US1855634A - Valve structure for internal combustion engines - Google Patents

Description

April 26, R, R NG 1,855,634

VALVE STRUCTURE FOR INTERNAL COMBUSTION ENGINES Filed Sept. 25, 1928 5 61 Hot M ro Patented Apr. 26, 1932 ROLLIN R. INGALLS, or NOBBECK, sourn. DAKOTA VALVE srnuorunn "FOR inrnnnanlooiunusrion ENGINES, I

Application filed. September 25, 1928. Seiial No. 308,255. a

The present invention is directed to improvements in valve structures for internal combustion engines.

The primary object of the invention is to provide a device of this character so constructed that the valve will unseat with comparative ease against pressure of the exhaust gases, and under little power from the valve actuating cams.

1 Another object of the invention is to provide a device of this kind having all of the advantages of an overhead valve mechanism without the complications of rocker arms and push rods.

Another object of the invention is to provide a structure of this nature which is so constructed that the resistance of the exhaust gases against the valve will be practically eliminated, thereby permitting the valve to actuate against comparatively little pressure.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which Figure 1 is a Vertical sectional view through a part of the engine.

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

Referring to the drawings, 1 designates a cylinder in which is reciprocable the piston 2, said cylinder having a removable head 3,

equipped with the usual spark plugs 4. The

head 3 is provided with a valve seat 5 which communicates with the pipe 6, which serves as an inlet or exhaust according to which type of valve it is associated with. 7

It will be of course understood that each cylinder is provided with two valves and two seats for controlling the inlet and exhaust.

The head 3 and cylinder 1 are provided with the conventional water jacketsS 7, respectively.

Formed in the cylinder block and in direct alignment with the seat 5 is a cylindrical valve casing 9 in which is movable the hollow valve 10, which is closed by a head 11 having a rim 12 upon its upper end which cooperates with the seat 5 to control the exhaust or inlet.

The valve 10 isprovided' upon its lower end with a socket 13 in which is swiveled the head 14 carried upon the upper end of the valve stem 15, said stem passing through the guide openings 16 formed in the bracket-.17 supported by the cylinder block. By swiveling the valve to the stem itwill be obvious that the valve can rotate duringits reciprocation I g T A. coil spring 18encircles the stem and is interposed between the valve 10 and bracket 17, said spring serving to urge thevalve toits seat. 1

The lower end of the'stem 15 is adjustably threaded into theupper bar 19 of theframe 20, said frame including sidebars 21 and a bottom bar 22, the side-barshaving 'longi tudinal grooves 23 formedftherein, the purpose of which; will be later explained.

The crank case 24 is provided with a 'chamber 25, the side walls 26 26 thereof having diametrically opposed vertical ribs ZR-2T I carried thereby, which slidably engage the grooves 23 of the frame 20 in order that said frame will be effectively guided during its travel. 7 r

The camshaft 2 8 is controlled by the crank shaft of theengine as customary, and has fixed thereto cams 29 which are confined within the frame 20.

It will beobserved that the cams 29 engage the bar 22 of the frame only during rotation thereof, which unseats the valve at proper intervals to admit a charge of fuel or permit the exhaust of the products of combustion from the combustion chamber. The spring 15 will obviously urge the valves to their seats after each revolution of the cam.

The rims 12 are comparatively narrow, therefore the exhaust gases passing through the seats have a slight pressure upon the rims thus permitting the valve to unseat with ease, and with very little power'from the cams.

It will be observed that the combustion .95 chambers have direct communication with the seats5 through a single straight passage 30, and since the valves are so constructed as to eliminate the use of comparatively largeheads and narrow. stems the collection of 1 carbon upon the valve is practically eliminated.

The cylinder block carries bolts 31 which serve to retain the cover plate 32 in place, 5 access being had to the stems for adjusting the jam nuts 33 to compensate for wear and make minor adjustments upon removal of the cover plate.

From the foregoing, it is thought that the 10 construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, and

16 proportion and minor details of construction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

What is claimed is:

20 In an internal combustion engine, a hollow cylindrical valve closed at both ends and having a central valve stem opening in one end, a cylindrical valve casing for the valve integral with the engine wall, the valve having a bevelled outstanding rim at the top, a beveled valve seat in the engine structure to receive said rim, a valve stem loosely mounted in said opening upon which said cylindrical valve may swivel, an integral disk head on 80 said stem rotatably and snugly received in the bore of the cylindrical valve to prevent wobbling of the stem,a helical spring surrounding said stem. and bearing at one end upon said cylindrical valve for yieldably 36 holding the valve closed, a bracket extending outwardly from the engine wall and performing the dual function of a support for the other end of said spring and a guide for said valve stem, and means for actuating said 40 valve stem to open the valve against the tension of said spring.

' In testimony whereof I aifix In signature.

ROLLIN R. 'INGALL [1,. 8.]

Images