US 601614 A
Description (OCR text may contain errors)
J. W. DUDLEY..
PISTON ROD PACKING. I No. 601,614. Patented Mar. 29, 1 898.
' 3w)??? fa WBL/JZ UNITED STATES PATENT OFFicE.
JOHN W..DUDLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO LOUIE O. ROLLO, OF SAME PLACE.
'PlSTON- ROD PACKING.
SPECIFICATION forming part of Letters Patent No. 601,614, dated March 29, 1898. Application filed June 17,1897. Serial No. 641,116. on model.)
pecially designed to be used for such rods, yet
it is applicable as a packing for valve-stems and other moving rods or parts of machinery; and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as'will be hereinafter more fully set forth and specifically claimed.
The objects of my invention are, first, to
provide a packing the parts of which may be easily assembled and readily adjusted to afford a tight or close joint around the pistonrod, valve-stem, or other rod and at the same time to allow the rodor stem a slight lateral play to accommodate any imperfect alinement which might exist in the arrangement of the parts of the machine,and, second, to provide a packing which, by reason of the peculiar construction and arrangement of its parts, will retain a sufficient quantity of oil or other lubricant, so as to keep the piston-rod at all times in a perfectly-lubricated condition.
In order to enable others skilled in the art to which my invention pertains to make and use the same, I will now proceed to describe it, referring to the accompanying drawings, in which- Figure 1 is a sectional view of a stufingboX, showing a portion of a piston-rod therein and my improved packing in position. Figs. 2 to 6, inclusive, are detached perspective views of the split rings used in the construction of my packing.
Similar letters refer to like parts throughout the difierent views of the drawings.
A represents a stuffing-box of the ordinary or any preferred construction,which is formed with a cylindrical cavity or chamber a, the bottom of which is formed with a concavity a or is inclined toward the opening in the stuffing-box which receives the piston-rod A, which passes through a suitable opening in the gland or follower A which fits in the upper portion of the stuffing-box chamber, to which it is secured by means of screw-threaded bolts a and springs a which springs are held in position and adjusted on the screw-rods a by means of nuts or, located on the upper portion of said rods. Within the cavity or chamber a of the stufling-box are located a series of ,divided or split rings or disks B, O, D, E, and F, each of which is of a peculiar form or construction and differ one from the other. These disks or rings when assembled into a group or groups,as will be presently explained, afiord a close-fitting yet yielding packing, forming a construction to retain a sufficient quantity of oil or other lubricant to properly and continually lubricate the piston-rod or other rod or stem which the packing surrounds.
The split disks or rings B, one of which is located in the upper portion of the stuifingbox and fits within the concavity a of the gland or follower and the other one located in the bottom of the stuffing-box, are beveled toward their. periphery, as shown in Figs. 1 and 2 of the drawings, and are provided with central openings somewhat larger than the piston-rod. The disks or rings 0 are likewise provided with central openings somewhat larger than the piston-rod and when in position in the stuffing-box are so placed as to break the joints of the adjacent rings thereto. The rings or disks D are substantially triangular in cross-section and are provided on their internal peripheries with circumferential grooves d to receive and retain a suitable lubricant and when in position fit the pistonrod snugly. The split rings E are beveled inwardly on one of their surfaces toward their central openings for the reception of the rod and have their external peripheries slightly curved, as at e, to receive the fibrous material G, which is in the form of a ring and is composed of asbestos'g or other suitable ma terial and a core 9 of rubber or other suitable yielding substance. Adjacent to the flat surfaces of the rings E are placed split rings F, whose external peripheries are beveled, as at f, and which rings are preferably made of soft metal.
By reference to the drawings it will be seen that the rings D, E, and F are smaller in circumference than the rings B and O and that the fibrous material G is located between the external peripheries of said rings or disks and the walls of the stuffing-box, thus forcing' said rings against the piston-rod and there holding them under a yielding preswhich offers a minimum of friction to the sure.
In the drawings I have shown a stuffingbox with the rings or disks arranged in three groups; but I do not desire to be limited to such an arrangement, as I may employ one or more of such groups. It will also be observed by reference to Fig. 1 that in the upper group the beveled portion of the ring D is on the lower surface of said ring, while in the other groups it is located on its upper surface; but in each of the groups the meeting surfaces of the rings D and E are-inclined.
In assembling the parts of my packing the disks or rings B are placed as shown in Fig. 1 of the drawings, one in the bottom or concaved portion of the stuffing-box and the other in the concave part of the follower, the rounded or beveled portions of said disks fitting said concaved portions. One of the split rings 0 is then placed on the inner or flat surface of one of the disks B, so as to break joints, and a ring D, with its fiat surface resting against the ring 0, is placed around the piston-rod, when the ring of fibrous material G may be placed between the periphery of the ring D and the walls of the stuffing-box. The ring E is then placed on the ring or disk D so that their inclined surfaces will meet,
and a ring F placed on the flat surface of the ring E, and another one of the rings 0 placed on the outer surface of the ring F, thuscompleting one of the groups.
While I have shown the bottom of the chamber of the stuffing-box and thelower portion of the gland concaved in form and the disks B of a shape to conform thereto, yet I do not desire to be limited to such a construction or form, as I may use disks with flat surfaces and the bottom of the chamber and lowerpart of the follower or gland with fiat surfaces; but the concave form of said parts will have a tendency when the gland is screwed down in the box to force the composite pieces of the packing toward the pistonrod, as is apparent. I have also shown the peripheries of the disks F beveled and those of the disks D and E slightly curved or rounded, and while such construction is preferable in that more satisfactory results are obtained by reason of the fibrous material and its yielding core pressing against the peripheriesof said disks, yet I may use other shapes orforms on the peripheries of said disks or rings.
that the central openings of the rings or disks B and G will form receptacles for a lubricant, and that the grooves din the rings D will act for a like purpose, and that a simple, inexpensive, and durable packing is afforded piston-rod.
When a stuffing-box the chamber of which has a flat bottom is used and a follower or gland with its lower part formed with a fiat surface, the rings B may be omitted and the rings 0 used in their stead.
Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-
1. In a piston-rod packing, the combination of .a hollow stuffing-box, with a series of split rings, two of which have their meeting surfaces inclined and are of less circumference than the cavity of the stufiing-box, one or more of said series of rings being of about the same circumference as the chamber of the stuffing-box and having central openings somewhat larger than the piston-rod, when located on the outer surfaces of the rings with theinclined meeting surfaces, and a ring composed of fibrous material interposed between the walls of the stuffing-box and the peripheries of the ringswith the inclined meeting surfaces, substantially as described.
2. In a piston-rod packing, the combination of a stuffing-box having a cylindrical chamber, with two split rings of less circumference than the chamber of the stuffing-box and having their meeting surfaces inclined, their external peripheries rounded or curved, split rings located on the outer surfaces of the firstnamed rings and a ring of yielding fibrous material interposed between the peripheries of the split rings having inclined surfaces and the walls of the stuffing-box, substantially as described.
3. In a packing for piston-rods, the combination of the hollow stuffing-box A, the springactuated gland A fitting therein, the split ring D,provided with the annular groove d, and one of its surfaces inclined, the split ring E, having one of its surfaces inclined, the split ring F of soft metal resting on the outer surface of the split ring E, the split rings 0, located on the outer surfaces of the rings D, and F, and the yielding fibrous material G, located between the walls of the stuffing-box and the external peripheries of the rings D, E, and F, all constructed, arranged and operating substantially as shown and described.
' JOHN W. DUDLEY.
' CHAS. O. TILLMAN,
E. A. DUGGAN.