcomrnunicat'mg with openings 3 and 4 respectively formed in a circular plate or valve disk 5 which is disposed in a seat in the upper end of the. engine casing directly over said openings 1 and 2. It will be noted that `the lateral, walls 6 of each of the openings 3 and 4 are the parts of radii of the circle which forms the periphcr of the disk, and that the curved sides are parts of concentric circles whose center is the 'center of the disk. f

Upon this disk 5 is placed a ring 8 whose .outer diameter is the same as that of the disk 5` with which it contacts. A second disk 9 also being of a diameter to closely fit the seat 5 rests upon the ring 8. The last named disk i) also has a pair of openings v1() and 11 which aline with the openings 3 and 4; the lateral walls`12 of these openings 10 and 1.1-as well as the curved walls 13 are formed substantially as the corresponding wallsG and 7 of the open, ings in the first mentioned disk. A

In order that these openings 3 and 4 may be held in registration with the o enings 1thy and 11 respectively, a plurality oiD 14 are formed in the disks adjacent the -apertures l edges. said ring 8 also having similar apertures. all oi' which are adapted to aline for the reception of the machine bolts 15, the threaded ends of which are screwed into the casing C. Before,however. the top disk 9 is screwed down upon the ring 8, the valve head is placed in position therebetween, the latter consisting of a circular disk-like plate 16 of a diameter substantially the same or slightly smaller than the inner diameter of the ring 8. anda thickness approximately equal to that of said ring. The head 16 has a valve stem 17 fixed to its lower face and in its center. said stem extending through an opening 1S in the center of the lowermost disk 5. The head further has a single opening 19 formed therethrough, Said openving having walls QO which are parts of the radii of the periphery of the disk` and whose curved walls are parts of concentric circles. the center of which is the center of the disk. Thus when the valve stem 17 is caused to rotate, the valre head 16 will si multaneously rotate between the upper and of which mesh with the teeth on a second beveled gear (not shown) which is carried b v one face ot' the spur gear '22, the latter in turn being in mesh with a second spur gear 225. Both of these gears and :Z3 are of the saine diameter, the latter being disposed in engagement with a gear 2l whose diameter is substantially one-half of that of the other, this last mentioned gear Q4: being mounted on the crank shaft S to rotate therewith. Through this train of gears the motion of the crank shaft is transmitted to the valve stem and thence to the valve head and is suitably controlled through the various sized gears to permit the openings in the valve head and valve disks to register at the proper moments.l

As the piston P moves from its highest to its lowest point after an explosion, the

valve head will be rotated to bring its opening in alinement with the openings or ports 3 and l0 in the disks which are disposed above and below the same, thereby allowing the exhaust gases to be forced out into the exhaust manifold by the next upstroke of said piston. The moment the piston reaches its highest point the opening in the valve head will have moved beyond the edges of the ports 3 and 11, and as the piston starts its nextdown stroke this opening 19 will commence to register with the ports l and 11, thus permitting a charge of gas to ybe drawn into the cylinder C. Continued, movement of the crank shaft of the engirie causes the valve head to rotate to move its opening out ol alinement with the otherV openings in the valve disks, the parts being so disposed daring the compression and ex plosion of the gases, the latter event talking place when the opening 19 is midway between the ports in the valve disks, To facili tate the rotation of the valve head and to prevent the same from sticking, oil grooves 25 and 2G are formed in the upper and lower faces of the disks 5 and 9 respectively. These grooves extend from the peripheries of the disks to substantially the centers thereof, thus permitting oil to be spread over both faces of the valve head and thoroughly lubricate the same. The upper face of the valve disk 9 is slightly convened as illustrated in Fig. 1 to prevent'the same from warping, and otherwise strengthen it to receive the force of the explosion of the gases.

From the foregoing description, it will he seen that a. very simply constructed rotary valve has been produced which will take the place of the usual sleeve or puppet valves and will operate much more efficiently.'

I claim: i

l. The combination with an engine having a seat therein; of a valve disk. disposed in said seat and having a central aperture and a pair. of openings spaced outwardly from said aperture, a second valve .disk spaced from the first and having a pair of openings alined with those therein, a valve head comprising a flat circular plate disposed between said disks and having a single opening adapted to register with either of the alined openings in the disks, a valve stem connected with the valve head and extended through said central aperture into theicrank case of said engine, a beveled gear carried by the inner end of said stem, a spur gear, asccon'd beveled gear carried by said spur gear to mesh with the first beveled gear,

a second spur gear in mesh with the first mentioned spur gear, each of said gears bcing of the same size, and a pinion carried by the crank shaft of said engine and meshing with the second spur gear, said pinion being one-half the size of said gear.

2. The combination with an engine having a seat therein; of a valve disk disposed infgyid seat and comprising a flat circular said disk having a central aperture an a ,pair of openings spaced outwardly from said aperture, a second valvel disk also disposed in said seat and comprising a circular plate having a pair of openings alined with the openings in the first mentioned.

disk, the inner face of said plate being flat and its outer face convex, a ring of a diameter equal to the diameter of said disks and disposed therebetween, fastening elements connecting said disk and ring to the engine, a valve head in the form of a fiat circular plate disposed within said ring, said head heilig of a diameter substantially equal to the opening in said ring and of approximately the same thickness as said ring and having a. single opening therein, a valve stem extended through said central aperture and connected to the valve ,head ccntrally thereof, and means for rotating said valve head to move its opening into registration with either of the openings in said disks. y

EDWIN T. ARMSTRONG.

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