US1175056A - Rod-packing. - Google Patents

Description

A. M. FOWLER.

ROD PACKING.

APPLICATION FILED MAY 22. 1915.

THH 1 i9 20 WEED STATES PATENT @FFEQE.

ARIS' M. FOWLER, OF EAST lOINT, GEGRGLA.

BOD-PACKING.

Application filed May 22, 1915.

To all whom it may concern:

Be it known that I, Ams M. FowLnR, a citizen of the United States, residing at East Point, county of Fulton, and State of Georgia, have invented certain new and useful Improvements in Rod-Packing, of which the following is a specification.

This invention relates to rod packing and more particularly to stuffing boXes used in connection with pumps, engine cylinders, or valves to prevent the escape of water, steam,

gas or air from the pump or engine with which it is used at the juncture of the cylinder or pump head with the piston rod.

The invention aims primarily to provide an improved rod packing of simple construction, composed of but few inexpensive and readily assembled parts, which will prove thoroughly efiicient in practice and which is capable of adjustment to increase the pressure of the packing element upon the rod without the use of special instruments; I g u A further object of the invention is to provide a stuffing box or rod packing wherein adjustment may be made to create uniform pressure upon the packing element to insure a tight joint at all points in the reciprocating rod.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts, and details of construction, all as will be described more fully hereinafter and particularly pointed out in the claims.

The invention will be more readily understood by reference to the accompanying drawings wherein Figure 1 is a vertical section taken through a stuffing boX constructed in accordance with my invention, parts being illustrated in elevation. Fig. 2 is a section taken substantially along the line 22 and looking in the direction indicated by the arroW, Fig. 3 is a sectional view taken substantially along the line 3-.3 of Fig- 2, and Fig. 4: is a detail perspective view of one of the im proved sleeve sections employed in carrying my invention into effect. I

In accomplishing the objects set forth above I arrange the improved stuffing box in the form of a hollow barrel inclosing the rod, the said barrel being composed of separate sections arranged in telescopic relation to each other. structurally, the barrel comprises the separable members 5 and 6, the

Specification of Letters Patent.

Patented Mar. 14, 1916.

Serial No. 29,757.

former being arranged to inclose the adjacent end of the latter snugly. The section 5 may be formed integral with the cylinder or pump head or it may be made separate there from and secured to the head in any desired manner, the said member 5 being generally referred to hereafter as the fixed member within which the cooperating member 6 slides or telescopes. Within the barrel thus formed and inclosing the rod 7 with which it isused is a packing material 8 which may be of any desired constituency. This'paclc ing 8 is to be acted upon as the same becomes worn or upon a wearing away of the rod to keep the same tightly pressed against the rod; and to insure a uniform pressure upon the packing upon application of inward force a split collar 9 is placed thereover. As shown more clearly in Fig. 3 of the drawing the collar 9 has its ends overlapping, and as the material of which the same is constructed is preferably a thin spring steel it is obvious that upon inward pressure thereon this collapsible member will readily permit of its contraction of diameter.

As an efficient means for transmitting pressure uniformly to the packing above described, a split sleeve 10 is provided. This sleeve is shown in the present instance as being constructed of a pair of identically formed sections 11 and 12, each being bored so as to provide when properly assembled a bore through which the rod may reciprocate. The bore of each of the sleeve sections is enlarged inwardly from one end to substantially mid-way of the length of the section,

and it is to inclose the packing and its collapsible ring above described that the enlarged bore is provided. The bore for the remainder of the length of the sleeve sections is reduced in diameter to form, when the sections are assembled over a rod, a bore a trifle greater in diameter than that of the said rod, in order that the latter may be substantially inclosed and at the same time to permit of a free and unencountered movement of the said rod. At-the juncture of the different sized bores provided in the sleeve section a shoulder 13 is provided, and engaging against this shoulder is a looking washer 14 inclosing the rod 7. It is against this Washer 14 that the inner end of the packing and the collapsible ring surrounding the same engages, and to hold the washer against movement longitudinally of i the rod when the latter reciprocates the barrel.

washer will be locked against movement in either direction longitudinally of the rod 7. By providingthe groove or channel 13 of greater diameter than that of the Washer in ward and outward adjustment ofthe sleeve sections will not be prevented by the presence of the washer within the sleevesections. An annular groove 15 is formed on the outer surface of the sectional sleeve at each end thereof for the reception of spring clamps 16, the latter serving to hold the members of thesectional sleeves assembled.

From the above description it is apparent that upon inward pressure of the members constituting the various sections of the sleeve 10, the pressure will be transmitted through the split collar 9 to the packing element '8 inclosing or surroundingthe rod'7, thereby insuring a tight joint. The radial adjustment of the sleeve sections is permitted by' reason of the fact that the smaller bore of the sectional sleeve is of a diameter a trifle greater than that of the rod so that V the bore of the sleeve section is prevented from contacting the rod 7.

For the purpose of regulating the pressure without the necessity of removing any of the parts of the device, the outer surface of each of the sections forming the sectional sleeve is provided with an inclined or beveled surface constituting a rib 17 extending lengthwise of the sleeve section upon which it is formed, and which is adapted to cooperate with an inclined or beveled surface 18 formed upon the inner diameter or surface or the cap or telescopic member 6 of the It will be observed from the disclosure in Figs. 1, 3 and 4: of the drawing 7 that the beveledor inclined rib-17 is formed upon the sleeve sections in such manner that the surface upon the sameto be engaged by the inner beveled face of the cap 6 is substantially midway between the lateral edges members 5 and 6, and it is apparent that upon operation of the nuts 20 thereon inward pressure of the member 6 will be transmittedthrough the bevel or inclined face 18, through the rib. 17, 'to ultimately'operate upon the packing 8. Various degrees of pressure upon the packing may thus be had,

and as the arrangement of the several parts of the device operates to transmit uniform r pressure upon the packing it will be readily understood that wearing away of the packing or of the rod may becompensated for very readily by adjustments of the nuts 20.

It is to be observed that in the operation or ad ustments of the nuts 2-0 to force the telescopic member 6 inwardly, the sectional sleeve, together with the'packing element carried thereby, will be forced against the end or inner wall of the element 5 of the p barrel, thereby insuring against leakage of steam, water or air from the cylinder or pumprwith which the stuffing box is used. It is also obvious that a rod packing'constructed in accordance with this invention may be manufactured at extremelylow cost, and that the same may be easily and quickly applied to an engine or pump without the use of special tools 'or'instruments in'the. V 7 application or in making adjustments off the device, and that the lack of friction of any of the parts with the rod lengthens the life of the rod and of the stufling box elements.

' I claim: j

' 1. A packing box comprising a'hollow barrel formed of a pair of separable members arranged" in telescopic relation over arod, a packing within said barrel surround-Q ing said rod, a split collar of substantially thin metal surrounding said packing, a sectional sleeve provided ad acent one end with a bore for inclosing said split collar and at its opposite end having its bore reducedfor inclosing said rod, each of said sleeve sections, being provided with an arcuate groove at the intersection of said bores,

a lockingmember encircling said rod, and

engaged within said arcuate grooves, and cooperating bevel faces on said sleeve sections i and one of said separable members whereby inward pressure on the former will be increased upon inward telescopic movement of the latter,v substantially as described.

2. A stutfing box. surrounding a rod and comprising a fixed and a movable member, a rod packing in said box, a split collar inclosing said packing,-a sectional sleeve engaging over said splitv collar and adapted to be forcedinwardly thereon upon movement of said movable member in one direction, an annular groove formed inthe bore of said split sleeve, a washer of slightly less diameter than that'of said'groove encircling said rod and extending into said groove to hold said sleeve sections in locked relation, and

spring clamps inclosing said sectional sleeve, substantially as described.

3. A packing box surrounding a rod and consisting of a pair of telescopic members, a rod packing in said box, a sectional sleeve inclosing said packing and adapted to exert inward pressure thereon, each section of said sleeve being provided on its outer surface with a rib substantially mid-way between the transverse edges thereof, and one of said telescopic members being provided upon its interior with a bevel surface normally engaging said ribs, substantially as described.

4:. A packing box surrounding a rod and consisting of a pair of telescopic members, a rod packing in said box, a sectional sleeve inclosing said packing and adapted to exert inward pressure thereon, each section of said sleeve being provided on its outer surface with a longitudinally extending beveled rib substantially mid-way between the transverse edges thereof, one of said telescopic members being provided upon its interior with a bevel surface normally engaging said ribs, and means for holding said separable members in adjusted position, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' ARIS M. FOWLER. Witnesses:

Gno. L. SUGos, Jr., B. B. BAKER.

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

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