US945458A - Metallic packing. - Google Patents

Description

F. HBNNEBUHLE. METALLIC PACKING.

APPLICATION FILED MAR. 20, 1909.

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' METALLIC PACKING. APPLICATION TILED an. 20', 1909.

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Patented J UNITED STATES PATENT FFIGE.

FRANK HENNEBGHLE, OF CHICAGO, ILLINOIS.

METALLIC PACKING.

To all whom it may concern:

Be it known that I, FRANK HENNEBoHLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Metallic Packing, of which the following is a specification.

This invention relates to packing for piston rods and other reciprocating and rotating rods and shafts; and its object is to increase the efliciency of such packing.

In the accompanying drawings, Figure 1 is a central longitudinal section through a stufiing box provided with metallic packing embodying the features of my invention. Fig. 2 is a transverse section through a portion of the devices shown in Fig. 1. Fig. 3 is a top plan view of a packing ring of modified or alternative construction. Fig. 41 is an inner edge view of one segment of the ring shown in Fig. 8. Fig. is a top plan view of another modified or alternative construction, and Fig. 6 is an outer edge view of a section of the packing ring illustrated in Fig. 5. Figs. 7 and 8 show alternative forms of tongue-and-groove connections.

In Fig. 1, a indicates the stuffing box of an engine or pump cylinder, and b the gland, the latter being secured in place by bolts 0. The packing, proper, is contained within a casing 1 seated upon the bottom of the stuffing box, a tight joint being made between said casing and the stuffing box in any suitable way, as, for example, by an annular soft metal gasket 2. The packing proper is confined between the end wall 8 of the casing 1 and a set collar 1, said collar having a screw-thread connection with the annular wall of said casing.

In the illustrative embodiment shown in Fig. 1, the packing proper comprises two rings, each consisting of six metallic sections. Three of said sect-ions (designated by the numeral 5 in the drawing) are alike in size and form. Alternating with the sections 5 .are smaller sections 6. The lines of division between the sections 5 and 6 are, generally speaking, tangential to the periphery of the rod or shaft (Z, therefore it will be seen that when pressure is applied to the outer side of the sections 5 the sect-ions 6 will tend to move inward.

In order to obtain a fluid-tight joint between the sections 5 and 6, the joints between said sections are formed of tongues and grooves. In the form of ring shown in Fig.

Specification of Letters Patent.

Application filed March 20, 1909.

Patented Jan. 4, 1910.

Serial No. 484,671.

1 tongues 7 are provided upon the sections 6 to enter grooves 8 in the sections 5, said tongues and grooves being formed upon an angle of The packing rings may be surrounded by a band or ring 9.

The means herein shown for holding the sections of each packing ring in close contact with the rod or shaft consists of a spring 10 secured at a point between its ends by a screw 11 to the middle of each section 5 and upon the outer side of said section. The ends of the spring 10 bear against the outer band 9. The outer sides of the sections 5 and 6 may be grooved as at 12, and each section 5 may have thereon a fiat surface 13 to which the spring 10 is secured. Said spring lies within the groove 12 and is thereby held against displacement.

If desired, suitable means may be provided for holding a plurality of packing rings in proper overlapping relation, as, for example, a pin 14: fixed in one of the sections 5 of one ring and extending into an opening 15 in one of the sections 5 of the other ring.

Where the packing is applied to a horizontal rod, means may be provided for supporting the rings in proper relation to the rod. In Fig. 2 I have shown a spring 16, the mid-portion of which is attached to the band 9, and the ends of which bear upon the annular wall of the casing 1. One end of the spring 16 may be bent to lie in a recess 17 in the casing wall, for the purpose of preventing displacement of said spring.

In use, the sections 5 and 6 are held in close contact with the rod or shaft to be packed, effectually preventing any leakage along said shaft. As the inner surfaces of the sections 5 and 6 wear, the springs 10 move said sections inward, the sections 6 sliding upon the tongue and groove joints. Said joints, by reason of the considerable extent of contacting surface between the tongues and the grooves, serve efliciently to prevent leakage between the sections of the packing rings.

In Fig. 3 is illustrated a packing ring of three similar sections 18, the joints between the sections being on tangential lines, as in the case of the six-section rings just described. Tongue and groove joints are formed between the sections 18. Each section is provided with a spring 19 secured at its middle to the middle of the section, the ends of said springs bearing upon a surrounding band 20. As the sections 18 wear, the tongued ends slide inwardly upon the grooved ends under the action of the springs 19.

Fig. 5 shows a packing ring consisting of four similar sections 21 slidably connected by tangential tongue and groove joints. Each section 21 is held in close contact with the rod or shaft by a spring 22 secured to the section and bearing at its ends upon an inclosing ring 23.

The tongues and grooves in the various packing rings herein illustrated need not be V-shape, but may be of various forms, as, for instance, the shapes shown in Figs. 7 and 8. The last mentioned shapes, however, are substantially V-shape, for the reason that they are adapted to provide a fluid-tight joint by pressure placed upon the segments, the tongues being forced into close contact with the walls of the grooves.

In practice, I have found the three-section rings best suited for packing rocking rods,

*and the four-section and six-section rings for reciprocating rods.

Because of the great extent of contacting surface between the tongues and grooves of my improved rings, fewer rings are required in a given packing than would be needed if rings of the constructions heretofore known were used.

It will be understood that the tongues and grooves may be formed upon various angles, that the thickness of the rings will vary with the diameter of the rod and the angle of the tongue and groove connections,

and that any required number of rings may be used.

l Vhen my improved packing is to be applied to engines not specially adapted for its use, a casing to hold the packing rings may be substituted for the ordinary gland and secured in place on the stuffing box, as shown in Figs. 1 and 2 of Patent No. 907,597, issued to me on December 22, 1908.

I claim as my invention:

1. A metallic packing ring consisting of three similar sections alternating with three smaller sections, said sections having slid ing V-shape tongue-and-groove joints between them, the tongues being adapted to be pressed into fluid-tight contact with the Walls of the grooves.

2. A metallic packing ring consisting of a plurality of sections having sliding V-shape tongue-andgroove oints between them, said joints being formed on lines tangential to the rod to be packed.

3. A metallic packing ring consisting of a plurality of sections, and individual leaf springs secured to sections of the ring, the sections that have springs secured thereto being grooved in their outer edges to hold the springs from displacement, the springs being secured by their middle portions to the middle portions of the sections and being of substantially the same length as their sections.

FRANK HENNEBOHLE.

\Vitnesses J. RAYMOND Bonsn, GEORGE L. GHINDAHL.

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