US1246879A

US1246879A - Valve.

Info

Publication number: US1246879A
Application number: US6734915A
Authority: US
Inventors: Lee S Chadwick
Original assignee: CLEVELAND METAL PRODUCTS Co
Current assignee: CLEVELAND METAL PRODUCTS Co
Priority date: 1915-12-17
Filing date: 1915-12-17
Publication date: 1917-11-20
Anticipated expiration: 1934-11-20

Description

L. S. CHADWICK.

VALVE.

APPLICATION FILED DEC. 17. 1915.

1 2 163579 Patented Nov. 20, 1917.

UNITED STATEE PATENT @FFTEE LEE S. CHADWICK, OF EAST CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELAND METAL PRODUCTS COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

varivn fipeciflcation of Letters Patent.

Patented Nov. 1917.

Application filed December 17, 1915. Serial No. 67,849.

To all whom it may concern:

Be it known that 1, LEE S. Gmnwrcx, a citizen of the United States, residing at East Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to valves, and particularly to an improved valve construction that is especially suitable for use with that class of liquid dispensing devices shown in my Letters Patent No. 1,137,574, issued April 27 1915. The invention has for its principal object to maintain or increase the eiiiciency of the valves of the character therein shown, while greatly simplifying the construction, cheapening the manufacture, and increasing the durability of the valve.

Other objects attained through the peculiar design and construction of the valve will become apparent as this description advances; and now as l proceed to describe the invention by reference to' the accompanying drawing, I wish to be understood as not limiting myself to the structural details illustrated therein, further than is required by the terms of the annexed claims, and is rendered necessary by the state of the prior art.

In the drawing, Figure 1 represents a fragmentary side elevation of a dis ensing rece tacle having my improved va ve applie thereto; Fig. 2 is a vertical section through a distributing receptacle over which is inverted the dispensing receptacle of Fig. 1, the valve being shown in section, and .un-

' seated as is normal when thadispensing receptacle is in place; Fig. 3 is an eniarged central section through the valve and neck.

of the receptacle, the valve being seated in this case, as if the dispensing receptacle were lifted from the distrlbuting receptacle; and Fig, 4 shows the various elements of the valve in perspective.

The dispensing receptacle 1 has a neck 2 that is provided with an externally threaded extension 3 to which may be applied the threaded cylindrical wall of the cap 4 of my improved valve. The cap is completed by an end wall that is divided into two concentrlc annular sections, the outer section ,5 preferably corresponding in shape to the end of the extension 3, which, in the present case, is straight, and the other section 6 preferably made of an integral piece of sheet metal that is drawn into a comparatively long and narrow cylindrical stem 11 that is flared at one end to constitute the frusto conical portion 12, and at the other end, is reduced in diameter to form a rivet extension 13. Before the parts are assembled, the rivet'extension is entirely cylindrical, as shown in Fig. 4. The frusto conical portion of the valve is arranged to cooperate with the torus seat 6. By reason of the difference in the radial sectional shape of the valve seat and the portion of the valve which cooperates therewith, only a line contact is obtained between the engaging portions. This has the advantage of assuring a positive seating of the valve. If the two were of the same radial section, and a particle of foreign matter should lodge between the valve and its seat, it would unseat the valve practically its entire circumference, and it will be seen that such a condition is quite likely to exist where so much of the surfaces are intended for engagement. In the case of the torus valve seat, however, if any foreign substance is deposited upon the seat or valve, in the vicinity of the line of contact between the two, the same will be wedged away from such line of contact, by reason of the surfaces receding therefrom. As far as the line contact is concerned, this might be accomplished by reversing conditions and making the valve seat substantially frusto conical, and the portion of the valve which cooperates therewith, substantially spherical. Such a construction, however, would have the disadvantage of allowing the valve to seat with the stem thereof at any angle with respect to the plane of the seat, because the line of contact on the valve would be absolutely circular, regardless of the angular position of the valve stem. In valves of the character herein shown, this would be a decided disadvantage, for it would allow the dispensing receptacle to be inverted over the distributing receptacle with the valve stem turned so much to one side that instead of the bottom of the distributing receptacle engaging squarely on the end of the valve stem and forcing the valve off its seat, it would be liable to strike more on the side of the valve stem and either fail to unseat it, or bend or otherwise injure the valve. Therefore, I lay considerable importance upon making the ,valve seat of torus formation, and the engaging portion of the valve frusto conical, for, with such an arrangement, if the valve stem is inadvertently turned materially out of alinement with the longitudinal axis of the dispensing receptacle, it will automatically right itself because of the fact that when in any other position, the frusto conical portion of the valve will present only two points of contact to the valve seat, thereby allowing the spring to right the valve, the cross section of the valve in the plane of such points of contact and parallel to the plane of the valve seat being elliptical rather than circular, as was the case in the foregoing illustration of the spherical valve.

A cupped washer or abutment member 15 is applied to the rivet extension 13 of the valve stem, and such extension is then u set or flattened, as shown clearly at 16, in Fig. 3, to securely hold the abutment member or washer to the valve stem. A coil spring 17, preferably conical in shape, has its smaller end confined within the cupped washer 15, while its opposite end reposes within the seat formed by the depressed outer surface of the valve seat or sectio 6 of the cap.

Having thus described my invention, what I claim is:

1. The combination of a valve having a substantially frusto conical portion, a torus seat wherewith said portion of the valve is arranged to cooperate, the valve having an extension which projects through the seat, and the seat having a reverse side which aaesae constitutes an abutment for a spring, an 5 abutment carried by the aforesaid extension, and a spring confined between said abutments.

. 2. The combination of a. valve formed of sheet metal and comprising a cylindrical neck having a flared substantially frusto conical portion at one end, an annular pressed metal seat wherewith the frusto conical portion is arranged to cooperate, such seat being radially convexed toward the aforesaid frusto conical portion, and means tending to move the flared portion of the valve toward the seat.

3. The combination of a sheet metal valve comprising a cylindrical neck having a flared seat engaging portion at one end and a rivet extension at the other, an abutment secured to said neck by such rivet extension, a pressed metal seat with one side of which the aforesaid portion of the valve cooperates, and a spring confined between the reverse side of said seat and the aforesaid abutment.

L The combination of a valve formed of sheet metal and comprising a cylindrical neck having a flared substantially frusto conical portion at one end and a rivet extension at the other, an abutment member secured to the neck by said rivet extension, an annular pressed metal seat wherewith the frusto conical portion is arranged to cooperate, such seat being radially convexed toward the aforesaid frusto conical portion, and a spring interposed between the aforesaid abutment member and the reverse side of the valve seat.

5. The combination of an integral sheet metal valve comprising a cylindrical neck having a rivet extension at one end and a flared frusto conical portion at the other, a. cupped washer secured to the stem by the aforesaid rivet extension and having its open side presented toward the aforesaid frusto conical portion of the valve, a pressed metal cup having an annular end wall that is radially convexed inward and through which projects the stem of the valve, the

frusto conical portion whereof is arranged to cooperate with the aforesaid convexed portion, and a spring confined between the reverse side of such convexed portion and the aforesaid cupped washer.

6. The combination of an integral sheet metal valve comprising a neck having a rivet extension at one end and its opposite end flared to produce a seat engaging por tion, a cupped washer secured to the neck by the aforesaid rivet extension and having its open side presented toward the aforesaid flared portion, a sheet metal seat with one surface of which the aforesaid seat engaging portion of the valve is arranged to cooperate, and a spring interposed between the i seaeva reverse surface of said seat and the aforeaxes of the valve anti seat are maintained said cupped washer. coincident with each other. 10 7. The combination of a non yielding In testimony whereof, I hereunto aflix my torus valve seat, a valve having a substansignature in the presence of two witnesses.

5 tially frusto conical portion for engagement LEE S. CHADWICK.

with said seat and capable of tilting with Witnesses: respect thereto, and means tending to force H. K. BELL,

the valve against the seat wherefore the H. B. McGlLL.