US1368447A - Wiper-ring for the cylinders of internal-combustion engines - Google Patents

Description

1. E. rmzesom.v WIPER RING FOR THE CYLINDERS OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED LAN- 3. I920- Patented Feb. 15, 1921.

JOIN is. mn'cson. or GATSKILL, NEW YORK.

wIrEa-Rmo FOR THE CYLINDERS or m'rnn'nar-comnnsrron "enemas.

Specification of Letters Patent.

Patented Feb. 15, 1921.

. Application filed January 3, 1920. Serial No. 349,157. 1

To all whom it may concern:

Be it known that I, JOHN E. MEosoN, a citizen of the United States residin at Catskill, county of Greene, tate of ew York, have invented a certain new and useful Improvement in Wiper-Rings for the Cylinders of Internal-Combustion Engines,

of which the following is a specification,

reference being had to the accompanying drawing, forming a part thereof.

This invention relates generally to internal combustion engines and, more particularly, to a certain new and useful improvement in wiper-rings, so-called, for the cylinders thereof.

In internal combustion engines of the splash system of lubrication type especially, lubricant from the crank-case will, unless prevented, work u the cylinder wall and find its way into t e on ine combustion or explosion chamber, the e ciency and proper operation of the engine being thereby detrimentally afi'ected.

The chief object of my present invention is to obtain the efiiciency and proper operation of the engine bein so aifected, and with this and other ob ects in View, my present invention resides in the provision 'upon the piston, of a socalled wiper orauxiliary ring so constructed and cooperating with the piston and cylinder-wall as to .form what might be designated or described as a seal between the piston and cylinderwall against the lubricant working up the cylinder-wall into the combustion-chamber, t e ring carrying up with it on the upstroke of the piston only suflicient lubricant to properly lubricate the rubbing faces or suraces of the piston and cylinder, and the ring on the down-stroke of the piston wiping and removing from the cylinder-wall and leading or directing back into the crankcase any surplus or excess lubricant,.and in the novel features of form, construction, arrangement, and combination, of parts hereinafter described and. afterward pointed out in the claims.

In the accompanying drawing,

Figure 1 is an elevational view of an engine-piston and wiper-ring constructed in accordance with and embodying my invention, the same being illustrated in operative connection with the cylinder shown in longitudinal section;

Fig. 2 is an inverted plan view of the ring, the piston being indicated by dotted lines;

Fig. 3 is a cross-sectional view of the pistorci1 on approximately the line 3-3, Fig. 1; an

Fig. 4' is an enlarged transverse section of the mug, operatively shown in connection with an enlarged fragmental section of the piston.

Referring now more in detail to the said drawing, in which like reference characters indicate like parts throughout the several views, 1 indicates a cylinder of an internal combustion engine of any standard or approved splash system of lubrication type. Arranged for reciprocation in cylinder 1, is a piston 2 provided near its upper or combustion-chamber end with suitable packingrings 4, asis usual.

Suitably adjacent its lower or crank-case end, as seen inFig. 1, the piston 2 is provided circumferentially with a peripheral annular grove 5. This groove 5 is preferably rectangular in section, as seen in Fig. 4, to accommodate the ring 8 hereinafter more fully described; but it will be seen that a portion of the lower wall of the groove is cut away to provide the iston circumferentially with'a beveled wa l 6 which inclines or slopes inwardly toward the groove 5, the piston2 being thereby circumferentially formed, for purposes shortly appearing, immediately next and in communication with the groove 5, with an annular oil or lubricant receiving or collecting basin. Formed in or upon the surface of the piston, is a plurality or series of spaced longitudinal grooves or lubricant-ways 7, which communicate at their upper ends with the basin 6 and lead or drain from the basin 6 to the lower or crank-end of the piston.

Fitting in the groove 5, as seen in Figs.

1 and 4, is my new wiper-ring 8, which is.

also for the most part rectangular in transverse section, and which is preferably of eccentric split construction, as seen in Fig. 2, the ring being radially expansive and its ends overlapping, as shown. The ring 8 is further of such relative size to neatly and conveniently fit within the roove 5 and expansively bear and rub at t e lower part of its outer or front face a ainstthe cylinder-wall. The upper part 0 the front or outer face of the ring 8 is, however,

beveled off or cut away inwardly at an'anle, as at 11, for purposes shortly appearmg, the wall 11 merging at its opposite ends in gently rounded corners into the upper face and the lower part of the outer face of the ring, as seen particularly in Fig. 4.

Formed in the outer part of the lower or under face of the ring 8, is an annular groove 9 preferably of inverted V-shape in section, the outer wall of the groove 9 intersecting the periphery of the ring and forming therewith at the lower outer'edge of the ring an annular scraping knife-edge 10 facing the crank-case and over-hanging zfi zing clearance between the upper part of the r face, carry up onlyv su outer face of the ring and the cylinderwall, whereby, as will now be evident, on

the up-stroke of the piston the ring 8 will,

through or by its be'arin or rubbing outer fli cient lubricant to provide for proper lubrication between the rubbing faces of the piston and cylinderwall.

On the down-stroke of the piston, any surplus or excess lubricant on the cylinder-wall will be wiped or scraped therefrom by the knife-edge 10 and be-received or collected in the groove 9, and in due course find its way or drain froni the groove 9 to the basin 6 and through the ways 7 back into the crank-case. By having the inner wall of the groove. 9 coinciding with the beveled wall of the basin 6, the lubricant has a free passage from the groove, and thus there is no possibility .of too 'much lubricant being pocketed by projecting parts of the piston.

Thus, as described, by my new wiper-ring and piston-construction, the lubricant from the crank-case is most effectively sealed from the combustion-chamber, and I have found from experience that by the use of my new wiper-ring and piston-construction, there is effected a large savin in lubricant, carbon in the cylinders and fowling of the sparkplugs greatly obviated, the efficiency of the engine maintained, and the mileage obtained considerably increased.

I am aware that changes in the form, construction, arrangement, and combmation of the several parts of my Wiper-ring and:

piston-construction may be made and subs. I stituted for those herein shown and. de-

scribed without departing from the nature in the cylinder, the piston being provided adjacent its crank-case end with a circumferential ring-receiving groove, the lower wall of the groove being partly cut-away to form a circumferential lubricant-receiving basin immediately next said groove,

. and an expansive ring fitting in said roove andhaving a bearing against the c inder- Wall, the ring being provided on i s under face and next its periphery with an inverted V-shaped' annular groove, the outer wall of the groove formin with the periphery of the ring an annu ar scraping-knife-edge, said edge over-hanging said basin and said ring-groove communicating directl with said basin, the piston being provide longi: tudinally with a series of spaced surface grooves leading from said basin to the crank-case end of the piston.

2. The combination with the cylinder of an engine, of a piston adapted to reciprocate in said cylinder and provided adjacent to its crank-case end with a circumferential ring-receiving groove, the lower wall. of

said groove partlycut away to form a circumferential lubricant-receiving basin next to said groove, and'an expansive ring fitting in said groove and adapted to bear against thecylinder wall, the ring being provided on its under face and next its outer periphery with aninverted V-shape d annular groove, the outer wall of said groove forming with the periphery of the ring an annular scra-p- In witness whereof I have signed my. name to this specification.

JOHN E; MEGsoN;

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