US770926A

US770926A - Piston-rod packing.

Info

Publication number: US770926A
Application number: US20559104A
Authority: US
Inventors: Hampton P Rhodes
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-04-29
Filing date: 1904-04-29
Publication date: 1904-09-27
Anticipated expiration: 1921-09-27

Description

No. 770,926. PATENTED SEPT. 27, 1904.

' H. P. RHODES.

PISTON ROD PACKING.

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Hull!! .lllllll No. 770,926. PA'UNIED SEPT. 27, 1904.

' H. P. RHODES.

-PISTON Ron PACKING.

APPLICATION FILED APR. 29. 1904.

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Ham/afan P Rhodes.

`UNTTED STATES Patented September 27, 1904.

PATENT OEErcE.

PlSTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent NO. 770,926, dated September 27, 1,904.

Application led April Z9, 1904. Serial No. 205,591. (No model.)

To all whom, t may concern:

Be it known that I, HAMPTON P. RHODES, residing at Shreveport, in the parish of Caddo and State of Louisiana, have invented a new and Improved Piston-Rod Packing, of which the following is a specification.

My invention relates to improvements in that class of rod-packing improvements in which metallic packing members are mounted within the stuiiing-box arranged to be snugly held up against the rod to provide for tightly packing the same.

In its generic nature my invention embodies a series of ring-segments formed of metal that are iiexibly connected in such manner whereby the several segments in each ring will be held in 'such cooperative relation as to provide a substantial continuous circular bearing or packing surface and in such manner that the several segments in a section act as a solid metal ring, possessing, however, such' pliability as is usually found in soft-material bearing-rings, whereby to open and close around rods of slightly-irregular diameters, and thereby automatically expand or contract with respect to the rods as the varying thicknesses or irregular peripheral surfaces thereof may make necessary to provide for a proper packing.

In its more complete make-up my invention embodies a stuiiing-box and an annular cushion held within the bore of the stufHng-box, which may be formed of a single member or in sections joined to produce a circular member, said cushion having a plurality of horizontal iianges each adapted to fit between a pair of superposed metallic ring-sections to hold the said metallic ring-sections from contacting with each other and from engaging the side of the stuffing-box, said annular cushion being also provided to form a yielding surface to take up the radial expansion of the rings to provide the required elasticity for holding the said metal bearing-rings against the rod.

Furthermore, my invention, in addition to the annular cushion and the segmental rings before referred to, includes a supplemental cushioning means of a substance harder than the main cushioning member arranged to engage the peripheral edges of the several metallic packing members in such manner as to cause them to iit square against the pistonrod and to also close the joints between the several parts to elfectually prevent escape of steam or any other iiuid--such as oil-ammonia, water, or gas-through the stufling-box.

In its more subordinate features my invention consists in certain details of construction and novel combination of parts that are so cooperatively arranged that they can be economically and easily manufactured, which will serve for the purpose intended, and which can be readily adjusted for use, all of which will be hereinafter fully described, specifically pointed out in the appended claims, and illustrated in the accompanying drawings, in which- Figure 1 is a vertical section of the stuffing-box with my improved packing applied for use. Fig'. 2 is a top plan view thereof with the gland or cap member removed. Fig. 3 is a horizontal section thereof, taken practically on the line 3 3 of Fig. 4. Fig. t is a similar view taken on the line 4 4 of Fig. l. Fig. 5 is a detail perspective view of one series of metal packing-segments that constitute a complete packing. Fig. 6 is a detail perspective view of one of the segments of said ring. Fig. 7 is a perspective view of one set of cushion rings or holders with their coacting metallic ring-segments and illustrating a preferred construction of the said cushionring. Fig. 8 is a perspective view of a moditied form of cushion or holder, said holder being shown as composed of semicircular solid members, the said members, together with the metal rings supported thereby, being shown separated. Fig. 9 is a detail perspective view of one of the cushion or holder members shown in Fig. 8. Fig. 10 is a detail view of one of the supplemental cushionrings hereinafter referred to.

In the drawings, l designates the stuflingboX, which is of the usual construction, 2 the gland thereof that enters the box at one end, the top in the present illustration, and which is ad justably pressed down against the internally-held packing device presently explained by the adjusting-bolts 15 15, and the bottom of the box l has a central aperture la for the IOO rod 3, which also plays in the central bearing 2a in the gland, as usual.

My improved packing device comprises a holder A of special design, formed of a cushioning or elastic material, such as hard rubber or soft rubber mixed with asbestos or other suitable material capable of' being compressed into a solid body having a stiff elastic or cushioning action under pressure.

Each holder A carries anumber of' arbitrarily-arranged metallic packing members B, which are-connected with the holderA in such manner that the said holder, together with the packing members supported therein, can be readily fitted as a whole into or withdrawn from the stuffing-box. rI`he holderAin the preferred construction is made of sections, preferably two semicircular sections, as shown in Fig. 8, the ends a a of' which are adapted to tightly abut to form square shoulders, and the said holder A has adiameter to snugly fit with its perpendicular or circumferential edge c tightly against the inner wall of the stuffing-box. The holder A in my arrangement of packing devices acts as a vibratory or radial expansible member to permit the piston-rod 3 to run out of' true alinement, the same as if the rod were in aperfect condition. Each section of the holder A consists of' a thick vertical portion l and an upper and lower inwardly-ex-V tended horizontal annular flange c, the upper face of' the lower and the under face of theA upper flange being concaved, as atf, from the part d to the inner or rod-engaging end for reasons presently explained. Each holder A, as shown, is arranged to hold two sets of metallic paeking-rings B B; but I desire it understood the said holder A may be formed with a greater number of flanges a2 to receive a greater number of' metallic rings B.

Each packing-ring B consists of a number' of segmental sections b, which may have three sections of like size or a greater number of sections 7) b of' different sizes, as shown in Fig. 5, but of such correlative size that when joined they make a complete ring. The-several metallic sections B are linked together at the ends by a fiexible connection C, which may be and preferably is a piece of soft-metal rod-wire, the opposite ends of which are molded in the abutment ends b5 of' the ring-sections. The connection C in practice may, however, be of' any soft material that will not scratch the piston-rod should it come into conv tact therewith. The said rings B have such internal diameters that their bearing edges 3 constitute a circle much less than the internal diameters of' the holders A, such correlative sizes of the' rings B and the holders A being provided so that only the edges of the metal rings B are heldv to engage with the rod 3. By joining the metal ring-sections in the manner stated the same will be held as a solid ring and having such pliable adjustment as to act on the rod 3 substantially the same as does a soft packing-ring, and to provide for a perfect solid bearing for the rod the several rings B in each holder are so positioned that the joints of' one ring break with the joints of the adjacent ring, as shown.

The several ring members in each holder A are held out of engagement with each other,

and for such purpose each section has a fiat surface that terminates in a convexed face and the convexed surface .fr of' the said ring is so arranged as to snugly seat within the concaved surface ofthe fiange t2 of the holder, with which the respective metallic surfaces engage,

the con vexed concavo fitting of the ring-secby to form, as it were, an annular groove D between the opposing rings B and the adjacent cushionwall Vand square in crossnsection. Within the annular groove I) is tightly fitted -a ring E, square in cross-section, of' a pliable substance, much harder, however, than the cushion B and the said ring, which may consist ofl semicircular sections or be ofl a greater number of segments, if' desired. rllhe rings E, together with the concaved convexed con tacting surface between the rings and the holder-fianges, serve to maintain the metal. rings B square against. the piston-rod 3 and hold the said metal rings in position, as well as providing for adjusting the said rings from time to time.

By providing the peculiar arrangement of' metal rings B and supporting them within the peculiarly-constructed cushion-body holders A the several metal rings are so held with respect to each other and to the holders A as to provide fiuid-tight connections that prevent any leakage whatever, and thereby reduce the danger of decaying the cushion to the minimum.

While I have shown but two holders A, with their coacting metal packing-rings, it is mani' fest a `greater number of' said holders may be provided. The arrangement of the holder and the rings admits of easily fitting the sev'- eral parts within the stufling-box or for removing them and also for conveniently adjusting the several rings within their respective holders.

After the holders with their rings have been inserted within the stuffing-box the several holders may be tightly clamped into position by forcing down the gland in the manner clearly explained in Fig. l.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

l. A rod-packing comprising an annular IOO holder formed of an elastic material and adapted to snugly fit within the stuffing-box, said holder having a plurality of inwardly-projecting annular flanges at each side and a central flange disposed midway said side flanges, metallic packing-rings detachably supported between the said side and central flanges of the holderwith their inner or bearing surfaces projected beyond the inner edge of the holder substantially as shown and for the purposes described. l

2. A rod-packingwhich comprises an annular holder formed of an elastic material, said holder having side andcentral annular flanges, a series of metallic bearing-rings detachably supported on the holder in superposed positions and between said flanges, the internal diameters of the said rings being less than the internal diameter of the holder-flanges, said rings being so connected with the holder as to be moved with the holder from within the stufling-box.

3. A rod-packing of the character described, comprising a holder formed of an elastic body provided with inwardly-extended horizontal flanges, a plurality of metallic rings havinga superposed relation detachably supported by the holder between the horizontal flanges thereof, each of said rings consisting of segmental members flexibly joined at the ends and provided with a right-angled groove on the peripheral edge thereof, and a supplemental elastic ring adapted to fit within the said right-angled groove of the metallic rings and to bear against the adjacent wall of the elastic holder, all being arranged substantially as shown and for the purposes described.

4. In a rod-packing of the character described, a holder formed of an annular-shaped elastic body adapted to snugly lit within a stuffing-box, and a series of metallic rings detachably supported upon the said holder, said metallic rings being projected beyond the inner edge of the'holder, the said metallic rings consisting of segmental sections, said segmental sections having pins at one end and bores at the other ends, said pins and bores cooperating with each other to serve to hold the sections loosely together substantially as shown and for the purposes specified.

5. The hereinbeforedescribed improved rod-packing which consists of a holder formed of an annular-shaped elastic body composed of segmental sections, each of said sections having an upper and a lower inwardly-projected flange, the inner faces of said flange being concaved, a supplemental elastic ring formed of sections located on the inner face of the holder at a point midway the horizontal flanges, at the opposite ends thereof', and a pair of metal rings, said rings having conveXed surfaces to engage the concaved surfaces of the holder-flanges and provided with right-angled grooves in their peripheral edges, the said rings being disposed with their right-angled grooves opposing each other whereby to form an annular groove square in cross-section adapted to receive the supplemental elastic ring, the said metal rings being formed of segmental sections, the abuting ends of which are flexibly joined, the joints of thel several segments of one ring being arranged intermediate of the joints in the adjacent ring, all being arranged substantially as shown and for the purposes described.

HAMPTON P. RHODES.

Witnesses:

J. H. LEVY, S. O. WILLIAMS.