US1215833A - Rod-packing. - Google Patents

Description

F. N. MASON & J. F. CRAVEN.

ROD PACKING.

APPLICATiON FlL ED JULY 25. 19m

Patented Feb. 13, 1917.

.l/V W Y ATTORNEY.

WIT/VESSE kp/W W @M FRANK N. IvTASON, OF PITTSBURGH, AND JAMES F. CRAVEN, OF GRAFTON HEIGHTS, PENNSYLVANIA; SAID CRAVEN ASSIGNOR TO SAID MASON.

ROD-PACKING.

packing designed for use in connection with steam, air, gas, or water appliances, in which it is desirable to provide a tight nonleakable packing around a movable rod or the like.

It is the object of our invention to provide certain improvements on the packing shown in Letters Patent No. 971,292 granted September 27th, 1910, to Frank N. Mason, whereby additional means are provided to prevent the passage of steam or other fluid past the packing and whereby additional lubricating means are introduced. The present invention provides means for preventing steam or other fluid from passing between the end of the sectional packing sleeve, and the bottom of the stuffing-box, and also means for preventing thepassage of steam or other fluid past the flanged en largement on the inner end of the said sleeve. Other objects will appear hereinafter.

Referring to the accompanying drawings, Figure 1 is a longitudinal section of a stuffing-box containing our invention applied to a rod shown in side elevation; Fig. 2, a perspective view of our improved sleeve assembled; Fig. 3, a bottom plan of one of the sections of the said sleeve; Fig. 4, an elevation of one of the said sections, looking toward the concave or inner surface; Fig. 5, a section on the line VV of Fig. 1; and Fig. 6, a perspective of a modified form of sleeve section.

On the drawings, 1 represents a piston-rod or the like having around it the stufiing-box 2, the gland 3, and the screw cap 4, the latter being arranged to cause the gland 3 to compress the packing-rings 5 in a manner well known.

The sleeve 6, which is composed of any suitable anti-friction metal or other antifriction material, is seated in the stuffingbox 2, surrounds the rod 1, and has its outwardly-flanged inner end 7 in fluid-tightengagement with the bottom of the stuffingbox 2. The said end of the sleeve 6 is pro- Specification of Letters Patent.

Patented Feb. 113, 1917..

Application filed July 25, 1914. Serial No. 853,065.

- vided with several ribs, which may be variously shaped and arranged, but 1 have shown some of the ribs 8 arc-shaped and intersected by radial ribs 9, whereby numerous pockets 10 are provided which open toward the bottom of the stuffing-box. The ribs provide narrow surfaces which readily adapt or adjust themselves to the shape of the bottom wall of the stuffing-box and in sure joints, past which steam or other fluid cannot force its way.

The packingrings 5 are composed of a comparatively soft yielding material, arranged in the stuffingbox 2 and around the body of the sleeve 6, and between the gland 8 and the outer face of the flange 7, that is, the face thereof opposite the face which bears the said ribs. This material may he asbestos.

The sleeve 6 is composed of a plurality of I longitudinal separable sections 11 assembled around the rod 1 with their lateral edges provided with an interlocking series of tongues. Some of the tongues, as 12. form arc-shaped extensions of the sections, but do not include the flange 7, while other tongues, as 13, include a portion of the said flange. All the tongues have their lateral edges lying in planes at right angles to the axis of the sleeve 6 or the shaft 1. The intermediate tongues on each sleeve-section lie in recesses 14 between adjacent tongues on the adjacent section the terminal tongue 15 on the reduced portion or body of each section lies in the terminal recess 16 between the outer tongue 12 and the adjacent or outer end of the adjacent section; and the terminal tongue 17. which includes a portion of the flange 7 next to the ribbed or inner end of the section, lies in the terminal recess 18 which lies between the tongue 13 and the ribbed end of the adjacent section.

The inner surface of the tongue 13 on each sleeve-section, that is, the surface nearest the ribbed end thereof or the surface nearest the bottom of the stuffing-box is provided for about a half its length and about onethird its width with the lug or ribbed extension 19 which lies in the recess 20 in the tongue 17, the end wall of the recess 20 lying somewhat beyond the end walls of the adjacent recess 14. The tongue 17 extends somewhat beyond the outer end of the adprevents the escape of steam or the like both longitudinally between the adjacent edges of the sleeve-sections, and also transversely or radially across the adjacent edges on the flanges. The adjacent sections of the flange 7 are contiguous for a distance along a plane which is normal to the axis of the sleeve and leaves about half the flange on each side thereof.

The length of the tongues and the depth of the recesses therefor are such that there is some looseness of the assembled sections on the rod whereby the sections may be adjusted toward the said rod to take up the wear between the sleeve and the rod. Fig. 2 shows spaces between the ends of the tongues and the recesses for permitting the said adjustment of the sections.

21 represent grooves on the concave or hollow surface of the sleeve-sections, for collecting condensation from the steam or compressed air, thereby preventing leakage be- 1 tween the rod and the packing. "We provide also a lubricant groove 22 on the hollow face of the sleeve-sections opposite the flange 7. This groove we made larger in width and depth than the grooves 21 and it is supplied with a chemically-mixed graphite lubricant having a high fusing point.

When the cap 4 is screwed down tightly on the gland 3, the latter causes the packing to force the ribbed end of the sleeve 6 tightly against the bottom of the stufiing-box 2 and also causes the packing to spread laterally or radially against the wall of the stuffingboX and the sleeve 6, thereby making tight joints between the packing and the startingbox and between the packing and the sleeve. At the same time the sleeve sections are brought tightly in contact with the rod 1. The cap 4 may be drawn down from time to time to take up the wear between the rod and the sleeve and keep all the joints tight.

1. In a rod packing, a stufing-box, a reciprocable rod therein, an anti-friction sleeve around the rod and w thln the studing-box, the sleeve being provlded with narrow ribs in contact with the bottom of the stuffing-box, and means for pressing the ribbed end of the sleeve against the bottom of the said stuffing-box whereby the ribs may be adjusted so as to conform to the shape of the bottom of the stufing-box.

2. In a rod packing, a stuffing-box, a reciprocable rod therein, an anti-friction sleeve around the rod and within the stuffing-box, the sleeve being provided with areshaped narrow ribs in contact with the bottom of the stufiing-box, and means for pressing the ribbed end of the'sleeve against the bottom of the said stuffing-box whereby'the ribs may be-adj usted so as to conform to the shape of the bottom of the stating-box.

3. In a rod packing, a stufling-box, a re ciprocable rod therein, an anti-friction sleeve around the rod and within the stutfing-box, the sleeve being provided with areshaped narrow ribs intersected by transverse ribs in contact with the bottom of the stuffing-box, and means for pressing the ribbed end of the sleeve against the bottom of the said striding-box whereby. the ribs may be adjusted so as to conform to the shape of the bottom of the stuiiingbox.

Signed at Pittsburgh, Pa., this 23rd day of July A. D. 1914.

FRANK N. MASON. JAMES F. CRAVEN.

Witnesses:

ALICE E. DUFF, ELVA STANIOH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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