US1974454A - Oscillating valve - Google Patents

Description

Patented Sept. 25, 1934 UNITED STATES I OSCILLATING VALVE Louis I. Gamache, Inglewood, Calif.

Application February 8,

'2 Claims.

My invention relates generally to valves and more particularly to the type of oscillating valve set forth in. U. S. Letters Patent No. 1,781,901, issued November 18, 1930.

The principal objects of my invention are,to generally improve upon and simplify. the construction of the valve disclosed in the aforesaid patent, as Well as other similar forms of oscillating valves and to provide an oscillating valve and its actuating mechanism that is capable of being readily assembled or taken apart so 'as to facilitate inspection, adjustments and repairs.

Further objects of my invention are, to provide a relatively simple and efficient bearing for the lower portion of the stem of the valve and which bearing comprises a minimum number of parts that are capable of facile adjustment in order to maintain the valve in proper operative position and further, to construct the valve and its operating mechanism-so that it will act positively to control, without leakage, the flow of gaseous fuel into the combustion chamber of an engine and also to control the discharge of products of combustion from thecombustion chambers. 1

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts that will hereinafter be more fully described and claimed and illustrated in the accompanying drawing in which:-

Fig. 1 is an elevational Viewv of an internal combustion engine equipped with my improved oscillating valve and its operating means.

Fig. 2 is an enlarged vertical section taken on the line 2-2 of Fig. 1. t

Fig. 3 is an elevational view of the body of the valve.

Fig. 4 is a horizontal section takenon the line 4-4 of Fi 2. I

Fig. 5 is a horizontal section taken on the line 5-5 of Fig. 2.

Fig. 6 is a horizontal section taken on the line 6-6 of Fig. 2. 1

Referring uby numerals V to I the accompanying drawing which illustratesa practical embodiment of my invention, 10; designates the cylinder block of the engine, 11 the combustion chamber therein, 12'the' piston'that operates within the combustion chamber and 13 a port and throat that communicates with the upper portion of the combustion chamber and which port may be either the inlet or exhaust port.

Projecting laterally from the upper ports of the cylinder block 10, is a valve housing 14 and 1932, Serial No. 591,521 (01. 123-81) rigidly positioned therein isa sleeve 15 provided with diametrically opposite ports 16, one of which communicates with the port and throat 13 and the openingl'l through this sleeve tapers gradually toward. its lower end, thereby providing a tapered seat for the oscillating valve.

The upper end ofthe valve chamber within the sleeve 15, is closed by a removable plate 18,

through which is formed a horizontally disposed duct 19 and leading downwardly from said duct and communicating with the upper ends of the valve chambers in the sleeves 15, are ports 20.

I Duct 19 is suitably connected to a source of liquid lubricant. supply, for instance, a pump providedwith a diametrically arranged port 23,

the ends of which are adapted to register with 1 theports lfivduring the oscillatory movement of 30 said valve and formed in the top of this valve is a recess 24 that is adapted to receive lubricant from the port 20.

' Leading through the wall of the valve, just above the bottom of the recess 24, are diametrig5 cally opposite ports 25, and formed in the periphery of the valve body and leading downwardly from the outer ends of these ports are small vertically disposed grooves 26 that terminate adjacent to the lower ends of the valve body. These ports 25 and grooves 26 are located on the surface of the valve body between the ends of port -.23 and they provide means for conducting liquid lubricant unto the surface of the valve as it oscillatesand also unto the surface of the tapered valve seat.

The upper end of a valve stem 27 is detachably secured in any suitable manner, preferably by means of ia pin or key 28, to the lower end of valve 22 and the lower portion of this valve stem is journaled in an adjustable bearing that is mounted on the upperportion of the crank case Formed in the upper portion of the crank case is a threaded opening 30 and formed in the crank case at one side of this opening and in communi-- cation therewith, is a notch 31.

The external threaded lower portion of a sleeve 32 is screw-seated in the opening 30 and the upper end of the sleeve terminates in a square or n hexagonal body 33 that may be engaged by a wrench or like tool for screwing the sleeve up- Wardly or downwardly through its threaded seat 30.

A lock nut 34 is screw-seated on the threaded portion of sleeve 32 and when tightened against the upper surface of the crank case, this nut securely locks the sleeve in its vertically adjusted position. This lock nut is in the form of a disc provided in its edge with notches 35 for the reception of a spanner wrench or like tool.

The lower portion of the opening through sleeve 32 is enlarged to form a chamber for a bail bearing 36 and the outer race of this bearing bears against the shoulder at the upper end of the chamber in said sleeve and the lower end of this outer race is engaged by a ring nut 3'7 that is screw-seated in the lower end of the chamber in the lower portion of the sleeve.

The upper end of the inner race of the ball bearing bears against a shoulder 38 that is formed on the lower portion of stem 27 and the lower end of said'inner race is engaged by the upper end of the hub portion 39 of an arm 40 and which latter is disposed at right angles to the axis of the valve stem or spindle 2'7.

Hub 39 is detachably connected in any suitable manner, preferably by means of a pin or key 41 to the lower end of stem 27 and depending from the outer end of arm 3'7 is a pin 42.

The length of arm 4Q'is such that it will pass upwardly through the notch or opening 31 when the valve and its operating parts are removed forthe purpose of inspection, adjustment or repairs.

The hub portion of a lever 43 is pivotally mounted on a pin or post 44 that depends from the upper portion of the crank case adjacent to the opening 30 that is occupied by sleeve 32 and this lever occupies a position immediately beneath and parallel with arm'40.

The free'end of lever 43 is provided with a short longitudinally disposed slot 45, through which passes pin 42.

Depending from the intermediate portion of lever 43, is a stud 46, upon which is journaled a roller 4'7 and this roller occupies the eccentric groove 48 that is formed in a cam 49 and the latter being carried by cam shaft 50. This cam shaft is suitably driven at proper speed from the crank shaft of the engine.

During operation of the engine with which my improved oscillating valve is associated, the roller 47, engaged by groove 48 in cam 49, imparts swinging movement to lever 43 and the engagement of the pin 42 in slot imparts swinging movement to arm 40 and due to the difference in the length of lever 42 and arm 40, the latter will swing through a greater are than lever 43 and thereby'impart the desired oscillatory movement to stem 2'7 and valve 22.

As the ends of the port 23 in the valve register with the ports 16 in sleeve 15, communication is established between the combustion chamber and the manifold to permit gaseous fuel to enter the combustion chamber or to permit burnt products of combustion to pass from the combustion chamber to the manifold and in proper time relation 7 to the movement of piston 12 the valve will be oscillated so as to move the ends of port 23 out of registration with ports 16, thereby cutting off the further flow of gaseous fuel or products of combustion through the valve.

During this oscillatory movement of the valve and its stem, the lower portion of said stem operates with minimum friction as a result of the provision of the ball-bearing between the lower portion of said stem and sleeve 32 and during oscillation of the body of the valve, the surface thereof and the surface of the tapered seat 17, is lubricated by liquid lubricant that passes through ports 25 and flows downwardly through the grooves 26.

Sleeve 32 may be screwed upwardly or downwardly in its seat to provide the necessary adjustment for the bearing at the lower end of the valve stem and after such adjustment the sleeve tion or repairs and during such removal the end of arm 40 passes upwardly through notch or opening 31. Thus it will be seen that I have provided an oscillating valve that is relatively simple in construction, inexpensive of manufacture, capable of being readily assembled or taken apart and which is very effective in performing the functions for which it is intended.

My improved valve is positive and reliable in operation and is capable of being easily and accurately adjusted so as to take up any wear that may occur and consequently preventing leakage of the gaseous fuel or products of combustion that pass through the valve and the sleeve in which it oscillates.

It will be understood that minor changes in the said stem, a sleeve screw-seated in a threaded opening in a fixed part of the engine in which the valve is associated, means for locking said sleeve in differently adjusted positions, an arm carried by the lower portion of said valve stem,

there being an opening in the fixed part of theengine to permit the insertion and removal of said arm while positioned on said stem and means for imparting swinging movement to said arm to oscillate said valve carrying stem.

2. In an internal combustion engine, the corn-- bination with a valve stem, of a bearing adjustably seated in a fixed part of the engine structure, which bearing receives the lower portion of said valve stem, an arm carried by said stem below said bearing and there being an opening" formed in the engine structure adjacent to said bearing for permitting the insertion and removal of said arm while secured to said stem. 7

- LOUIS P. 'GAMACHE.

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