US897936A - Valve-stem case. - Google Patents

Description

I PATENTBD SEPT. 8, 19%.

a, SZNKLER: VALVE STEM CASE,

APPQICATLOEI nun 0012].. 1907.

Win/E555,

EDWARD B. SINKLER, on NEW YORK, N. Y-.

' VALVE-STEM CASE.

Specification of Letters Patent;

Patented Sept. s, 1908-.

Application filed October 1, 1907. Serial No. 395,350.

'To all whom it may concern:

Be it known that I; EDWARD B. SINKLER, of the city ofNew York, borough of Brooklyn, county of Kings, State of New'York,'

have invented certain new and useful Im provements in Valve-Stem Cases, of which the following is a full, clear, and exact specification, such as will enable others skilled in the art to which it appertains to make and use the same. 7

My invention relates particularly to the valve stems and actuating devices of internal combustion engines such for example as the typical gasolen'e engine employed in automobile work. In such engines it is a well known disadvantage that dust and grit attach themselves to the valve stem and its actuating device with the result that the guides are cut and the parts become loose. From this condition lost motion arises thus destroying the pro er timingof the valves. Further, as the gui es are cut the tight fit of the stem in the stem guide is destroyed and thus the efiect of the suction stroke of the piston-is impaired with the result that the charges are not properly drawn into the engme.

The object of my invention is to overcome this disadvanta e and I attain this result by means of a pecu 'arly constructed case which incloses the valve stem and its actuating pin or rod and which is held in place by the spring that serves also to seat the valve which spring is thereby caused to perform a double functlon. This case tightly incloses all of the moving parts and effectually excludes the entrance of dust and other gritty sub stances. It also serves asa means for holding a lubricant and directs this lubricant from 40' the valve stem and its actuating device into the crank case. of the engine Where the lubricant is again utilized, effecting a decided economy in this respect. v

The invention is applicable both to the admission and exhaust valves of the engine and is articularl'y useful on the admission valve.

he invention involves various other fea-.

tures of importance, and all will be fully set forth hereinafter and particularly pointed out in the claims.

Reference is had to the accompanying drawings,which illustrate as an example, one manner ofembodying my invention; in which drawings,

Figure 1 is a vertical section showing the inaention; Fig. 2 is a reduced side elevation zontal section on the line 3'3 of Fig. 2.

of the case and 3 is an enlarged hori- (1, indicates the stem of the valve which stem is of that construction usually incidentto the puppet or similar-valves of gasengines. The stem passes through the usual guide 12 and into the combustion space of the engine as will be understood from the prior art. 1

(3 indicates a fragment of the usual cam for actuating the valve which engages a roller (1 held in the fork e of the stem operatin pin or rod e. This is provided with the usua ad ing the cam shaft of the engine. A fragment" of this case is indicated at in the drawings. All of these parts may be of the usual or any desired construction.

it indicates my miproved case which is j preferably constructed of aluminium castings though it may of course be of other Ina-- terials. It is made by preference in two sections as indicated in'Fig. 3 and these sections are,removab1y held together by means of swing bolts h pivoted on and engaging lugs it formed on or fastened to the casting. By these devices, the castings may be quickly engaged and disengaged. For the purpose of effecting a tight joint between these, sections, I provide a gasket h of felt or vthe like which is let into the edges of one section to engage the adjacent edges of the other section. The case is also provided with a plug h or other device facilitating the introduction of oil as will be fully set forth hereinafter. This case incloses the exposed parts of the valve stem and its actuating rod andextends from the stem guide I) to the rod guide f.

i indicates the usual spring which is connected with the valve stem to seat the valve.

This spring is also inclosed by the case and to performing its usual functions in seating the valve, serves also to hold the case in posiliun. pressing it firmly against the gasket g and shoulder b. contracted to meet the upper end of the At its lower end the case is guide f and at this point 18 provided with the gasket of felt or other material h which is let into the edge of the case and engages the guide f .to form a firm connection. It will thus appear that the ease completely incloses al of the moving parts concerned with the valve stem and that it is sustained firmly by the spring t', the lower end of the case inelosing the guide f but not necessarily sustained by-it. This case, it will be seen, fully protects all of the parts from dust, dirt and other accumulations tending to cut and wear theparts and it, therefore, prevents them from wearing and becoming inaccurate in action. it also enables me to fully lubricate the parts by filling or partly filling the ease with oil. This oil is retained by the gasket la and willv eventually find its way between the stem f and rod e into the crank case of,

the engine, Where it will be further utilized by lubricating the cams and the cam shaft.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent of the United States is 1. The combination with an engine having a valve stem and an actuating device thereior, oi a case extending between relatlvely stationary parts of the engine and inclosing the exposed portions of the valve stem and actuating device, and a s ring engaging-the valve stem to seat the va ve and also engaging the case to hold it in place. V

2. The combination with anengine having a valve stem and an actuating device therefor, of a case extending between relatively stationary parts of the engine and inclosing the exposed portions of the valvestem and actuating device, said case being formed into two longitudinal sections and having means for removably holding them together, Whereby the case may be. applied to and removed from position.

3. The combination in an internal combustion engine of a valve stem a guide for the stem a case inclosing the exposed portion of the stem and extending fromthe guide, and a spring engaging the valve stem to actuate it and also engaging the case to hold it in position. i

In testimony whereof'l have signed my name to this specification the presence of two subscribing Witnesses.

, EDWARD B. SINKLER. Witnesses K HENRY W. HAsE, FREDERIO N. WHITLEY.

Images