US1841453A - Albert - Google Patents

Description

Jan. 19, 1932. A v, RlGBY 1,841,453

METHOD OF FORMING VALVE PORTS Filed April 11, 1950 l6 A I6 V, I, f 19 \5 INVENTOR. Awe/7 IAR/qby ikdwwa fafm A TTORNEY Patented Jan. 19, 19;?2

ALBERT V. RIGBY, 05 SEARCH, PENNSYLVANIA,

ASSIGNOB, BY DIRECT AND MESNE -ASSIGNMENTS, TO THE BIGBY WFACTUBING GQMPANYyOF CLEVELAND, OHIO,

A CORPORATION OF OHIO HETHOD DE FUBMLYG VALVE PORTS Application filed April 11, 1930. Serial No. 48,350.

My invention relates to valves, relating in particular to the porting of regulating valves, having either integral or insert seats.

In the manufacture of small valves, usually cast of brass, having viderl with either an integral or insert ported seat, wherein the seat port is relatively narrow, it is well known as being impractical, and impossible in some instances, to form the port, either by core or green sand, without being rough and more or less defective in contour, or or" uncertain area. Where the opening is rough, excessive friction results, and where the contour and area. are irregular, regulation of the liquid or fluid passing therethrough will not be alike any two valves so made.

My invention has for its objects, to provide punch out and surfacing method where-- in positive results in the port formation in each and every instance is assured; provide port having smooth wells; be perfect in contour; sharp in outline; and all of the some area, and, when required, the port may he inere slit of minute width, or o1? other minute forms.

in describing my invention reference is to he heel to the accompanying drawings, form ing a part of this specification, wherein like portions in the several views of each form shown, are indicated by like numerals of reference. j

in said drawings:

Figure 1 is a sectional side elevation of a blank valve body of flat seat formation.

Fig. 2 is a like view thereof after having received the initial step in my improved method. f

Fig. 3 is also alike view of the valve seat portion thereof, after having received the secnd, or final step.

Fig. 4 is a plan View of the finished valve seat and its port.

Fig. 5 is a. perspective of the cutting tool employed in performing the initial step.

Fig. 6 is a. sectional side elevation of a blank valve body of'annuler'seet formation.

Fig. 7 is a, like view thereof, after having received the initial step in my improved method.

the body or shell pro- Fig. 8 is also a like view thereof, after havin received the second or final step.

iig. 9 is a sectional side elevation of an insertible fist seat member, in its blank formotion.

Fig. 10 is a. like view of the some, after receiving the initial stepof our method.

Fig. 11 is it like view of the same, after having received the final step.

Fig. 12 is a plan view of the some, after receiving the final step.

Fig. 13 is a side elevation of ii sleeve, as ported by any method, and

Fig. 14 is u side elevation of a tapered plug valve, as ported by my method.

Referring to the fiat seated valve casing, as shown in Figs. 1 to i inclusive, thehlenir costing 1531s provided with either a cored or bored chamber 16 and, having the seat portion 18 at the end thereof, of increased thickness upon its face.

In performing the initial step or operation, a punch cutting tool 1'7", provided with a, tapered point 18, terminating in an engularly disposed sharp cutting edge 18' or of a. shape corresponding to that of the port, is forcibly ceused to enter the under side of the seat 16 transversely, as by e blow from a. hammer, or by other impacting moons, to form a port indent or cut 19, of correspond ing form on'd depth, preferably without piercing the opposite seat side, as shown in Fig. 2, after which the tool is withdrawn.

lhe next, or final step in the operation is, to remove the surplus material from the face of the valve seat, to finish some loy suitable means, to such depth as will expose the point of the indent, thus providing e port of the desired area, as in Fig. 3, which in this instance presents in outline the term of on acute triangle. 7

Referring to Figs. 6, 7 end 8, the blank 20 is provided with the chamber 21. .Y'n'this instance, the tool is employed to initially cut transversely the ort indent 21', as shown in Fig. '7 after which the metal at the point of the indent, on the seat 22, is removed, as by boring, to uncover the some, thus providing a ported valve chamber.

Referring to Figs. 9, 10, 11 and 12, showing an insert seat, the same steps are employed, that is, the blank member 23, Fig. 9, is provided with a cavity-24.- beneath the seat portion, the tool being employed to first form the transverse indent 25, see Fig. 10, and then remove the excess metal on the seat portion proper, as shown in 11, to provide the ported seat shown in igs. 11 and 12.

-In the ported valve bushin 26, shown in Fig. 13, the port 27 thereof is first formed by cutting the port indent 27 transversely in the outer surface, and then removing metal from the interior 28 to uncover the indent and thus provide a communicating port. p In the ported plu valve 29, shown in Fig. 1 1, the same 'metho of porting is employe by first cutting the port indent 30 and then removing the surplus metal from the outer surface 31, thus providing a port extending therethrough.

It will be noted that the point of the tool for this form of indent is tapered on its sides to a wedge shape, with the cutting point inclined, the longer point portion entering first in forming the indent, and when finishedthe longer portion of the point will form the base portion of the acute angular shape.v

In the drawings, I have shown the valve seats as each having a port of like contour, but it is evident that ports of other angular or elongated contour may be made, by rea port shaping tool therein, and finally finishing same by removing metal from the side while the seat is held stationary, in forcing 7 into one side of the seat a shar pointed-cutting tool of a shape correspon 'ng to that of the port, withdrawing said tool and finally facin off the opposite side of-t e seat.

3. '%he method of forming angularly shaped ports in blank valve seats, which consists in positioning acutting tool having a shape corres onding to the port at one side of the seat, t en applying force'to cause the tool to enter the seat, and then facing oil the opposite side of the seat.

In testimony whereof I afiix my si ature.

. ALBERT V. RI BY.

viding a tool having a corresponding orm I of point. y p

The tool here shown for forming or shaping the indent, is one of simple form. for hand use, but it is evident that any suitable tool may be mechanically or otherwise employed" to outer punch, stamp or otherwise form the ort indent.

Again, it may be possible to puncture the valve seat and then remove the surplus-metal therefrom, but it is found in practice that the indent gives better results, as it avoids possible injury to the seat, such as forming a fracture therein by the spread of the metal.

Furthermore, it will he obvious that the casings, seat inserts, etc., may he finished at parts thereof other than the seat portions before undergoing the steps in my method.

I have used the term port throughout the specification and claims, which is considered as equivalent to any form of angular or slit opening.

Such changes as above set forth, relative to forming the port, its shape, or other minor changes, I consider as within the scope of my invention.

What I claim is 1. The method of porting valve seats or valves, which consists in initially sha ing a transversely disposed port therein rom the one side thereof by forcing the point of

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