US1891798A

US1891798A - Packing

Info

Publication number: US1891798A
Application number: US382123A
Authority: US
Inventors: Howard B Cheshire
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-07-30
Filing date: 1929-07-30
Publication date: 1932-12-20
Anticipated expiration: 1949-12-20

Description

Dec. 20, 1932. CHEsHlRE 1,891,798

PACKING Filed July 30, 1929 Iwvmwonc Hownno .B CHBHIRE.

A TTOBNE Y properly spaced.

Patented Dec. 20, 1932 UNETED STATES 7 HOWARD B. CHESHIRE, F LONG BEACH, CALIFORNIA.

PACKING Application filed July 30,

This invention relates to a metallic packing which is adapted to be used upon any reciprocating rod or shaft, or any journal packing.

An object of my invention is to provide a plurality of arcuate segments over-lapping one upon the other so that a shaft is efiectively packed irrespective of the irregularities of the shaft.

Another object is to provide a packingin which there is less pressure of the segment on thevshaft.

Still another object is to provide a packing which is elfective irrespective of the speed of the shaft therethrough.

Other objects, advantages and features of invention may appear. from the accompanying drawing, the detailed subjoined descrip tion and the appended claim. 7

In the drawing:

Figure 1 is a transverse sectional view of my packing in position on a shaft.

Figure 2 is an end view of the packing with the cover plate and spacing ring removed.

Figure 3 is a fragmentary side view of one of the spacing rings.

Referring more particularly to the drawing, my packing 1 is adapted to be placed about a shaft 2 to prevent the leakage of any fluid around said shaft. My packing comprises a pair of end plates 3+4, said end plates being spaced apart for an annular ring 5 which is grooved or recessed to receive the end plates as shown in Figure l. A plurality of packing segments 6 are arranged about the shaft 2 substantially as shown in Figure 2, and these segments are slightly spaced apart and are superimposed upon a second ring of identical segments, the segments over-lapping upon the segments of the adjacent ring. Each ring of segments is pressed inwardly against the shaft by aspring 7. Each of the segments are grooved as at 8 to receive the spring '7. In order that the segment 6 may be held 111 proper spacing relation, I provide spacing rings 910,1and these rings are provided with spacing lugs 11 which fit between the segment 6 to hold them The spaced rings 9-10 bear against the 1929. Serial No. 382,123.

end plates 84 respectively, and fit accurate 1y inside of the annular ring 5. To hold the entire assembly tightly together and also to prevent leakage between the segments or the other members of the packing, I provide a plurality of coil springs 12 which extend be-;

tween theplate at and the flange of the stuif mg box 13. The plate 3 of the packing rests against the collar 14 which forms part of the engine casting. With the arrangement just described, I have determined in actual 7 practice that there is less pressure of the segments against the shaft than in packing heretofore in use, for the reason that the surface area of the segments is the same against.

the shaft and also on the surface opposite, to the shaft. This means that the steam pressure or fluid pressure is equalized on both sides of the segments.

lVith the'arrangement of a plurality of segments as shown, irregularities in the shaft are more easily taken care of, and also the shaft is more effectively packed ofi'. With my arrangement it is not necessary to provide grooves in which the segments fit, these grooves when used, result in excessive wear on the segments. Mypacking may be'readily assembled or disassembled, in that the end plates 3-4, and the ring 5 fit one'in the otherwith a tongue and groove connection and are readily removed, in order to repair or replace the segments, springs 7 orthe like. Also additional groups of segments maybe added by merely widening the annular ring 5 to accommodate the additional segments. WVith my arrangement of a plurality of super-imposed segments, said segments being forced inwardly by the spring 7,1 automatically compensate for any wear in the segments by 1 reason of the fact that the inward pressure of the springs will urge the segments against the shaft with a practically uniform pressure until the segments have become so worn that there is no further tension in the spring 7 Having described my invention, I claim:

A metallic packing adapted to be placed around a shaft or the like, comprising a plurality of circumferentially spaced segments bearing against the shaft, a second group of superimposed segments upon the first named segments, said second group of segments being so arranged as to bear upon and cover the spaces between the first named segments, a coil spring surrounding each of said groups of segments whereby the segments are urged inwardly, end plates, an annular ring between the end plates, a. pair of spacing plates adjacent said segments, said plates being formed in one integral piece, spacing lugs projecting inwardly from the spacing plates between the segments whereby the segments are spaced about the shaft and from each other, the side edges of each of said segments being parallel to each other and said parallel edges fitting closely against the spacing lugs whereby a tight metallic packing is, provided.

In testimony whereof, I aflix my signature.

HOWARD B, CHESHIRE.