US1218317A - Puppet-valve for internal-combustion engines. - Google Patents

Description

G. R.,R|'cH-. -PUPPE'IVALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED NOV. IT I9I3'.

' 'Patented Mar. 1917.-

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-35` which seats upon the UNITED. sTATEs PATENT oEEIoE. l

GEORGE R. RICH, OF OAK PARK, ILLINOIS, ASSIGNOR TO RICH TOOL COMPANY, F

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.y

PUPPET-VALVE FOR INTERNAL-COMBUSTION ENGINES.

To all whom z't may concern:

Be it known that I, GEORGE R. RICH, a citizen of the United States, and a resident of Oak Park, county of Cook, and Sta-te of Illinois, have invented certain new and useful Improvements in Puppet-Valves for Internal-Combustion Engines, of which the following is declared to be a full, clear, and exact description. This invention relates to puppetvalves for internal combustion engines and its object is to provide a cheap, simple and eicient puppet valve of improved construction and capable of successfully withstanding the effects of the high 'temperatured gases inci-` dent to internal combustion engines. The use of tungsten steel in the production of puppet valves ofthis character has become )recognizedvalmost universally since my discovery of its use in this respect, and as disclosed in my prior Patent No. 1,051,845, dated January 28, 1913, and this invention designs to provide a puppet valve which can be constructed practicall as cheap as the ordinary steel valve but- Kaving the characteristic of resisting the effects of the high temperatures developed in internal combustion engines.

The invention consists ina kpuppet valve, having a sheet metal hood formed of tungsten steel, or steel .containing a suitable percentage of tungsten, and. covering the vulnerable parts ofthe valve-that is, the head or disk-and particularly the face 'thereof valveV seat, the hood being arranged thereon in such a manner that the from the cylinder between the valve head and its hood.

40 The invention further consists inthe several novel features hereinafter forth and,

claimed.

accompanying drawing in which Figure l, is a view, partly in central longitudinal section, of a puppet valve embodying one form of `the present invention, and showing it in position on a valve seat; Fig. 2, is an end view of the valve; Fig. 3, is a plan of a blank from 'which the hood isconstructed, and Fig. 4, is a central longitudinal section of the stamped .up into cup shape, and placed on the valve head prior to the operation of securing it thereon. y'

Specification o f Letters Patent.`

pered valve seat 14, for -Th defects the end face 16, with gaseous charge may not leak out partly in elevation andV eter than the blank,

Referring to said drawing, 10, designates the stem and 11, the'head of a puppet valve, constructed of steel, its peripheral edge or face 12, being of tapered formation, as is common. inpuppet valves of this class, and the stem and head being-preferably made integral with each other, as shown; 13, designates the Wall of a cylinder having a tathe valve. ose familiar with the art, to which this invention belongs, know that part of the compressive `and explosive force in internal combustion engines is expended toward the end -of .the valve head and that the exhaust gases pass between the seat 14, and the face or edge 12, of the valve head, in discharging from the cylinder. Carbon deposits on the face or edge of the ordinary valve head and usually at one side o-f the head, and collects thereon to such an extent that the valve head cannot seat properly after a yshortperiod of usage, thereby decreasing the eiilciency of the engine, because ofthe leakage of gas, and frequently causing the stem to warp at a po-int close to the head. These I have overcome in a cheap puppet valve by making the valvehead of less size v than its seat and combining with the body of the head a thin sheet metal imperforate hood 15, comprised of tungstenv steel or ,steel containing a percentage of tungsten,

saidhood conforming to the end 16, and face 12, of the hea-d.v To guard against leakage between the head portion 11, and Vhood 15, the latter is arranged to extend across p its edge portion bent around the tapered face of the head 11, as at 17, and forced tightly against the same.

he pressure of the gaseous charge and its discharge being in the direction of thegarrows in Fig. 1, there is no possibility of leak- I I i age between thehead portion and hood. The inventlon 1s clearly illustrated 1n the In constructing the hood, I first form containing a suitable percentage of itungsten, the disks being of about one sixteenth of an inch inthickness and. of larger diamhead portion ofthe valve, so as to provide a marginal edge 15", at least as wide as the peripheral edge or face 12.

Thereafter the blank is stamped up into a cup shape (see Fig. 4.); the inner diameter of which isv practically the same as the v .largestdiameter of the head portion of the Patented Mar. 6, 191 '7. k Application led November 17, 1913. 'Serial N o. 801,392.

valve. This cup shape member is then placed upon the head portion with' its flange surrounding the peripheral face thereof, and

while hot said flange is crowded down upon' 4the face, by suitable dies,

hood, whereby the valve is free to seat per! fectly at all times and the danger of its stem warping is therefore practically eliminated. lf the hood wears loose on the head portion, it will still seat perfectly, because of the engagement of the tapered face of the head portion with the tapered inner side of the flange 17.

It is obvious that other metals having the characteristics of tungsten steel may be employed in the hood and I desire to be understood therefore, as intending in the following claim to include such substitutions for tungsten steel as are -equivalents thereof.-

claimas new and desire to secure' by Letters Patent A. puppet valve of the character described, formed with a head portion having a *ta-1V pered face, and having a thin, flanged, imperforate disk of tungsten steel covering its end and tapered face, and permanently secured thereto in close. contact therewith..

GEORGE R. RlCl-l.

Witnesses:

H. E. MULLIGAN, U. H. MELLUM.

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