US1665377A - Packing - Google Patents

Description

April 10, 1928. 1,665,377

6. F.- MURPHY PACKING Fild March 4,,- 1927 Patented Apr. 10, 1928.

..,UNI TED S f GEORGE r. innnrnx, or PHILAD LPHIA;mtwsiwams.,

V PACKING.

Application filed. March 4,1927. Serial No. 172,846. r

This invention relatesto flexible metallic packing. One of the objects of the lnvention is to provide a flexible metallic packf ing which may be readily bent into shape.

for use.

Another object of the invention is to provide a metallic packing which willreadily conform' itself to the cavity to be packed when the gland is drawn up. I I

' Another object of the invention is to provide a flexible metallic packing which is somewhat resilient and will, therefore, be less liable to leak under changes incident to 7 service conditions.

Fig. 3 1s a perspective view of a length of the packing material of Fig. 2 bent into shape.

Fig. 4 is an enlarged fragmentary sectional view illustrating the action of certain of the parts, and I v Fig. 5 is a view similar to Fig. 1 illustrating a modification of the invention.

In carrying out my invention, I make the core of the packing from a plurality of wires 7, which wires runlengthwise of the.

packing and are arranged in rows with the wires in one row substantially staggered with respect to the wires of the adjacent row or rows. It will be understood that there are many more wires than are indicated in Fig. 1, and that these may well'be of much smaller size than indicated in such figure. In the arrangement of Fig. 1- the wires are grouped into two bundles A and B, the bundles being triangular and cooperating, when assembled, to be substantially rectangular. The bundles are impregnated with graphite and each bundle has a hold ing means preferably in the form of a cover composed of wires 8 which may be wrapped or braided. The two bundles are held togetherbya cover which is preferably composed of. wire 9 wrapped or braided.

The longitudinal disposition of the wires 7 comprising the bundles --makes it possible to beveled or chamfered so that the joint will close or meetproperly.

When the packing is under compression,

the packing will adjust itself topack firmly because the two bundles of wires constituting the core can slide on each other. In ad-. dltion, under compression, the wires will.

readily bend a length of the packing into ring shape, the ends being appropriately bear upon one another, as indicatedin Fig; i

4, causingthe packing to expand in a direction at right-angles to the line ofpressure.

Because of thewrapping and the'multiplic- 1ty of longitudinally extending wires, the

packing is more or less resilient and tends to .reassume its original shape. *In other words, the packing is not apt totake a permanent set which is advantageous for a number of reasons. In the arrangement of Fig. 5, the core is made up of a single bundle of wires, but otherwise the construction is the same as that described. I

The covering may also be impregnated with graphite or otherlubricant.

In all cases I prefer, particularly if high temperatures must be withstood, to employ aluminum wire both in the coreand in the coverings or covering. Aluminum wire or wire of similar general characteristics is also advantageous in that it may be cutcleanly and readily with a knife.

I claim 1. A substantially rectangular flexible.

packing having a core composed of two bundles of wire, each bundle being triangular,

and a covering for holding the triangular bundles together; 7 1

2.'A substantially rectangular flexible packing having a core composed of two bun-' dles of wire, each bundle being triangular and having a coveringorrholding means,

and a cover for holding the bundles to-' gether.

packing having a core composed of two bundles'of, wire impregnated with lubricant,

each bundle being triangular, and a covering for holding the triangular bundles together.

V 10o 3. A substantially rectangular flexible 4, A :substent ially vrectangular flexible acking havinga, core 'com osed of two undles of wire,each bundle eing triangular, and a covering for holdingfihe triangup sk ng co p s d of 1 7 each section being composed of a pluralityof wires grouped in angular formation, and Q aflexible holdin "In 'fsestilr iqny signed my name.

g covering. whereof I EORGE F. MURPHY;

hefve hereunto

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