US1187362A - Protecting-jacket for valve-stems. - Google Patents

Description

R. A. MIDGLEY.

PROTECTING JACKET FOR VALVE STEMS.-

APPLICATION FILED MAR. 1. 1916.

' 1,137,362, PatentedJune 13, 1916.

aw v Meanwh- RAY ARTHUR MIDGLEY, OF GADSDEN, ALABAMA.

PROTECTING-JACKET FOR VALVE-STEMS.

' Specification of Letters Patent.

Patented June is, rare.

Application filed March 1,1916. Serial No. 81,467.

To all whom it may concern:

Be it known that I RAY A. MIDGLEY, a citizen of the United States, residing at Gadsden, in the county of Etowah, State of Alabama, have invented a new and useful Protecting Jacket or Sleeve for Valve- Stems; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

This invention relates to the art of valves, particularly to the puppet kind, and more especially to a protecting jacket or sleeve for the valve stem thereof, to prevent the carbon from burning on to the valve stem,

and to protect the same from the heat and grease, thereby avoiding'valve trouble.

Another object of the invention is the provision of a guide for the valve stem, and

over the end of which guide the protecting sleeve or jacket telescopes in spaced relation thereto when the valve is closed.

It has been found that, even though the provision of a sleeve or protecting jacket has been made heretofore, a thin coating of carbon, more or less tends to adhere to the upper end of the guide, over which the sleeve or jacket telescopes in spaced relation, therefore it is the aim of this invention to provide means to extricate or remove this coating (which also adheres to the upper extremity of the guide), hence the provision of means on the inner circumference of the sleeve or jacket, to scrape or out against such carbon, to fracture and dislodge the same.

In practical fields the details of construction may necessitate alterations, falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings: Figure 1 is a sectionalview through a portion of an internal combustion engine, showing one of its exhaust puppet valves. Fig. 2 is a cross sectional view on line 22 of Fig. 1. Fig. 3 is a view in section showing means on the interior of the sleeve or jacket for fracturing and dislodging the coating of the carbon on the guide. Fig. 4. is a sectional View on line .14: ofFig. 3. Fig. 5 is a sectional persptlective view of the sleeve or jacket and th va ve. i

Referring more especially to the drawmgs, 1 deslgnates the cylinder of an internal combustion engine surrounded by a water acket 2. Leading from the cylinder -1 is an exhaust port or chamber 3 having formed therein a valve seat 4. Mounted on the seat. 4 and normally closing the exhaust P pe port 3 is an exhaust valve 5 of the type, having its-depending stem working in a guide or hearing 7 the upper end of which is tapered as shown. The greater portion of the guide, and particularly its tapered part projects into the exhaust port 3. Formed integral with the puppet valve and the upper part of its stem thereofis a downwardly extending tapering 'sleeve 9,

which telescopes down upon the tapered part of the guide. Where the tapered part of the guide merges into the body thereof,

a curved shoulder 10 is formed. The lower extremity of the sleeve or jacket of the valve terminates in an outwardly and downwhen the valve is closed is at a spaced interval above said shoulder 10. Where the sleeve or jacket connects or merges into the under face of the valve, a contracted neck 13 is formed, which curves into the under face of the valve as shown at 1 1. The interior circumference of the sleeve or jacket is of a taper substantially corresponding to the taper of the upper portion of the guide,

'wardly flared portion or flange 12, which, I

and is slightly spaced therefrom. However,

the upper wall or end of the interior of the sleeve or jacket engages the upper end of the tapered part of the guide, thereby preventing the carbon and the like from reaching the valve stem. The lower part of the valve stem is provided with a shoulder 16,

jacket lowers with the valve, the ribs will tend to fracture and dislodge the carbon. The upper end or wall of the interior of the sleeve or jacket is provided with an annular rib 19, when the valve closes or enan exhaust valve of the puppet type, having a stem, of an elongated guide having a tapered upper extremity projecting from the lower part of the exhaust port, and in which the stem is guided, a protecting jacket or sleeve extending from the under face of the valve where the stem connects thereto and being tapered in conformity with the upper tapered part of the guide, to telescope thereover in slightly spaced relation with the tapered part of the guide, the interior circumference of the jacket and its upper end wall having means to contact with and fracture the carbon.

In testimony whereof I have signed my 'name to this specification inv the presence of two subscribing witnesses.

RAY ARTHUR MIDGLEY'.

Witnesses:

GEO. A. GLENN, ED MORIARTY.

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