US1629504A - Method of making valves - Google Patents

Description

l.. NERSEN METHOD OF MAKING VALVES Filed Jan. 23, 1924 May 24, 1927.

May 24, 1927. 1,629,504

L.. IVERSEN METHOD OF MAKING VALVES Filed Jan. 23, 1924 2 Sheets-Sheet 2 patented May 124,1927ls v UNITED STATES imrala'rl oFFIcE.

LORENZ IVERSEN, 0F PITTSBURGH, PENNSYLVANIA.

METHOD on MAKING VALVES.

Application filed January 23, 1924.- Serial No. 687,971.

The present invention relates broadly to the method of making valves, and more particularly to valves of the character adaptedV for use with fluid pumps and compressors.

In valves of the type to which the present invention relates, it is desirable to provide a valve spring of such construction that itparting Vfrom the spirit of the invention or scope of my broader claims.

In the drawings: A

Figure l is a top plan view, partly broken away, of a completed valve;

Figure Q is a transverse sectional View on the line II-II of Figure l;

Figure v3 is a vertical sectional view through a set of forming dies showing a blank in position for the first forming step;

Figure 1l is a view similar to Figure 3, illustrating a second set of forming dies adapted to perform a second forming operation on the partly shaped blank; and y Figure 5 is a view similar to Figure 3 through athird set of forming dies illustrating the lin-al forming operation.

Certain features of the valve struct-ure herein disclosed have been made the subject matter of my copending application, Serial No. 687,970, tiled of even date herewith.

In carrying out the present invention, there may be provided a valve spring 2, of rectangular cross section, being preferably constructed of thin flat metal having a sufficient cross sectional area in a direction at substantially right angles to the aXis of the spring to effectively resist lateral deflection. The spring is preferably of tapered outline, comprising a y with the end convolutions substantially flat. The larger end convolution 8 is preferably formed to provide a continuous substantially circular outer surface, adapted to cooperate with a valve plate 4, which may be advantageously formed into position therearound,

series of nesting` convolutions as hereinafter more'fully pointed out. This Yform of'valve spring may be easily formed by simply cutting a circular body of material along a spiral line, starting and finishing within said body. Q e

In Figure 3 of the drawings, there is illustrated a pair of dies, one of which is formed with a recess 5, adapted to receive the other. y

In the lirst operation, there is placed across the recessed die a body of materiall from;

which a valve body is formed, this body preferably being in the Aform of an annulus A.V The male die is `then brought intoccoperative engagement with theannulus to press it into the recess 5, as clearly shown in Figure a, and form a cup-shaped ,blank having an upturned peripheral edge 6.l This blank at the conclusion of the first forming operation may be retained in the recessed formino' die or may be transferred therefrom into a second die of similar construction. There is then'placed within this blank the larger end convolution 3 of a valve spring of the. character before described. The outer diameter of this 'end convolution may be slightly smaller than the internal diameter of the blank, but it is preferably substantially equal thereto. The continuousouter surface of the larger end convolution bears against the upturned edge 6. Thereafter this edge may be subjected to the action of a die 7 effective for slightly turning the edge inwardly into a position substantially as illustrated in Figure 5. Asuitable die 8 may then be brought into cooperative engagement with the partially inturned edge to bend the same inwardly around the larger end convolution of thespring. Due to the 'continuous and uniform support provided by the end convolution r3, the edge 6 bends in smoothly and evenly, and firmly clamps the spring in position. The greater the pressure exerted in completing the bending in of the edge 6, the tighter will be the union between the spring and valve plate.

lVliile I have described the method of forming a plate about a spring by the use of dies, it will be understood that by reason vof the continuous surface provided by the endy convolution 3, the same results may be accomplished by spinning as well understood in the art.

The advantages of the present invention arise from the provision of a method of making valves in which the spring has the property of resisting lateral deflection and is so shaped that a continuous and uniform bearing or engaging surface is provided between the valve spring and the valve plate, and in which the plate is removable as may be required.

I claim:

l. The method of making valves, which comprises cupping a blank to form a peripherally extending flange thereon, inserting the end convolution of a spring into position, within said flange, and then bending the flange 'inwardly around said convolution, substantially as described.

2. The method of making valves, which comprises capping an annulus to il'orin a continuous peripheral flange thereon, inserting the end convolution of a tapered spring into position within said flange,and then bending` the flange inwardly aro-und said convolution, substantially as described.

3. The method of making valves, which comprises clipping` a blank to form a peripheral flange thereon, inserting the end convolution ot a tapered spring into position within said flange, and then bending the flange inwardly into substantial parallelism with the bottom of the cupped annulus and uniformly supporting the blank by the end convolution during the bending operation, substantially as described.

Il. The method of nia-king circular valves, which consists in cupping a blank to form a peripheral flange thereon, inserting the larger end convolution of a tapered spring Within said llange, bending said flange inwardly, and then further bending said fiange around said end convolution to form a continuous clamping engagement between the sprin 4 and the bent flange, substantially as descri ed.

5. The method of making valves, comprising forming a spring of substantially rectangular metal having nesting convolutionsy and ol sufficient cross sectional area in a direction at right angles to its axis to resist lateral deflection, partially forming an annulus, placing the partially formed annulus and spring in cooperative engagement,

said convolution while supportingv the blank by the Spring, substantially as described.

7. The method of making valves, comprising forming a spring off relatively thiny flat metal having` nesting convolutions and of sufcient cross sectional area in a direction at right angles to its axis to. resist lateral deflection, partially forming an annulus,v placing' the partially :formed annulus and spring in cooperative engagement,l and bending' the edge of the annulus around one of the convolutions. of the Yspring while sup-V porting the annulus by the spring, substantially-as described. e l

8. In the method of making valves, the steps consisting in forming a blank'and a spring, bringing one end convolution of' the spring into engagement with the blank, and forming the blank around said Vconvolution while suppoitingl the blank by suchend convolution; substantially as described'.

9. In the method Of making valves, the steps consisting in forming an annulus and a tapered spring, bringing the larger end convolution of, the spring into engagementk with the annulus, and bending the annulus around the outer edge of said convolution, substantially as described.

l0. In the method ot making valves, the steps consisting in forming a springl having one end convolution shaped to provide a substantially continuous surface, bringing said end convolution into engagement with a blank, and then bending the blank around said convolution, substantially as described.

In testimony whereof I have hereunto set my hand.l

LORENZ IVERSEN.

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